Numerical Simulation on the Influence of Mining-Induced Fractures Field on Gas Drainage and its Application

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 477-484
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.477
• Online since: September 2011
• Authors: Shu Jing Zhang, Yong Wei Peng, Yong Jiang Yu
• Keywords: Coupling, Gas Drainage, Mining-Induced Fractures Field, Numerical Simulation

References

[1] Comsol AB. Comsol Multiphysics Quick Start and Reference [M]. 2007,203-250.

[2] Comsol AB. Comsol Multiphysics Earth science module[M]. 2007,59-78.

[3] Comsol AB. Comsol Multiphysics Structural mechanics module[M]. 2007,65-81.

[4] Tianji Fan. Technical Manual about Gas Comprehensive of Coal Mining(Book I)[M]. Jilin Audio-video Publishing, 2003:264-268(in Chinese).