Crossing roadway construction in deep soft strata is one of the technical problems in mine engineering construction. It’s difficult to form a bearing arch structure with reasonable force at the intersection of roadways. As the working face pushes forward the lateral constraint of the intermediate rock pillar is gradually missing, conventional supporting measures cannot achieve the purpose of controlling roadway deformation. Based on the deep analysis of the instability mechanism of the small Angle inclined roadway, a high strength strengthening technique is put forward, which uses steel truss to transfer the surrounding rock pressure and rock column to provide horizontal binding force to the anchor cable. Relying on the inclined project of 1203 connecting roadway of the lower gateway and main transport roadway in pansidong mine, two kinds of targeted strengthening support measures are proposed based on the principle of coordination between main and passive support. Through the establishment of numerical simulation model, the deformation characteristics and reinforcement effect of surrounding rock under different supporting measures were analyzed, and finally the comprehensive treatment scheme of "anchor mesh spraying + u-shaped roof + anchor rope piercing" was selected. The measured data show that the rock pillar reinforcement with anchor cable technology can effectively improve the stress state of surrounding rock, control the arch roof settlement and side wall displacement of the roadway, and verify the feasibility of the inclined roadway treatment scheme. The conclusion provides some theoretical guidance for solving the support problem of deep soft strata inclined roadway.
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陈刚. 深部软岩小角度斜交巷道综合控制技术及其应用[J]. 科学技术与工程, 2020, 20(32): 13143-13147. Chen Gang. Comprehensive Control and Analysis of Connection and TransportRoadway Crossing in Deep Soft Strata[J]. Science Technology and Engineering,2020,20(32):13143-13147.