【摘要】 采用离散元数值模拟的方法研究煤层综放开采覆岩破坏规律,对数值模型的计算结果分析得出:通过提高综采支架支护阻力,可抑制工作面控顶区附近顶板采动裂隙发育高度,使其不波及松散含水层,从而实现高承压松散含水层下,提高上限安全开采目的,为高承压松散含水体下缩小安全煤岩柱开采,合理解放和回收防水煤柱内所呆滞的煤炭资源提供了理论基础。更多还原

【Abstract】 The discrete element numerical simulation method was applied to study the overburden strata failure law above the fully mechanized top coal caving mining face.The analysis on the calculation results of the numerical mode showed that with the support resistance improved of the powered supports in the fully mechanized top coal caving mining face,the mining cracking height in the roof near the main roof control area above the coal mining face could be controlled.Thus the cracking controlled would not be affected to the soft aquifer and the up limit of the safe mining could increased under the pressurized aquifer and could provide the theoretical base for the coal mining with smaller safety coal or rock pillars under the pressurized water aquifer and rational liberation and recovery the water prevention coal pillars and other coal resources.更多还原