| The mine disaster of water is a seriously problem which has affected miningsafety in production, and a great majority disaster of water-inrush from the floor hasthe direct relation with fault. It’s more cause water-inrush when little fault and littlestructure exist. This article focuses on the complete floor and fault presence floor withthe process of coal mining, studied on the mining stress and confined aquifer stressfracture evolution law and fluid water inrush pathway law of the floor.This article summarized the main theoretical results on water inrush at home andabroad, analyzed the mechanical mechanism of the water-inrush from the floor, usethe theory of“Three-strips”combined Mohr-Coulomb criterion and relatedformula.Using RFPA-Flow software simulated the rock deformation and failure,fracture evolution law in the process of caving the floor, and water head Seepagemigration process. Gained mine rock floor deformation and failure process, damagezone and the formation and evolution of head pressure changes and seepage migrationin the process of mining. In the mining process, the deformation of rock floor showedcompression-expand-expand reduced to the stable law, the edge of the rock coalpillars the regions easiest to produce pressure-shear fracture channel and occurdamage. Divide the floor for fracture development zone: original seepagezone-seepage slow reduction zone-seepage sharp growth increment-seepage steadyslow reduction zone. The research will supply a theoretical and practical basis foreliminate or reduce the risk of water inrush.There are two phases of hidden fault activate water inrush under the geologicalfeatures of this place, hidden fault in different locations through the fault fissures lawsare different, from the mined-out area closer, the more prone to sudden water bottomburied fault activation; with the relief effect goaf increases the possibility of buriedfault and gradually increase the water inrush. |
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