Do you want to go to Siping central hospital now
Publish: 2021-05-25 08:04:28
1. As long as it is low-risk areas to go to the hospital for physical examination is not necessary to do nucleic acid, but if hospitalized, you need to do nucleic acid testing
2. It can be repaired, but there is no need to repair it. Just replace a motor
earlier, the coil was burned out and was rewound for repair, because the labor cost was low and the motor price was relatively high. Now the price of motor is relatively low, and the labor cost is too high, so no one is rewinding the coil to repair the fan. They all replace the motor or even the fan directly.
earlier, the coil was burned out and was rewound for repair, because the labor cost was low and the motor price was relatively high. Now the price of motor is relatively low, and the labor cost is too high, so no one is rewinding the coil to repair the fan. They all replace the motor or even the fan directly.
3. Aging of capacitor or fan motor coil. Try to replace the capacitor first. If it is OK, there will be no problem with the coil. If it still doesn't work, it's time to rewind the coil.
4. The most important thing is that the motor grade you use is not enough. You can't use it under high temperature. One is the insulation level of enameled wire, and the other is that the internal structure of your motor is not suitable for high temperature operation.
5. Unknown_Error
6. Certainly, after installing the graphics driver, the system will remind you to restart the computer, so that after the restart, the graphics card will load the features of the new driver, and the driver will give the best support to the graphics card
if you don't restart, you won't use the new graphics card with new features. The graphics card still works under the support of the old driver.
if you don't restart, you won't use the new graphics card with new features. The graphics card still works under the support of the old driver.
7.
Articles on mining engineering can be published in mining engineering. The original papers or comments are related to but not limited to the following fields: mining engineering technology, mine geology, mine design, mine surface engineering, shaft engineering, mining engineering, miner selection, drilling engineering, oil and gas well development engineering, oil and gas storage and transportation engineering, Mine mechanical engineering, mine electrical engineering, mining environmental engineering, mine safety, mine comprehensive utilization engineering, mine engineering technology and other fields
8. This is our company. Go to the labor bureau and sue them
9. 1、 The significance of new mining technology in township coal mines
under the new situation of today's science and technology and economic development and the needs of local coal mine development, the reform of small coal mining technology must face the main battlefield of economic construction, be based on the forefront of coal mining technology, be based on the necessary technical reserves for China's coal development strategy, and be based on the solution of practical problems of coal instrial engineering, Only by focusing on medium and long-term research and development and technical reserves, tracking the forefront of Instrial Science and technology, and taking coal mining technology and supporting equipment as the leading core technology, and occupying the commanding height of technology, can we survive and develop. Therefore, the application of new mining technology in small coal mines will be more and more extensive and show its importance< In many areas, e to the small proction capacity of township coal mines, complex geological structure, great changes in the occurrence of coal seams, and many of them are steeply inclined coal seams and thin coal seams, which bring great difficulties to mining. Therefore, it is more important to research and develop new mining technologies to improve the high yield and efficiency of mines. In small township coal mines, the single longwall mining method has become mature, and the main development methods are top coal caving mining technology, pseudo inclined flexible shield support mining method and small stage blasting coal caving mining method in steep seam
1. Blasting top coal caving mining technology (1) sliding support top coal caving mining method: the sliding top beam is composed of top beam and pillar, the front beam and the rear beam are connected by the top beam and the front beam spring steel or guide groove, and the pillar of the support is hydraulic single column, the number of which varies from 2 to 5. It is connected with the top beam by a pin shaft. In addition, a probe beam or a cantilever beam can be installed at the front end of the front beam, and a tail beam can be installed at the rear end of the rear beam. The sliding top beam bracket is safe and reliable, self movable, light in weight, simple in structure, easy to disassemble and install, low in cost and strong in adaptability. It is widely used in small and medium-sized coal mines. The thickness of coal seams mined by this method is more than 5m, mainly inclined and steeply inclined coal seams. The length of working face is generally 60-80m, the longest is 105m, the mining height is usually 5-10m, and the working face cycle progress is 0.8m. The main problems of sliding support mining are low initial support force and working resistance and poor stability 2) Top coal caving mining with 2-type steel beam: the upper face of top coal caving mining with 2-type steel beam is supported by 2-type steel beam and single hydraulic prop, and the working face is set up by blasting, artificial net