Ore conveyor
Publish: 2021-03-29 01:55:50
1. In theory
so is electricity.
so is electricity.
2. It's true that a raspberry pie with a high configuration of $35 will not be inferior to a home computer if you buy 16. It's just arithmetic, just games.
3. Coal face equipment: shearer, scraper conveyor, fully mechanized support, transfer machine, belt conveyor
2. Tunneling face equipment: roadheader, hydraulic drill truck, rock (coal) loader, conveyor
3. Roadway transportation equipment: electric locomotive, rail car, monorail crane, winch (hoist)
4. Shaft equipment: main and auxiliary shaft hoist, capsule conveyor, fan, pressure fan
auxiliary transportation equipment, such as monorail crane, rack rail car, etc<
brief introction to coal mine:
coal mine is a reasonable space for human beings to excavate coal rich geological layer, usually including roadway, adit and mining face, etc. Coal is the main solid fuel and one of the combustible organic rocks. It is formed by luxuriant plants growing in a certain geological age, graally accumulating into thick layers in a suitable geological environment, and buried in the bottom of water or sediment, after a long geological age of natural coalification. Among the geological periods in the world, the Carboniferous, Permian, Jurassic and Tertiary strata proce the most coal, which is an important coal forming age. The carbon content of coal is generally 46-97%, brown to black, with ll to metallic luster. According to the degree of coalification, coal can be divided into peat, lignite, bituminous coal and anthracite
in China, coal mining must be carried out according to law with complete and valid licenses. Implement the safety proction policy of "safety first, prevention first, comprehensive management".
2. Tunneling face equipment: roadheader, hydraulic drill truck, rock (coal) loader, conveyor
3. Roadway transportation equipment: electric locomotive, rail car, monorail crane, winch (hoist)
4. Shaft equipment: main and auxiliary shaft hoist, capsule conveyor, fan, pressure fan
auxiliary transportation equipment, such as monorail crane, rack rail car, etc<
brief introction to coal mine:
coal mine is a reasonable space for human beings to excavate coal rich geological layer, usually including roadway, adit and mining face, etc. Coal is the main solid fuel and one of the combustible organic rocks. It is formed by luxuriant plants growing in a certain geological age, graally accumulating into thick layers in a suitable geological environment, and buried in the bottom of water or sediment, after a long geological age of natural coalification. Among the geological periods in the world, the Carboniferous, Permian, Jurassic and Tertiary strata proce the most coal, which is an important coal forming age. The carbon content of coal is generally 46-97%, brown to black, with ll to metallic luster. According to the degree of coalification, coal can be divided into peat, lignite, bituminous coal and anthracite
in China, coal mining must be carried out according to law with complete and valid licenses. Implement the safety proction policy of "safety first, prevention first, comprehensive management".
4. First place in the list of ASIC mining machine manufacturer Langya: bitmain http://shop.bitmain.com/proct/main
bitmain, a mining equipment manufacturer from China, is currently the largest mining equipment manufacturer in the world. According to Wu Jihan, co-founder of bitcoin, bitmainland has more than 70% of the market share of bitcoin mining machines, and sells hundreds of thousands of ant miners every year, which is the company's main source of revenue
bitmainland's ant miner, ant pool and cloud computing power hashnest all rank first in the global market, and ant miner has almost no rival now. Ant miner S9 has become the most popular ASIC bitcoin miner in the world. Ant mining machine S9 is the first mining machine to use 16nm process chip, which was released in June 2016. It is equipped with bm1387 chip independently developed by bitcontinental, with a single-chip computing power of 74gh / s. According to the chip frequency difference, its S9 series includes procts from 9.5T to 14T, mainly core frequency and power consumption. It is still the mining machine with the highest rate of return since it was released, and it is also the mining machine with the largest computing power
the second place: Canaan creative
founded in 2013, Canaan creative is a supercomputer chip and digital blockchain computing equipment manufacturing, blockchain computing overall solution provider, and also the first company in the world to develop sha256 special computing equipment
The representative miner is Avalon miner741, which adopts Avalon self-developed a321288, 16nm process, and the calculation force is 7.3th/s. In addition, in order to rece the cost of procts, Avalon is one of the few manufacturers that do not have control circuits in top-level procts, and the basic threshold is relatively high. It needs additional controllers or raspberry pie, and it can work with auc3 converter and auc3 data linethird place: bitfury
