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采用相似材料模拟实验方法,对淮北矿业集团朔里煤矿极近距离煤层上行开采的可行性进行研究。研究表明:上覆3煤的开采对4煤未造成破坏;下伏5煤开采后形成的冒落带高度约7.7 m,4煤处于5煤开采后形成的裂缝带下位,在层间岩性、软硬岩互层结构和垮落矸石的联合作用下,4煤整体保持连续和完整,仅在5煤采空区边界上方小范围内出现纵向台阶下沉,在采取一定安全措施后不影响4煤开采,因此该矿上行开采4煤是可行的。
The feasibility of the ascending coal mining in Shuoli coal mine of Huaibei Mining Group was researched with similar materials simulation experiment method. The results show that the mining of overlying 3 coal does not cause any damage to 4 coal; the height of the caving zone formed after 5 coal mining is about 7.7 m, the 4 coal is under the fracture zone formed after 5 coal mining, , The interaction between soft and hard rock interbedded structure and collapsed gangue, the 4 coal as a whole to maintain a continuous and complete, only 5 small coal mined area within the boundaries of a small longitudinal subsidence, to take certain safety measures does not affect 4 coal mining, so the ore mining 4 coal is feasible.