大采高回采巷道超前支护技术实践

Practices on advanced support in gateway of large mining height coalface

针对大采高回采巷道超前影响区变形严重现象,采用数值模拟的方法研究工作面回采时回采巷道应力及变形情况,结果表明:大采高回采巷道受工作面回采影响严重,尤其在底板中。并根据回采原有支护设计确定的大采高回采巷道超前支护参数。最终确定在工作面前方采用单体液压支柱进行超前支护60 m。

Advance-affected zone of gateway has a severe deformation. Aiming at this problem, numerical simulation has been used to research the stress and deformation of gateway when mining workface. The result shows that mining workface has a serious influence on gateway, especially in floor. The parameters of advanced support is designed according to the original support. At last, this paper confirms advanced support should be extended 60 meters with single hydraulic support.