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采用数值模拟的方法,针对南屯煤矿93下05工作面上覆及侧向采空复杂条件下多工作面相继采空的复杂地质条件,对多工作面开采下93下05工作面沿空侧围岩结构的动态演化过程进行了研究,得出基于南屯煤矿的近距离煤层多工作面开采后的沿空侧相应的围岩结构动态演化规律:93下07工作面回采后,93下07采空区下帮侧6 m范围内围岩以碎裂结构为主,沿空巷道附近其他位置以块裂结构为主;93上05工作面及93上03工作面回采后,3下煤顶板以碎裂结构为主,沿空巷道附近其他位置仍以块裂结构为主。
Aiming at the complicated geological conditions of successive mining of multiple face under overburden and lateral goaf in complex of 93rd and 05th working face in Nantun Coal Mine, The dynamic evolution of surrounding rock structure is studied. The dynamic evolution law of surrounding rock structure along the air side after the mining of multi-face coal seam in the near coal seam of Nantun Coal Mine is obtained: 93 batches of 07 face after mining, 93 07 In the area of 6 m away from the goaf, the surrounding rock is dominated by fragmentation structure, and other structures near the gob lane are dominated by block-cracking structure. After the 93-05 working face and 93- 03 working face are recovered, In order to crack the main structure, other places along the gob lane is still dominated by block-cracking structure.