Study On Deformation Mechanism And Control Strategy For Deep Rock Roadway In The Fifth Coal Mine Of HBCG

Based on the theoretic knowledge which consists of engineering rock mass mechanics, engineering geology, soft rock engineering mechanics, and numerical calculation and so on, through the methods such as engineering geological investigation, laboratory experiment, numerical simulation and theoretic analysis, the geological condition of deep rock roadway in the fifth coal mine of HBCG was analyzed in the dissertation. The different engineering rock groups was put forward and theirs critical depth and support difficulty were determined. Through the analysis of destruction characteristics and its instability mechanism of deep rock roadway in the Fifth Coal Mine of HBCG, the key factors affecting the stability of roadway were identified. A stability analysis model of deep rock roadway was established. A integrated multiple-step control measure, design method and construction process were raised, which mainly concludes bolt-mesh coupling support firstly to control walls, cable coupling support secondly to control roof, and base angel bolt at the same time to control plastic zones of the floor, and flexible layer truss coupling support finally to control whole deformation. In view of the deformation mechanical mechanisms of deep rock the new opening roadway in the Fifth Coal Mine of HBCG, the control measures and the design schemes were put forward. According to the engineering geological condition of intersecting roadways, a new technical measure of controlling intersecting roadways has been put forward. The research achievement was applied to the in situ engineering, the analysis method and control strategy was verified to be scientific, rational and effective through in situ monitoring results.