近距离煤层房柱式采空区下巷道支护技术研究

Study on Roadway Supporting Technology under Room-and-pillar Mined-out Area of Close-seams

针对近距离煤层房柱式采空区下巷道维护困难的问题,采用围岩结构窥视、数值模拟方式研究了下部煤层围岩特性和应力分布状态。针对上部为房柱式采空区、煤柱以及上下夹层厚度变化提出了采用高预应力树脂加长锚固锚杆差异化支护及架棚支护体系,有效地控制了巷道围岩变形,取得了良好的效果。

In order to solve the difficult problem of roadway supporting technology under the room-andpillar mined-out area of close-seams, the characteristics of surrounding rock and the stress distribution are studied by means of surrounding rock structure peeking and numerical simulation. Aiming at the change of thickness of pillars,pillars and upper and lower mezzanine,puts forward the high prestressed resin lengthened anchoring bolts different support and shelter support system,which can effectively control the deformation of roadway surrounding rock, and achieve good results.