Mechanism Analysis on Concentrated Stress in Front of Mining Face Moving Forward Occurred by Water Injection in Seam
Abstract：According to the concentrated stress moving forward problem occurred during the process of eliminating the mine pressure bumping and coal and gas outburst danger in the coal mining face with seam water injection in Xinxing Mine, the mechanism of water in- jection to wet coal body, reduced the seam support capacity, which would cause the stress moving forward was analyzed. In combination with the geological conditions of Xinxing Mine, a numerical simulation was conducted on the borehole water injection process. The concen- trated stress moving forward after the water injection, coal wall displacement increasing and the vadose field distribution condition around the water injection borehole were analyzed. The study results of the numerical simulation and the theoretical analysis results were same. A formula for the permeability radius of the water injection borehole and the stress moving forward distance was inferred when the water injec- tion time eonducted at the certain time.
Keywords：seam water injectionstress moving forwardmine pressure bumpingcoal and gas outburstdisplacement of coal wall
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 56-59,48 )