breaking and coal caving. It is better to use in the area and township coal mine where the occurrence condition of coal seam changes greatly or the technical level is low. Single hydraulic props with two type beams are used to support the shed. Each pair of shed has five props, and the main beam is one beam and three columns. The auxiliary beam is one beam and two columns. The spacing between the main beam and the auxiliary beam is 150 mm, and that between the two sheds is 600 mm. The maximum control distance is 3.4m, and the minimum control distance is 2.4m. Blasting is adopted to drop coal and double row holes are generally arranged. Move the main beam in time after shooting. We need to build temporary support. Support in time and load coal after blasting. Flexible scraper box conveyor and belt conveyor are used in working face conveyor. With the removal of auxiliary beam and top coal caving, the roof graally subsides and collapses naturally to complete the caving work. Sublevel and multi wheel operation mode is adopted for top coal caving, and the coal caving opening is arranged about 0.3m-0.5m above the scraper conveyor. The top coal caving quantity is controlled by manual plugging. The top coal shall be fully discharged at intervals for many times, and the skew shed beam shall be adjusted in time after coal drawing to ensure the strong support and firm top wall. If necessary, prop up to reinforce and block the fighter
2. Pseudo inclined flexible shield support mining method: the pseudo inclined flexible shield support mining method makes the working face dip angle gentle and the working face longer. From the face to the long wall mining method, the roadway layout and proction system are simple and the tunneling rate is low. This mining method uses the shield support to separate the working space from the goaf, It greatly simplifies the management of complex roof, creates good conditions for safe proction, and reces the labor intensity. The pseudo inclined flexible shield support mining method is generally suitable for mining with inclined angle greater than India
the coal seam with thickness of 2-6m has stable reservoir management and little change in coal seam thickness. The section height of this mining method depends on the size of the coal seam dip angle, the change along the dip angle and the mining technical conditions. Generally, it is about 30m. When the coal seam has good occurrence conditions and simple structure, it can be increased to 40m-60m. In the process of mining, the support is continuously extended in the return air roadway, and the support is continuously removed in the inlet air roadway. When the working face is pushed up to the mountain near the mining area, set up the recovery eyes, graally lower the support to a horizontal position, and then recover all the support. The structure of shield support: the length of steel beam is 3.0-3.2m, the specification of steel beam shall be selected according to the width of support, and the steel rope can be used with old steel rope with diameter of 20-30mm, and the length of steel rope is about 20-30m. The number of steel ropes shall be determined according to the width of the support. 2-3 steel ropes shall be used when the width is less than 3m, and 5-6 steel ropes shall be used when the width is more than 3m. 2-3 bamboo fences are set on the steel beam
3. Small stage blasting coal caving mining method: small stage blasting coal caving mining method is a coal mining method that divides the coal body in a section into several small sections for mining (no personnel, no equipment and no support). Small stage blasting coal caving mining method is generally suitable for mining irregular coal seams with dip angle greater than 400, thickness of 3.5-7.5m, roof and floor not easy to slide, and low gas mines. Its characteristics: good safety, simple mining technology, high efficiency, but low recovery rate, complex ventilation system, difficult air distribution. Coal dropping method: electric coal drill is used for drilling and blasting in the small drift, and each section of the blast hole is drilled and detonated once. Roof management: cut the top coal pillar every 30 m along the advancing direction of the mining face, and support 20 m in advance in the transportation roadway and return air roadway< Coal plough mining method: plough mining technology is the first successful medium and thin coal seam mining technology, which greatly improves the coal proction efficiency. The cutting speed of the plough can reach 3m / s, and the cutting power is more than 2X400Kw. According to the hardness of coal, the cutting depth of each knife can reach 250mm. At present, the intelligent driving system and reliable support control system are used in the working face conveyor and plough, all of which are concive to the realization of all automation of working face mining. Plough mining system is very simple. The plough body is pulled by a endless rope and slides along the guide rail to cut coal from the end of the working face. The guide rail is welded on the conveyor of the flexible loading working face. Different from the drum shearer, the planer is "leveled" according to the plane of the flexible loading conveyor, so it does not need a special person to be responsible for this work in the working face. The pushing process of the flexible loading conveyor is controlled by the electric control device. In addition, the moving process of the support also realizes automatic control, safe and reliable. All these realize the automation of the whole mining system. The coal plough (i.e. base plate coal plough) is used for mining ultra thin coal seam, and the minimum mining thickness can reach 0.6m. The coal plough guide rail and its accessories near the goaf side are welded on the conveyor of PF4 working face, which can achieve higher stability and facilitate maintenance and operation. The upper guide allows quick access to the upper and lower planing chains, while the reinforced bottom guide is made of high quality structural keys. In order to prevent proction rection, st generation and parts wear, an effective plough level control system is installed to adapt to the changes of various unlating coal seams< Conclusion:
small coal mines have backward mining technology, poor safety conditions and low resource recovery. It is of positive significance for the state to implement the technical policy of closing small coal mines, eliminating backward proction technology and equipment, improving the average single well scale, developing mechanized and semi mechanized mining technology and equipment for small coal mines, improving the mining methods and techniques for small coal mines, and improving the unit yield and work efficiency of coal mining face
for reference only
under the new situation of today's science and technology and economic development and the needs of local coal mine development, the reform of small coal mining technology must face the main battlefield of economic construction, be based on the forefront of coal mining technology, be based on the necessary technical reserves for China's coal development strategy, and be based on the solution of practical problems of coal instrial engineering, Only by focusing on medium and long-term research and development and technical reserves, tracking the forefront of Instrial Science and technology, and taking coal mining technology and supporting equipment as the leading core technology, and occupying the commanding height of technology, can we survive and develop. Therefore, the application of new mining technology in small coal mines will be more and more extensive and show its importance< In many areas, e to the small proction capacity of township coal mines, complex geological structure, great changes in the occurrence of coal seams, and many of them are steeply inclined coal seams and thin coal seams, which bring great difficulties to mining. Therefore, it is more important to research and develop new mining technologies to improve the high yield and efficiency of mines. In small township coal mines, the single longwall mining method has become mature, and the main development methods are top coal caving mining technology, pseudo inclined flexible shield support mining method and small stage blasting coal caving mining method in steep seam
1. Blasting top coal caving mining technology (1) sliding support top coal caving mining method: the sliding top beam is composed of top beam and pillar, the front beam and the rear beam are connected by the top beam and the front beam spring steel or guide groove, and the pillar of the support is hydraulic single column, the number of which varies from 2 to 5. It is connected with the top beam by a pin shaft. In addition, a probe beam or a cantilever beam can be installed at the front end of the front beam, and a tail beam can be installed at the rear end of the rear beam. The sliding top beam bracket is safe and reliable, self movable, light in weight, simple in structure, easy to disassemble and install, low in cost and strong in adaptability. It is widely used in small and medium-sized coal mines. The thickness of coal seams mined by this method is more than 5m, mainly inclined and steeply inclined coal seams. The length of working face is generally 60-80m, the longest is 105m, the mining height is usually 5-10m, and the working face cycle progress is 0.8m. The main problems of sliding support mining are low initial support force and working resistance and poor stability 2) Top coal caving mining with 2-type steel beam: the upper face of top coal caving mining with 2-type steel beam is supported by 2-type steel beam and single hydraulic prop, and the working face is set up by blasting, artificial net breaking and coal caving. It is better to use in the area and township coal mine where the occurrence condition of coal seam changes greatly or the technical level is low. Single hydraulic props with two type beams are used to support the shed. Each pair of shed has five props, and the main beam is one beam and three columns. The auxiliary beam is one beam and two columns. The spacing between the main beam and the auxiliary beam is 150 mm, and that between the two sheds is 600 mm. The maximum control distance is 3.4m, and the minimum control distance is 2.4m. Blasting is adopted to drop coal and double row holes are generally arranged. Move the main beam in time after shooting. We need to build temporary support. Support in time and load coal after blasting. Flexible scraper box conveyor and belt conveyor are used in working face conveyor. With the removal of auxiliary beam and top coal caving, the roof graally subsides and collapses naturally to complete the caving work. Sublevel and multi wheel operation mode is adopted for top coal caving, and the coal caving opening is arranged about 0.3m-0.5m above the scraper conveyor. The top coal caving quantity is controlled by manual plugging. The top coal shall be fully discharged at intervals for many times, and the skew shed beam shall be adjusted in time after coal drawing to ensure the strong support and firm top wall. If necessary, prop up to reinforce and block the fighter