bitfury. At present, its main procts are 16nm ASIC special mining chips. Bitfury does not sell mining machines directly to consumers, but mainly sells complete sets of data center equipment to enterprise users
Bitfury was founded in Russia in 2011, headquartered in Belgium, with management departments in San Francisco and Amsterdam, and data centers in Iceland and the Republic of Georgia. In the early days, he was an ASIC bitcoin miner chip R & D team, and now he is transforming into blockchain basic data service and transaction processing service5. There are clear requirements in article 373-375 of coal mine safety regulations, specifically as follows:
Article 373 when using roller driven belt conveyor for transportation, the following regulations shall be observed:
(1) flame retardant belt must be used. The flame retardant and antistatic properties of the non-metallic parts of the belt conveyor idler and the rubber of the rubber coated roller must meet the relevant regulations< (2) there should be sufficient lighting in the roadway
(3) anti skid protection of driving roller, coal stacking protection and anti deviation device must be installed< (4) temperature protection, smoke protection and automatic sprinkler should be installed< (5) the belt conveyor installed in the main transportation roadway must also be equipped with:
1
2. Protective fence at the head and tail of the machine to prevent personnel from contacting with the driving roller and guide roller< (6) the belt conveyor used in inclined shaft must be equipped with anti reversing device and braking device when it is transported upward; The braking device must be installed when transporting down< (7) it is strictly forbidden to use combustible transmission medium for hydraulic coupling (variable speed hydraulic coupling is not subject to this restriction)< (8) a bridge should be set at the place where pedestrians cross the belt conveyor in the roadway of belt conveyor< (9) the belt conveyor should be equipped with soft start device, and the downward belt conveyor should be equipped with soft brake device< (1) the following protective devices must be installed and inspected and tested regularly:
1
2. Over current and under voltage protection
3
4. Local overload protection of conveyor belt
5. When the wire rope tensioning car reaches the end point, the tensioning heavy hammer will fall to the ground for protection< (2) in inclined shaft, spring type or heavy hammer type brake must be installed, and the performance of brake shall meet the following requirements:
1. The ratio of braking torque to designed maximum static tension difference acting torque on brake wheel shall not be less than 2 or more than 3
2. The switch can be automatically applied in case of power failure or various protective devices
the following regulations shall be observed when using steel wire rope traction belt conveyor or steel wire rope core belt conveyor to transport personnel in the 375 roadway:
(1) the vertical distance from the conveyor belt to the top of the roadway shall not be less than 1.4 m in the 20 m section of up and down personnel, and the vertical distance in the driving section shall not be less than 1 m. When the downward belt is manned, the vertical distance between the upper and lower conveyor belts shall not be less than 1m
(2) the width of the conveyor belt shall not be less than 0.8m and the running speed shall not exceed 1.8m/s. The width from the belt groove to the belt edge of the steel wire rope traction belt conveyor shall not be less than 60mm< (3) the distance between passengers shall not be less than 4m. Passengers are not allowed to stand or lie on their backs. They should face the direction of travel. It is strictly forbidden to carry heavy and extra long objects, and touch the side of the conveyor belt
(4) platforms and lighting should be provided at the places where people get on and off. The length and width of the platform shall not be less than 5m and 0.8m respectively, with railings. There shall be no support or suspension device in the section where people are going up and down. There should be signs or sound and light signals at the place where people get off, and a safety device that can stop automatically must be set 2m in front of the end of the section where people get off. At the coal unloading port, there must be facilities to prevent personnel from falling into the coal bunker< (5) the material on the conveyor belt must be removed before transporting personnel< (6) it shall be equipped with an emergency stop device which can be operated by passengers or other personnel at any place along the whole length of the conveyor 7 The steel cord belt conveyor shall be equipped with belt breaking protection device.
