充分采动阶段覆岩多层空间结构支承压力研究

The dynamic abutment pressure rule of overlying strata spatial structures at the phases sub-critical mining

将采场上方直至地表的岩层视为采场上方的覆岩空间结构,基于微地震定位监测,圈定采场覆岩多层空间结构的范围,研究覆岩空间结构岩层运动发展规律,建立覆岩空间结构走向支承压力模型;利用力学方法,得到走向支承压力计算公式;利用上述计算方法,研究了新汶矿业集团华丰煤矿1410工作面走向超前支承压力分布规律,并与现场微地震监测结果进行了对比分析.研究表明:上述方法适用于深部采场岩层运动范围扩展后的充分采动阶段采场走向支承压力的估算和预测.

The multilayer spatial structures of the overlying strata were regarded as from stope face to the surface and their areas were located by microseismic monitoring, their movement rules were studied and their calculation models of abutment pressure were set up, and proposed the calculation formulaes of dynamic abutment pressure based on the elasticity theory. By using this method, the abutment pressure of Huafeng Coal Mine was studied and the calculation results were compared to the results of field microseismic monitoring. Field experiments in Huafeng Coal Mine show clearly that this method is useful for the prediction of abutment pressure.