Solving the problems of high-quality development of the coal industry with technological innovation

"Faced with the new situation of the energy revolution and the new requirements for the high-quality development of the industry, the coal industry now needs to strengthen technological innovation more than ever, and it needs to use systematic thinking to plan and coordinate the future development of coal technological innovation from multiple aspects

Liu Feng said that from a realistic point of view, the coal industry is facing a green, low-carbon transition and high-quality development requirements, and it needs scientific and technological innovation to provide development impetus; from a future point of view, it is necessary to conform to the trend of the energy revolution and promote the transformation of coal from traditional energy to clean energy.

New situation brings new challenges

"China's coal resources more than 1,000 meters deep account for more than 53% of the total coal resources.

Wu Qiang, academician of the Chinese Academy of Engineering, believes that due to the gradual exhaustion of the easy-to-mine resources of shallow and upper coals, the hard-to-mine and hard-to-eat “hard bones” of shallow or upper coals and the development of deep coal and lower coal resources have become the current mining areas in eastern China.

As the mining depth increases, some coal mines evolve from low gas to high gas outburst, from non-burst rock pressure hazard to weak impact or strong impact, hydrogeological types evolve from simple to complex or extremely complex, and the difficulty of disaster prevention and control continues to increase.

According to Wu Qiang, with the increase in the number of mines in the Northwest Coalfield and the western mines of the North China Coalfield, the expansion of mining scale, and the increase in mining intensity, the number of large-water mines has gradually increased

In addition to water damage, gas governance cannot be ignored

Play the supporting role of science and technology

　　Shandong Energy Group divides the rock burst types into three categories based on the characteristics of the strata: deep buried huge thick topsoil and thin bedrock high vertical stress shock type, deep buried high huge thick and hard roof shock type, deep buried low hard roof (direct roof missing ) Impact type
.

　　"A deep understanding of the essential differences between deep mining and shallow mining in terms of pressure characteristics and stress field distribution, etc.
, starting from adjusting the production layout of the mine, vigorously promoting the application of small coal pillars, no coal pillars, and coal pillars along the trenches and adjacent working faces.
Negative coal pillar roadway protection technology; prioritize the arrangement of wide working faces where conditions permit; when mining multiple coal seams, the lower coal face does not cross the upper coal face along the trench, cut-off and stop lines, and the upper coal mining shall not be formed for the lower coal mining The coal pillar areas that cause difficulties, etc.
, explore the formation of a deep mine mine burst prevention and control plan
.
" Meng Xiangjun said
.

　　China Pingmei Shenma Group has innovatively applied technologies such as "drilling-punching-cutting" coupling pressure relief and penetration enhancement, unconventional protection layer mining, tree-shaped drilling, and unified forecasting and prevention of compound dynamic disasters, etc.
, to achieve rapid and effective control of gas.
Good
.
The group has explored and formed a new model of gas-power-refrigeration resource recycling.
The gas drainage volume has increased from less than 30 million cubic meters in 2000 to 170 million cubic meters in 2020
.

　　“In the next step, we will focus on theoretical and technical problems such as the law of gas migration and enrichment in deep low-permeability coal seams, and the grading and utilization of gas extracted from different concentrations
.
” said Zhang Jianguo, deputy general manager of China Pingmei Shenma Group
.

　　Yuan Liang believes that it is necessary to study the basic theories and key technologies of low-concentration gas purification, conversion and utilization, develop system dynamic control and monitoring and early warning devices, solve technical problems in the safe and efficient comprehensive utilization of low-concentration gas, and promote the green, intelligent and healthy development of China's energy resources.

.

　　Facing the prevention and control of water hazards, Wu Qiang proposed to adopt the theory and technology of "coal-water" dual-resource coordinated mining to strengthen the research on the natural and social attributes of water.
Environmental protection "trinity" optimized combination method; mines with poor sparseness and no need for water users adopt the "trinity" optimized combination method of mine groundwater control, utilization, and ecological and environmental protection; mines with recharge conditions can use mine water control, treatment, and utilization , Recharge, ecological and environmental protection "five in one" optimized combination mode and method
.
(Reporter Xie Jidong, Zhang Ying, correspondent Liang Wei)

Transfer from: China Coal News