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有些煤矿在研究工艺和改进传统工艺的基础上可以实现包括减少井工采煤的矸石量的小边角煤的经济回采。 因此,提高煤的回采率(目前全矿井的残存煤量和可采煤柱超过平衡表内储量的22％以上)、减少矿井的出矸量(每采出1000t煤,运到地面的矸石达1400t)、充分利用以矿井涌出的瓦斯(每年涌出量为100亿立米,只利用20％)以及天然气的热能(每年2730～3150亿焦耳)是改善自然资源的综合利用和加强自然环境保护的重要工艺因素。 在开采顿巴斯急倾煤层的各矿井中,提高残留煤的回采量和将巷道掘出的和巷道维修用的矸石留在井下是边角煤回采工艺的环节之一。
Some mines, on the basis of researching processes and improving traditional processes, can realize economical recovery of small corner coal, including reducing the amount of gangue mined in well workings. Therefore, to improve the recovery rate of coal (currently, the remaining coal reserves of all mines and coal pillars can exceed 22% of reserves in the balance sheet), reduce the amount of coal mined in coal mines (1000t of coal per mined, 1400t), making full use of the gas emitted by the mine (10 billion cubic meters of emission per year and only 20% utilization) and the thermal energy of natural gas (2730 ~ 315 billion joules per year) to improve the comprehensive utilization of natural resources and strengthen the protection of the natural environment The important process factor. One of the links in the recovery process of edge coal mining is to increase the amount of residual coal recovered and mine excavated and roadway maintenance waste rock are left downhole.