【摘要】 为解析深部地下开采动力灾害诱发机制与范围,截取抚顺老虎台矿具有代表性的E5200剖面,按照实际开挖步骤进行了数值计算。以3g加速度为判据,对动力灾害危险区进行研究,阐释动力冲击3g包络域的概念,并依此判定可能发生冲击地压的岩体范围。研究结果表明,3g包络域半径与开采动力影响深度成正比关系,并且采深越大,3g半径也越大。基于上述发现,通过逐次优化监测点网的方法,确定出3g影响半径。更多还原

【Abstract】 In order to study the mechanism and predict the occurrence range of dynamic risk caused by underground mining,the dynamic events in a practical exploitation approaching to faults are investigated by using numerical method following the actual mining sequence on a typical cross-section E5200 in Laohutai colliery,Fushun.The dynamic risk area regionalization is specifically investigated,in which the criterion in terms of 3 g occurrence is proposed to diagnose the rockburst in responding positions.Based on the concept of 3 g envelope,the potential domain with dynamic risk is primarily identified.The effect of the faults is clarified when dynamic regionalization is carried out.The mining depth and the existence of faults are the main controlling factors of dynamic tremors under the complicated field situations.The presented work shows that there are directly proportional relationship between the radii of 3 g envelope and the mining induced tremor depth,and the deeper the mining is,the larger the radii of 3 g envelope will be.With regard to this discovery,the radii of the 3 g envelope are determined when sequential convergence methodology is employed.更多还原