The test of the complete set of technical equipment for the extra-thick coal seam was successful, and the relevant projects have been declared to be publicized by the National Science and Technology Progress Award.
How to control the surrounding rock of extra-thick coal seams and extra-large mining space? How to support the roadway with severe roofing, large section and strong mining to cause severe deformation? How to control the unbalanced gas in the extra-mining goaf? What kind of process can be used to improve resource recovery rate and achieve safe and efficient mining? In recent years, with the successful promotion and application of complete sets of technology and equipment research and development projects for large-scale high-level fully mechanized caving mining in special thick coal seams, Tongmei Group successfully solved the problem of worldwide coal mining in the mining of extra-thick coal seams of 14 meters or more. Currently, the project has been declared the 2014 National Science and Technology Progress Award and has been publicized.
As the country's largest thermal coal base, with the long-term mining, the reserves of high-quality Jurassic coal measures have gradually decreased, and the mining positions of the same coal group have gradually shifted to the Carboniferous coal system. The Carboniferous coal seam in Datong mining area has large thickness and complex structure, and the average coal seam thickness is about 18 meters. The traditional mining technology can not meet the production needs. To this end, 15 coal research institutes and equipment manufacturers, such as China Coal Group, China Coal Corporation and Shanxi Pingyang Machinery Plant, jointly undertake the major project of the 11th Five-Year National Science and Technology Support Program - Extra Thick Coal Seam The research on complete sets of technology and equipment for large-scale high-level fully mechanized caving mining is the largest scientific research project undertaken by the coal system since the founding of New China.
With the strong support of the Ministry of Science and Technology, China Coal Industry Association and other departments and units, Tongmei Group adheres to independent innovation and overcomes many technical problems. The complete set of technology and equipment research and development projects for large-scale coal mining and fully mechanized caving mining in special coal seams are in the same coal tower mountain. The 8105 working face of coal mine was successfully tested and successfully achieved. The average thickness of coal seam was 18.44 meters, the average operating rate of working equipment was 92.1%, the monthly output was 907,600 tons, the highest monthly output was 1.035 million tons, the recovery rate was 88.9%, and the annual output was 1084.9. Ten thousand tons, the realization of gas zero overrun, no casualties accident, this is another major advancement in coal technology and equipment manufacturing after China successfully developed an annual output of 6 million tons of fully mechanized complete sets of technical equipment, marking China's 10 million tons of mines And the development of complete sets of technical equipment for 10 million tons of working face has entered the stage of industrial trial and demonstration implementation.
Subsequently, the technical achievements were promoted and applied in the mines such as Tongmei Group and Majialiang. The annual output of single wells in Tongyu Mine reached 12.87 million tons. Compared with stratified mining, from 2011 to 2013, a total of 80.299 million tons of raw coal was added, with an added value of 25.1 billion yuan, a new profit and tax of 7 billion yuan, a saving investment of 650 million yuan, and a saving project investment of 1.296 billion yuan. According to reports, the complete technology and equipment research and development project for large-scale high-level fully mechanized caving mining in extra-thick coal seams effectively solved the technical problems of high-yield, high-efficiency, high-recovery and safe mining in the country's extra-thick coal seams, and filled the technical gap of domestic extra-thick coal seam mining. During the project development process, 22 patents were granted, 61 utility model patents were established, 15 industry standards were formulated, 6 monographs were published, and 237 related articles were published. From mining to technical equipment, they have independent intellectual property rights and reached international leading level. .
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