Article 373 when using roller driven belt conveyor for transportation, the following regulations shall be observed:
(1) flame retardant belt must be used. The flame retardant and antistatic properties of the non-metallic parts of the belt conveyor idler and the rubber of the rubber coated roller must meet the relevant regulations< (2) there should be sufficient lighting in the roadway
(3) anti skid protection of driving roller, coal stacking protection and anti deviation device must be installed< (4) temperature protection, smoke protection and automatic sprinkler should be installed< (5) the belt conveyor installed in the main transportation roadway must also be equipped with:
1
2. Protective fence at the head and tail of the machine to prevent personnel from contacting with the driving roller and guide roller< (6) the belt conveyor used in inclined shaft must be equipped with anti reversing device and braking device when it is transported upward; The braking device must be installed when transporting down< (7) it is strictly forbidden to use combustible transmission medium for hydraulic coupling (variable speed hydraulic coupling is not subject to this restriction)< (8) a bridge should be set at the place where pedestrians cross the belt conveyor in the roadway of belt conveyor< (9) the belt conveyor should be equipped with soft start device, and the downward belt conveyor should be equipped with soft brake device< (1) the following protective devices must be installed and inspected and tested regularly:
1
2. Over current and under voltage protection
3
4. Local overload protection of conveyor belt
5. When the wire rope tensioning car reaches the end point, the tensioning heavy hammer will fall to the ground for protection< (2) in inclined shaft, spring type or heavy hammer type brake must be installed, and the performance of brake shall meet the following requirements:
1. The ratio of braking torque to designed maximum static tension difference acting torque on brake wheel shall not be less than 2 or more than 3
2. The switch can be automatically applied in case of power failure or various protective devices
the following regulations shall be observed when using steel wire rope traction belt conveyor or steel wire rope core belt conveyor to transport personnel in the 375 roadway:
(1) the vertical distance from the conveyor belt to the top of the roadway shall not be less than 1.4 m in the 20 m section of up and down personnel, and the vertical distance in the driving section shall not be less than 1 m. When the downward belt is manned, the vertical distance between the upper and lower conveyor belts shall not be less than 1m
(2) the width of the conveyor belt shall not be less than 0.8m and the running speed shall not exceed 1.8m/s. The width from the belt groove to the belt edge of the steel wire rope traction belt conveyor shall not be less than 60mm< (3) the distance between passengers shall not be less than 4m. Passengers are not allowed to stand or lie on their backs. They should face the direction of travel. It is strictly forbidden to carry heavy and extra long objects, and touch the side of the conveyor belt
(4) platforms and lighting should be provided at the places where people get on and off. The length and width of the platform shall not be less than 5m and 0.8m respectively, with railings. There shall be no support or suspension device in the section where people are going up and down. There should be signs or sound and light signals at the place where people get off, and a safety device that can stop automatically must be set 2m in front of the end of the section where people get off. At the coal unloading port, there must be facilities to prevent personnel from falling into the coal bunker< (5) the material on the conveyor belt must be removed before transporting personnel< (6) it shall be equipped with an emergency stop device which can be operated by passengers or other personnel at any place along the whole length of the conveyor 7 The steel cord belt conveyor shall be equipped with belt breaking protection device.
6. It is not allowed to use scraper conveyor to transport equipment, materials, etc., because it is not safe to take things from scraper trough under the premise of scraper thrust. If conditions permit, special belt conveyor can be laid to transport personnel, equipment or materials.
