Surrounding Rock Instability of Mining Induced Roadway and Control Technology

As -720 track roadway of Renlou Coal Mine had serious deformation, which was influenced strongly by overlying coal seam working face mining. Therefore, by the means of the combining method of theoretical analysis and numerical simulation, the influence law of overlying coal seam working face mining on floor roadway surrounding rock stability had been analyzed, and the surrounding rock instability mechanism of mining induced roadway was studied. By using support structure compensation technology, high strength stable bolt-mesh-anchor support technology suitable for this kind of the mining induced roadway was put forward, and the industrial test was done. During the overlying working face mining, a long-time observation of test roadway surrounding rock deformation was done, which could master the deformation characteristics of roadway surrounding rock during working face mining, and correctly evaluate support technology and the rationality of the parameters.