Based on geological and mining conditions of -530 rail roadways in the E Zhuang coal mine of the Xin Wen mine group, zonal disintegration phenomenon of deep cross-roadway surrounding rock mass with high-stress is inspected through employment of the strata exploring instrument. According to failure information inside roof rock strata recorded by the strata exploring instrument, rock failures in each drill are respectively drawn in one graph, and failure regions with the distance less than 0.2m are regarded as one partition. The study shows that because of stress field superposition and road excavated section increment of cross roadway under deep and high-stress conditions, large subsidence of the rock mass is caused, the fissure and slice come into being in cross roadway rock strata interface, subsequently zonal disintegration named complete failure zone and loose strip zone forms under the rock strata, and the higher the stress is, the higher the amount of zonal disintegration and radius.
展开▼