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8. Before the installation of belt conveyor: the belt conveyor shall be installed after the transfer tower and silo are completed. Note: all belt conveyors are installed and adjusted according to geological parameters and drawings. Installation work: check the civil construction with lines, check the condition of anchor bolts and embedded steel plates, check the position of various parts of belt conveyor, and install and adjust the equipment (including upper and lower idler, wiper, etc.) according to the installation truss of anchor bolts Driving device, etc.) installation of belt elevator installation of telescopic head installation of guide groove installation of tensioning device installation of all electrical parts support belt cutting and vulcanization connection work inspection before the end of installation: before the installation of belt, check whether the belt conveyor is consistent with the drawing and geological graphics parameters. Electrical part: installation of cable ct, installation of limit switch, protection device, electric control cabinet, lighting, laying of cable connection wire, painting: cleaning the damaged part of paint and repainting paint according to the requirements of technical specifications. Lubricating oil: add grease or lubricating oil to the following equipment according to the proceres specified in the lubricating oil operation manual: recer, coupling, crane, bearing pedestal, motor bearing, etc. Safety technical measures for the installation of belt conveyor in main haulage roadway. In order to ensure the construction safety of trackless flat transporter in transporting large parts such as belt head, tail, belt and installation work, the following safety technical measures are formulated
II. Overview of installation project
the laying of belt conveyor in main transport roadway includes: 1. Lower channel of 01 working face: one belt and two belts
2. Belt of north wing main haulage roadway
3. Main haulage roadway: one, two and three belts
4. South main transportation lane: one, two and three belts
5. Main shaft belt
6. Ground corridor belt
3. Preparation before belt conveyor installation:
1. Carefully check all supports, roof and sides of the roadway to ensure that the supports are in good condition
2. Transport the installation parts to the vicinity of the installation point according to the installation sequence
3. Check whether the installation tools are complete and reliable
4. Level the installation site and add base plate if necessary
5. Determine the installation center line of the conveyor according to the center line of the roadway, and mark it on the roof and floor
IV. installation sequence: No.1 and No.2 belts in the lower chute of working face 01—— The belt of the main haulage Lane in the north wing is one, two and three belts of the main haulage lane—— One, two and three belts in the south main transportation lane—— Main shaft belt surface corridor belt< The installation process is as follows:
1. According to the transfer condition of the head and its main transport equipment, after determining the position of the head drum, the guide chain is used to lift each large piece and main drum one by one and install them accordingly; After the main body of the machine head is installed, the unloading arm, the unloading roller, the cleaning device, the belt storage bin, the fixed turn back roller, the tension winch and the upper and lower idlers should be aligned and put on the conveyor belt
2. Installation of fuselage. First of all, the "H" frame rods are installed one by one in a straight line
horizontally along the roadway from front to back, and the bottom idler is installed at the same time. Then, unfold the conveyor belt on the other side of the roadway, and manually lift the conveyor belt to the bottom roller in the "H" frame. Install the
upper idler, and then manually lift the unfolded second layer conveyor belt onto the upper idler
3. Tail part installation. Determine the position of the tail base, fix the tail base, install the
tail frame, transfer machine slideway, buffer bracket, etc., and connect with the frame rod of the fuselage, thread the tail conveyor belt, and fasten and clamp all the conveyor belt interfaces with a nailing machine
4. Install the tail moving device (including special jack, small chain, longitudinal valve, sprocket, etc.) in the tail part< 6. Operation debugging:
1. Connect the power supply of the head motor and the tension winch motor
2. Inform the operators to avoid the belt conveyor and start the tension winch to tighten the belt
3. Add grease to the coupling, recer and oil filling holes as required
4. Clean the debris on and under the conveyor belt
5. Send the power on signal, and check whether each part is abnormal. If it is normal, the installation work is finished< 7. Safety precautions ring installation:
