预应力顶板结构理论在极近距离煤层支护中的应用

Application of Prestressed Roof Structure Theory in Ultra-close Contiguous Seams Support

分析了大同矿区侏罗纪极近距离煤层开采下的支护现状,通过应用极近距离煤层支护理念及预应力顶板结构理论分析,确定了采用钢岩组合结构对巷道的支护形式及支护参数。实践证明,支护效果良好,能够有效地控制近距离煤层多层采空区巷道的围岩变形,便于掘进机机械的施工,降低了支护成本,减少巷道挖掘量,得到广泛应用。

Analysis of support current situation under ultra - close contiguous seams mining in Jurassic Datong mining area, makes an a- nalysis of ultra - close contiguous seams support application and prestressed roof structure theory, analysis to determine the use of com- bination of steel rock structure for the form and support care parameters of roadway. Practice has proved that the supporting effect, it can effectively control ultra - close contiguous seam multiplayer roadway surrounding rock deformation, it facilitate the construction of mechanical boring machine and reduce support cost, reducing the amount of roadway excavation, it has been widely used.