11_(上)401工作面巷道支护方案设计与应用

Design and Application of Roadway Support Scheme for No.11_(upper) 401 Working Face

为控制巷道围岩变形,结合11_(上)401工作面进风顺槽井下巷道围岩性质等实际条件,提出采用锚杆+锚索+钢筋焊结网的支护方案。实践表明:采用该支护方式在掘进施工完成后20 d内巷道两帮移近量在40 mm左右、顶底板移近量在80 mm左右,20 d以后巷道围岩基本处于稳定状态。

In order to control the deformation of roadway surrounding rock,combined with the actual conditions such as the nature of roadway surrounding rock of the No.11_(upper) 401 working face,the supporting scheme of bolt+anchor cable+steel welded mesh is proposed.The practice shows that with this support method,within 20 days after the completion of the excavation construction,the two sides of the roadway approach is about 40 mm,the roof and floor approach is about 80 mm,and the surrounding rock of the roadway is basically in a stable state after 20 days.