1. When unfolding the conveyor belt roll, the personnel must stand behind the unfolding direction and cooperate with each other to prevent the collision accident caused by someone in front
2. Pay attention not to collide with roadway support ring lifting and installation of large pieces. The installation personnel should pay attention to safety to prevent personal accidents such as parts squeezing and bumping
3. The head of the belt conveyor should be well fixed and reliable. When lifting large parts, good tools should be selected, and open anchor chain, lead wire and other objects are not allowed to be used as lifting tools
4. When manually lifting the equipment, it is necessary to ensure that the password is consistent, the pace is consistent, the lifting is light, and the exit road is cleared to ensure the smooth roadway. MT 654-1997 coal mine belt conveyor safety specification
preface
this standard is not equivalent to the general safety requirements of the international standard ISO 1819:1977 "continuous handling equipment - Safety specifications - General Provisions", and it is the first time to formulate the safety specification and standard of coal mine belt conveyor by combining with the characteristics of design and use of coal mine belt conveyor and special safety requirements in China In order to improve the safety performance of coal mine belt conveyor and prevent unnecessary accidents
this standard was proposed by the Department of science, technology and ecation of the Ministry of coal instry
this standard is under the jurisdiction of the technical committee of coal mine special equipment standardization of the Ministry of coal instry
this standard is drafted by Shanghai Branch of General Coal Research Institute
the main drafters of this standard are Li Yunhai, Chen Ji and Hou Hongwei
this standard is entrusted to Shanghai Branch of General Coal Research Institute for interpretation< This standard specifies the safety requirements for the design, manufacture, installation, use and maintenance of belt conveyors used in coal mines
this standard is mainly applicable to belt conveyors used in underground coal mines, and also applicable to belt conveyors used in open-pit coal mines, coal preparation and other workplaces with explosive hazards
2 references
the provisions contained in the following standards constitute the provisions of this standard by reference in this standard. At the time of publication, the editions indicated are valid. All standards will be revised. All parties using this standard shall explore the possibility of using the latest version of the following standards< GB 3836.1-83 General requirements for explosion proof electrical equipment for explosive atmospheres
GB 3836.2-83 explosion proof electrical equipment for explosive atmospheres "d"
GB 3836.3-83 explosion proof electrical equipment for explosive atmospheres "e"
GB 3836.4-83 explosion proof electrical equipment for explosive atmospheres intrinsically safe circuits and electrical equipment "I"
GB 3836.4-83 explosion proof electrical equipment for explosive atmospheres />GB / T 13561.3-92 safety code for port continuous handling equipment belt conveyor
MT 113-1995 general test method and judgment rule for flame retardant and antistatic properties of polymer procts used in underground coal mine
MT 147-1995 flame retardant and antistatic fabric whole core conveyor belt used in coal mine
MT 450-1995 test method and judgment rule for flame retardant and antistatic properties of steel cord conveyor belt used in coal mine
ZB d930 08-90 coal mine underground belt conveyor technical conditions
coal mine safety regulations, Ministry of energy of the people's Republic of China, 1992
3 definitions
this standard adopts the following definitions
3.1 normal working conditions. It is stipulated by the user and agreed by the manufacturer at the time of ordering, or it is stipulated by the manufacturer when printing standard proct samples
3.2 personnel
4 basic requirements
4.1 the design and use of conveyor should strictly comply with the provisions of coal mine safety regulations, and comply with the general safety regulations in GB / T 13561.3
4.2 the technical requirements of the conveyor should comply with ZB D93 008
4.3 the service conditions of the conveyor must meet its normal working conditions. For conveyors with special requirements, corresponding special safety rules shall be stipulated separately
4.4 conveyor procts and equipment shall comply with the provisions of coal mine safety signs
5 safety rules
5.1 in the design and manufacturing stage
5.1.1 the stability and strength of the conveyor under all normal working conditions should be ensured to ensure the reliability of the conveyor
5.1.2 on the whole conveyor line, especially at the loading, unloading or transfer points, it should be designed to prevent the overflow of the transported materials as much as possible, and appropriate st rection measures should be considered
