Xinji Coal Mine Goaf "Three Zones" In Height And210108High Alley Pumping Horizon Determined Reasonably

This paper first introduces the coal mine gas disaster and the extent of damage, the management situation of domestic and foreign gas, necessity and urgency of the study on the gas drainage. By consulting and arranging the related research governance of domestic coal gas, simulation210108goaf overburden height of "three zones" by using the FLAC3D software, analyzed the height of "three zones" and gas management relations, thus better drainage of goaf gas, the specific contents include the following:1, FLAC3D software is used to establish the numerical model, the calculation model of size, meshes and boundary conditions of model.2, simulation in the principal stress and displacement isoline map of different position of the mined rock, plastic ring distribution, observation210108goaf overburden thick sandstone roof deformation and failure by multi-point displacement, determine the height of "three zones".3, at the height of "three zones" basis, through the FLUENT software simulation to determine the high pumping Lane reasonable horizon, specifically:(1) prediction of gas emission in210108working face;(2) high pumping lane and high drilling for gas drainage of advantages and disadvantages, to determine the high level suction roadway gas drainage basis;(3) FLUENT software to establish the numerical model, the relevant calculation parameters, roof high pumping Lane horizontal and vertical position determined;(4) analysis of return air roadway different horizontal distance and different vertical positions of gas concentration and gas flow distance, the high level suction roadway drainage reasonable position of gas.Through the analysis and the summary, the result of the experiment and numerical simulation results are in good agreement, and puts forward related gas drainage considerations, provides some reference to related research fields in the future.