Study Of Instability Mechanism And Control Technology Of Coal Bump Under Conditions Of Thick Conglomerate Synergiesing With Thrusts

According to the fusion of research methods such as field survey, geologicalmodeling, theoretical analysis, field monitoring, similar simulation and numericalsimulation experiment, etc., mechanism of coal bumps occurred under the combinedaction of huge thick conglomerate and thrust fault of Yima mine is analysed and thecorresponding preventing and governing technology are put forward.Firstly, bycombining geological analysis and case studies, the two affect form of coal bumpsinduced by huge thick conglomerate and thrust fault of Yima mine are obtained. Byusing the three dimensional similarity simulation experiment and numericalsimulation. the failure mechanism of huge thick conglomerate influnced by miningand regularity of overlying conglomerate with different thickness influencing themining pressure of working face respectively are analyzed and through building atheoretical model the failure criterion of huge thick conglomerate is established.Secondly, through the actual analysis of measured data of ground stress of Yima minelot and the neural network method, the ground stress inversion in Qianqiu mine ofYima is carried out, and the law of the workface of stress under the action of faults isfound through numerical simulation to reveal the influence that the fault for the stressof primary rock and mining stress.Thirdly, the slip condition of huge thickconglomerate located in the thrust fault had been analyzed in the procedure of slip testand the establishment of the slide rule, and the criterion of fracture of huge thickconglomerate induced by the slip of thrust fault is established.Finally, the coal bumpsprevention and treatment system in Yima mine is established and the evaluation ofanti-bump support optimizing of working face25110of Yuejin mine is evaluated.