5.1.3 the conveying angle of the conveyor should fully consider the characteristics of the conveying materials, so that the conveyor should not roll or spill under normal working conditions
5.1.4 the conveyor must use flame retardant conveyor belt, and its safety performance and technical requirements should meet the requirements of MT 147 and MT 450. For parts made of non-metallic materials, their safety performance shall comply with MT 113
5.1.5 the conveyor belt should be suitable for the specified conveying capacity and material width. If necessary, guide plate or centering device shall be installed at loading point or unloading point
5.1.6 the motor, electric control and protection equipment matched with the conveyor must comply with the provisions of GB 3836.1-3836.4, and have the explosion-proof certificate issued by the designated unit
5.1.7 the maximum surface temperature of any parts of the conveyor shall not exceed 150 ℃. During mechanical friction braking, there shall be no spark phenomenon
5.1.8 the conveyor must be equipped with skid, smoke, coal stacking, temperature protection and anti deviation, watering and other devices
5.1.9 the conveyor used in the main transportation roadway should be equipped with belt tension drop protection device and anti tearing protection device
5.1.10 when the length of the conveyor exceeds 100m, the emergency stop device along the conveyor sidewalk should be set
5.1.11 all inclined conveyors that may overspeed or reverse must be equipped with safe and reliable braking device or backstop device. The performance requirements of such devices shall comply with the provisions of 3.11 in ZB D93 008
5.1.12 when multiple mechanical backstops are used on one conveyor, if the load cannot be evenly shared, each backstop must meet the backstop distance required by the whole conveyor
5.1.13 the large size backstop driven by multiple motors should be installed on the output shaft or driving roller of the recer as far as possible
5.1.14 slow start and equal deceleration braking technology should be considered for fixed high-power conveyor to ensure that the starting (braking) acceleration (deceleration) of the conveyor is within the range of 0.1-0.3m/s2
5.1.15 combustible transmission medium is not allowed to be used in mine safety type and torque limiting type couplings. When using oil medium, the variable speed hydraulic coupling must ensure a good external circulation system and perfect over temperature protection measures, and hold the certificate of approval of the safety department of the Ministry of coal instry
5.1.16 the tensioning device shall ensure the tension required for starting, braking and normal operation of the conveyor
5.1.17 the conveyor electric control system shall have the functions of start-up warning (sound or light signal), start-up, stop, emergency stop, system interlocking and communication along the line
II. Overview of installation project
the laying of belt conveyor in main transport roadway includes: 1. Lower channel of 01 working face: one belt and two belts
2. Belt of north wing main haulage roadway
3. Main haulage roadway: one, two and three belts
4. South main transportation lane: one, two and three belts
5. Main shaft belt
6. Ground corridor belt
3. Preparation before belt conveyor installation:
1. Carefully check all supports, roof and sides of the roadway to ensure that the supports are in good condition
2. Transport the installation parts to the vicinity of the installation point according to the installation sequence
3. Check whether the installation tools are complete and reliable
4. Level the installation site and add base plate if necessary
5. Determine the installation center line of the conveyor according to the center line of the roadway, and mark it on the roof and floor
IV. installation sequence: No.1 and No.2 belts in the lower chute of working face 01—— The belt of the main haulage Lane in the north wing is one, two and three belts of the main haulage lane—— One, two and three belts in the south main transportation lane—— Main shaft belt surface corridor belt< The installation process is as follows:
1. According to the transfer condition of the head and its main transport equipment, after determining the position of the head drum, the guide chain is used to lift each large piece and main drum one by one and install them accordingly; After the main body of the machine head is installed, the unloading arm, the unloading roller, the cleaning device, the belt storage bin, the fixed turn back roller, the tension winch and the upper and lower idlers should be aligned and put on the conveyor belt
2. Installation of fuselage. First of all, the "H" frame rods are installed one by one in a straight line
horizontally along the roadway from front to back, and the bottom idler is installed at the same time. Then, unfold the conveyor belt on the other side of the roadway, and manually lift the conveyor belt to the bottom roller in the "H" frame. Install the
