综放工作面矿压显现研究及切顶卸压技术应用

Study of Strata Behaviors on Fully Mechanized Caving Face and Application of Roof Cutting and Pressure Releasing Technology

为解决留设煤柱过大造成的煤炭资源浪费和巷道支护困难,基于斜沟煤矿综采放顶煤工作面顶板特殊控制结构,对顶板矿压显现进行研究。根据23107工作面两巷的地质条件,采用深孔爆破的方法对两巷顶板进行切顶卸压。现场压力监测结果表明,切顶卸压有效改善了工作面及两巷的应力环境,减少了对相邻工作面掘进和回采的影响,为综采放顶煤工作面开采少留煤柱开辟了新的途径。

In order to solve the problem of coal resource waste and roadway support caused by too large coal column,based on the special roof control structure of fully mechanized top coal caving face in Xiegou coal mine,the strata behavior of roof is studied. According to the geological conditions of the two roadways in the 23107 working face,the roof cutting and pressure releasing method of the deep hole blasting is adopted to relieve the roof pressure of the two roadways. The field pressure monitoring results show that the roof cutting and pressure releasing method effectively improves the stress environment of the working face and the two roadways,and opens up a new way for decrease the coal column mining in the fully mechanized top coal caving face,providing technical experience for the roof management of similar geological conditions.