Coupled model research of gas-solid based on gas seepage characteristics from borehole drainage
With the increase of mining depth of mine, ground stress, gas pressure, the change of factors such as coal properties on gas seepage influence is more and more obvious.According to drilling drainage of solid deformation and gas seepage characteristics of the basic theory, introduced the control equations of solid mechanics and the coupling of porous media flow, at the same time, considered the effect of molecular slippage effect of seepage.Is established considering the drainage borehole in different in-situ stress, the initial permeability and drainage negative pressure cohdition, the gas migration and the function of the deformation and phase coupling mathematical model.By studying borehole drainage of gas in the process, under the influence of different ground stress and gas pressure, the change rule of permeability of coal seam and gas migration.Simulation results for the gas drainage, understand the deep coal seams gas seepage properties and how to in the face of deep mining in complex geological conditions, to solve the problem of deep drainage gas gas disaster accidents involved technical problems to provide important theoretical guidance.
borehole drainage gas seepage gas solid coupling model numerical simulation
SHEN Hou-you
Dingji Coal Mine of Huainan Mining (Group) Co., Ltd., Huainan 232001, China
国际会议
International Mining Conference 2014(2014国际采矿论坛)
安徽淮南
英文
361-367
2014-09-19（万方平台首次上网日期，不代表论文的发表时间）