邻近工作面开采影响下巷道稳定性及支护研究

Study on Roadway Stability and Support under the Influence of Mining in Adjacent Working Face

为解决团柏煤矿11-1502巷道受邻近工作面开采影响造成支护困难的技术难题,确保巷道的使用安全,分析了巷道围岩因邻近工作面开采所呈现的应力应变特征,采用短锚固高强度顶锚杆、大锚固密度和垂直顶板角锚的方式可充分发挥锚杆预应力作用,提升锚固强度。通过矿压观测和经济比较,支护方案可满足巷道使用要求并节约支护成本。

The roadway 11-1502 in Tuanbai Coal Mine is affected by the mining of adjacent working face,which results in support difficulties and affects roadway safety.In order to solve the problem,the paper analyzes the stress and strain characteristics of roadway surrounding rock due to mining in adjacent working face.The pre-stress of the bolt can be given full play and the strength of the bolt can be improved by means of short anchorage high strength roof bolt,large anchor density and vertical roof angle anchor.Through rock pressure observation and economic comparison,the support scheme can meet the requirements of roadway use and save support cost.