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空场采矿法滞留的采空区已成为河北某铁矿山的严重安全隐患之一。针对该矿采空区数量多、体积大的特点,在现场调查和室内力学实验研究的基础上,利用计算机数值模拟技术,采用RFPA2D软件对采空区围岩的破坏过程进行模拟计算,并结合现场的声发射地压监测数据对采空区的稳定性进行评价,确定目前该矿采空区稳定性良好。
Gob, which has been stranded by the open field mining method, has become one of the serious security risks of an iron mine in Hebei. Aiming at the characteristics of large number of mined-out areas and large volume of the mined-out area, on the basis of field investigations and laboratory mechanics experiments, the damage process of surrounding rock in the mined-out area was simulated and calculated by computer numerical simulation and RFPA2D software. The site of acoustic emission pressure monitoring data to evaluate the stability of the goaf, to determine the current stability of the mine goaf good.