Numerical Simulation on the Influence of Mining-Induced Fractures Field on Gas Drainage and its Application
In order to study the influence of mining-induced fractures field on gas drainage,the paper adopts software of numerical simulation COMSOL Multiphysics to simulate gas drainage of coal seam under the condition of high-strength underground mining. The main aspects can be seen as the following: (1) In the case without considering the fractures, gas drainage in single hole, the gas pressure distribution showed a funnel-type distribution in space along the drainage holes around. (2) The orientation and direction of fractures play a major role on the flow field of gas. In the region that exits fractures, the distribution of gas pressure has a clear fluctuation and adjustment.(3) The numerical simulation of coal seam gas drainage that considered the fracture of coal mining, was closer to the true gas flow.
S. J. Zhang et al., "Numerical Simulation on the Influence of Mining-Induced Fractures Field on Gas Drainage and its Application", Applied Mechanics and Materials, Vols. 90-93, pp. 477-484, 2011