2. Pseudo inclined flexible shield support mining method: the pseudo inclined flexible shield support mining method makes the working face dip angle gentle and the working face longer. From the face to the long wall mining method, the roadway layout and proction system are simple and the tunneling rate is low. This mining method uses the shield support to separate the working space from the goaf, It greatly simplifies the management of complex roof, creates good conditions for safe proction, and reces the labor intensity. The pseudo inclined flexible shield support mining method is generally suitable for mining with inclined angle greater than India
the coal seam with thickness of 2-6m has stable reservoir management and little change in coal seam thickness. The section height of this mining method depends on the size of the coal seam dip angle, the change along the dip angle and the mining technical conditions. Generally, it is about 30m. When the coal seam has good occurrence conditions and simple structure, it can be increased to 40m-60m. In the process of mining, the support is continuously extended in the return air roadway, and the support is continuously removed in the inlet air roadway. When the working face is pushed up to the mountain near the mining area, set up the recovery eyes, graally lower the support to a horizontal position, and then recover all the support. The structure of shield support: the length of steel beam is 3.0-3.2m, the specification of steel beam shall be selected according to the width of support, and the steel rope can be used with old steel rope with diameter of 20-30mm, and the length of steel rope is about 20-30m. The number of steel ropes shall be determined according to the width of the support. 2-3 steel ropes shall be used when the width is less than 3m, and 5-6 steel ropes shall be used when the width is more than 3m. 2-3 bamboo fences are set on the steel beam
3. Small stage blasting coal caving mining method: small stage blasting coal caving mining method is a coal mining method that divides the coal body in a section into several small sections for mining (no personnel, no equipment and no support). Small stage blasting coal caving mining method is generally suitable for mining irregular coal seams with dip angle greater than 400, thickness of 3.5-7.5m, roof and floor not easy to slide, and low gas mines. Its characteristics: good safety, simple mining technology, high efficiency, but low recovery rate, complex ventilation system, difficult air distribution. Coal dropping method: electric coal drill is used for drilling and blasting in the small drift, and each section of the blast hole is drilled and detonated once. Roof management: cut the top coal pillar every 30 m along the advancing direction of the mining face, and support 20 m in advance in the transportation roadway and return air roadway< Coal plough mining method: plough mining technology is the first successful medium and thin coal seam mining technology, which greatly improves the coal proction efficiency. The cutting speed of the plough can reach 3m / s, and the cutting power is more than 2X400Kw. According to the hardness of coal, the cutting depth of each knife can reach 250mm. At present, the intelligent driving system and reliable support control system are used in the working face conveyor and plough, all of which are concive to the realization of all automation of working face mining. Plough mining system is very simple. The plough body is pulled by a endless rope and slides along the guide rail to cut coal from the end of the working face. The guide rail is welded on the conveyor of the flexible loading working face. Different from the drum shearer, the planer is "leveled" according to the plane of the flexible loading conveyor, so it does not need a special person to be responsible for this work in the working face. The pushing process of the flexible loading conveyor is controlled by the electric control device. In addition, the moving process of the support also realizes automatic control, safe and reliable. All these realize the automation of the whole mining system. The coal plough (i.e. base plate coal plough) is used for mining ultra thin coal seam, and the minimum mining thickness can reach 0.6m. The coal plough guide rail and its accessories near the goaf side are welded on the conveyor of PF4 working face, which can achieve higher stability and facilitate maintenance and operation. The upper guide allows quick access to the upper and lower planing chains, while the reinforced bottom guide is made of high quality structural keys. In order to prevent proction rection, st generation and parts wear, an effective plough level control system is installed to adapt to the changes of various unlating coal seams< Conclusion:
small coal mines have backward mining technology, poor safety conditions and low resource recovery. It is of positive significance for the state to implement the technical policy of closing small coal mines, eliminating backward proction technology and equipment, improving the average single well scale, developing mechanized and semi mechanized mining technology and equipment for small coal mines, improving the mining methods and techniques for small coal mines, and improving the unit yield and work efficiency of coal mining face
for reference only
10. On December 4, 2012, the lowest price of this stock was 1.56 yuan (former right recovery). When it reached the highest price of 132.47 yuan last year, it rose 85 times. At present, the stock price is 40.19. I don't mean that this ticket will not rise in the future, but I think it's better to hold it for the long term or choose not to increase so much. If I do this stock, I will choose band operation.
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