破碎围岩环境下巷道应力与变形监测

Monitoring of the deformation and surrounding stress of a roadway under broken rock mass environment

开采过程中,破碎围岩环境下巷道煤岩结构及应力与变形随时间演化行为直接影响其稳定性。通过理论计算,结合现场应力监测、声发射(acoustic emission,AE)和钻孔窥视等手段,定量确定了工作面煤巷的松动范围和塑性区范围,综合分析了破碎围岩环境下煤岩非对称变形特征,为工作面安全开采提供了依据。

In the process of mining under broken rock mass environment, the stability of structure of surrounding rock-mass will be directly influenced due to stress and deformation evolution. Based on the monitoring instrument of surrounding stress, acoustic emission （AE） and borehole-peer, the deformation and stress characteristics are comprehensively analyzed under the fractured surrounding rock mass. Finally, using theoretical calculation and in-situ test, the loose scope and plastic zone were confirmed quantitatively. All these can provide basis for safe mining.