Study on Failure Characteristic Simulation of Seam Floor for Coal Mining above Confined Aquifer Based on Fluid-Solid Coupling Theory

Abstract:

Water inrush is one of the main types of coal mine water disaster. Based on fluid-solid coupling theory, the confined water inrush numerical model is performed using FLAC3D program and similar simulation experiment, and the floor damage field and confined water vector field are simulated. The results show that, in the coupling action of mining stress and pressure of confined water, the mining floor was divided into four zones, namely the mining damage zone, effective confining protection zone, confined water soil-fluid coupling lifting zone, original confined water lifting zone. Confined water-conductive zone with the periodic roof pressure fluctuate, at each pressure and flowing zone height reaches the maximum, rise with height remained unchanged, the distribution shape of a "wave", water inrush is the results of effective connectivity of mining damage zone and Confined water-conductive zone, plate thickness of water-resisting layer exists or not, waterproof performance and the pressure of confined water inrush size is the key

• Periodical: Applied Mechanics and Materials (Volumes 675-677)
• Pages: 1433-1439
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.675-677.1433
• Online since: October 2014
• Authors: Yu Jun Zhang
• Keywords: Above Confined Aquifer, Confined Water-Conductive Zone, Failure of Seam Floor, Fluid-Solid Coupling, Water Inrush from Seam Floor

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