Research On Analysis And Control Of Roadway Stability Of Yide Coal 150103 Working Face Dynamic Pressure

Mine pressure rule and surrounding rock control technology has been the main project of the mine construction. At present, the coal industry is in the winter stage, how to improve the economic efficiency of the mine production has become an important problem in the competition. This paper a part of the national natural science fund "deep roadway double hull grouting reinforcement mechanism(51174070)", in hebei province natural science foundation of "JiNa area of deep roadway double hull grouting reinforcement mechanism(E2011402046), hebei engineering of deep soft rock roadways continuous’ double hull ’governance mechanism of floor heave of buried(E2015402038)".Yide coal for the new integrated mine, this paper to the 150103 by mining working face back airway tunneling as the research background, through theoretical analysis, numerical simulation and other research means, on tunnel adjacent to the mining working face when, roadway surrounding rock stress distribution, displacement changing law and the roadway branch support, coal pillars left width were studied.First of all, 150103 working face return air roadway excavation during the three stages(solid coal heading stage, along goaf digging Lane phase, mining stage effects of the surrounding rock stress, rock mass structure characteristics analysis, and to 150101 working face advance abutment pressure distribution were studied, analysis it is considered that the roadway under dynamic pressure effect of rock mass structure damage was first discovered in the weak structural plane and along the weak structure for deep coal development;Secondly, the failure mechanism of surrounding rock deformation in the 150103 dynamic pressure roadway is analyzed, including the analysis of the characteristics of surrounding rock failure, the mechanism of the instability of the surrounding rock structure, and the research of dynamic pressure roadway supporting technology, and the analysis of the three parts.Finally, by FLAC3 D numerical simulation during the 150103 working face return air roadway drivage technology in three stages of surrounding rock stress and displacement law of evolution, and the original roadway layout plan, optimizing coal pillar and roadway support supporting scheme for simulation and analysis of the simulation results show that the optimized after supporting scheme to which makes the roadway in dynamic pressure under the influence of continue to use, and from the model of plastic zone cloud found, coal pillars left position located just stress decreasing zone.