upper idler, and then manually lift the unfolded second layer conveyor belt onto the upper idler
3. Tail part installation. Determine the position of the tail base, fix the tail base, install the
tail frame, transfer machine slideway, buffer bracket, etc., and connect with the frame rod of the fuselage, thread the tail conveyor belt, and fasten and clamp all the conveyor belt interfaces with a nailing machine
4. Install the tail moving device (including special jack, small chain, longitudinal valve, sprocket, etc.) in the tail part< 6. Operation debugging:
1. Connect the power supply of the head motor and the tension winch motor
2. Inform the operators to avoid the belt conveyor and start the tension winch to tighten the belt
3. Add grease to the coupling, recer and oil filling holes as required
4. Clean the debris on and under the conveyor belt
5. Send the power on signal, and check whether each part is abnormal. If it is normal, the installation work is finished< 7. Safety precautions ring installation:
1. When unfolding the conveyor belt roll, the personnel must stand behind the unfolding direction and cooperate with each other to prevent the collision accident caused by someone in front
2. Pay attention not to collide with roadway support ring lifting and installation of large pieces. The installation personnel should pay attention to safety to prevent personal accidents such as parts squeezing and bumping
3. The head of the belt conveyor should be well fixed and reliable. When lifting large parts, good tools should be selected, and open anchor chain, lead wire and other objects are not allowed to be used as lifting tools
4. When manually lifting the equipment, it is necessary to ensure that the password is consistent, the pace is consistent, the lifting is light, and the exit road is cleared to ensure the smooth roadway. MT 654-1997 coal mine belt conveyor safety specification
preface
this standard is not equivalent to the general safety requirements of the international standard ISO 1819:1977 "continuous handling equipment - Safety specifications - General Provisions", and it is the first time to formulate the safety specification and standard of coal mine belt conveyor by combining with the characteristics of design and use of coal mine belt conveyor and special safety requirements in China In order to improve the safety performance of coal mine belt conveyor and prevent unnecessary accidents
this standard was proposed by the Department of science, technology and ecation of the Ministry of coal instry
this standard is under the jurisdiction of the technical committee of coal mine special equipment standardization of the Ministry of coal instry
this standard is drafted by Shanghai Branch of General Coal Research Institute
the main drafters of this standard are Li Yunhai, Chen Ji and Hou Hongwei
this standard is entrusted to Shanghai Branch of General Coal Research Institute for interpretation< This standard specifies the safety requirements for the design, manufacture, installation, use and maintenance of belt conveyors used in coal mines
this standard is mainly applicable to belt conveyors used in underground coal mines, and also applicable to belt conveyors used in open-pit coal mines, coal preparation and other workplaces with explosive hazards
2 references
the provisions contained in the following standards constitute the provisions of this standard by reference in this standard. At the time of publication, the editions indicated are valid. All standards will be revised. All parties using this standard shall explore the possibility of using the latest version of the following standards< GB 3836.1-83 General requirements for explosion proof electrical equipment for explosive atmospheres
GB 3836.2-83 explosion proof electrical equipment for explosive atmospheres "d"
GB 3836.3-83 explosion proof electrical equipment for explosive atmospheres "e"
GB 3836.4-83 explosion proof electrical equipment for explosive atmospheres intrinsically safe circuits and electrical equipment "I"
GB 3836.4-83 explosion proof electrical equipment for explosive atmospheres />GB / T 13561.3-92 safety code for port continuous handling equipment belt conveyor
MT 113-1995 general test method and judgment rule for flame retardant and antistatic properties of polymer procts used in underground coal mine
MT 147-1995 flame retardant and antistatic fabric whole core conveyor belt used in coal mine
MT 450-1995 test method and judgment rule for flame retardant and antistatic properties of steel cord conveyor belt used in coal mine
ZB d930 08-90 coal mine underground belt conveyor technical conditions
coal mine safety regulations, Ministry of energy of the people's Republic of China, 1992
3 definitions
this standard adopts the following definitions
3.1 normal working conditions. It is stipulated by the user and agreed by the manufacturer at the time of ordering, or it is stipulated by the manufacturer when printing standard proct samples
3.2 personnel
4 basic requirements
4.1 the design and use of conveyor should strictly comply with the provisions of coal mine safety regulations, and comply with the general safety regulations in GB / T 13561.3
4.2 the technical requirements of the conveyor should comply with ZB D93 008
4.3 the service conditions of the conveyor must meet its normal working conditions. For conveyors with special requirements, corresponding special safety rules shall be stipulated separately
4.4 conveyor procts and equipment shall comply with the provisions of coal mine safety signs
5 safety rules
5.1 in the design and manufacturing stage
5.1.1 the stability and strength of the conveyor under all normal working conditions should be ensured to ensure the reliability of the conveyor
5.1.2 on the whole conveyor line, especially at the loading, unloading or transfer points, it should be designed to prevent the overflow of the transported materials as much as possible, and appropriate st rection measures should be considered
5.1.3 the conveying angle of the conveyor should fully consider the characteristics of the conveying materials, so that the conveyor should not roll or spill under normal working conditions
5.1.4 the conveyor must use flame retardant conveyor belt, and its safety performance and technical requirements should meet the requirements of MT 147 and MT 450. For parts made of non-metallic materials, their safety performance shall comply with MT 113
5.1.5 the conveyor belt should be suitable for the specified conveying capacity and material width. If necessary, guide plate or centering device shall be installed at loading point or unloading point
5.1.6 the motor, electric control and protection equipment matched with the conveyor must comply with the provisions of GB 3836.1-3836.4, and have the explosion-proof certificate issued by the designated unit
5.1.7 the maximum surface temperature of any parts of the conveyor shall not exceed 150 ℃. During mechanical friction braking, there shall be no spark phenomenon
5.1.8 the conveyor must be equipped with skid, smoke, coal stacking, temperature protection and anti deviation, watering and other devices
5.1.9 the conveyor used in the main transportation roadway should be equipped with belt tension drop protection device and anti tearing protection device
5.1.10 when the length of the conveyor exceeds 100m, the emergency stop device along the conveyor sidewalk should be set
5.1.11 all inclined conveyors that may overspeed or reverse must be equipped with safe and reliable braking device or backstop device. The performance requirements of such devices shall comply with the provisions of 3.11 in ZB D93 008
5.1.12 when multiple mechanical backstops are used on one conveyor, if the load cannot be evenly shared, each backstop must meet the backstop distance required by the whole conveyor
5.1.13 the large size backstop driven by multiple motors should be installed on the output shaft or driving roller of the recer as far as possible
5.1.14 slow start and equal deceleration braking technology should be considered for fixed high-power conveyor to ensure that the starting (braking) acceleration (deceleration) of the conveyor is within the range of 0.1-0.3m/s2
5.1.15 combustible transmission medium is not allowed to be used in mine safety type and torque limiting type couplings. When using oil medium, the variable speed hydraulic coupling must ensure a good external circulation system and perfect over temperature protection measures, and hold the certificate of approval of the safety department of the Ministry of coal instry
5.1.16 the tensioning device shall ensure the tension required for starting, braking and normal operation of the conveyor
5.1.17 the conveyor electric control system shall have the functions of start-up warning (sound or light signal), start-up, stop, emergency stop, system interlocking and communication along the line
9. First synthesize a tramcar
empty
empty
iron
iron
iron
iron
iron
iron = ingot
then synthesize a furnace
and then synthesize a power tramcar
empty
furnace
car
furnace = furnace
car = tramcar
put it in the synthesis table and item bar, and then right click the power tramcar with charcoal or coal in hand Is to use, can let the miner go forward, push the miner in front or transport miner
empty
empty
iron
iron
iron
iron
iron
iron = ingot
then synthesize a furnace
and then synthesize a power tramcar
empty
furnace
car
furnace = furnace
car = tramcar
put it in the synthesis table and item bar, and then right click the power tramcar with charcoal or coal in hand Is to use, can let the miner go forward, push the miner in front or transport miner
10. Single chain, double chain, common type, reinforced type, etc., generally used are 17 type, 30 type, 40 type and reinforced type, and 630 type, etc., which are used in coal mines or mines with large output.
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