Analysis on mechanism of coal and gas outburst with principles of soil mechanics
Abstract：In order to study the mechanism on coal and gas outburst, based on the standards for classification of rock mass structure, damage degree Ⅲ-V coal seam was regarded as loose structure rock mass. Refer to the theory of soil mechanics on soil flowing, it was supposed that coal and gas outburst may be induced by gas seepage. The critical gas pressure gradient was thought as a strength index preventing outburst. Through the a- nalysis of the gas pressure gradient, a conclusion was drawn that low permeability coal could occur easily high outburst intensity because of its high expansion energy after losing stability. Two new approaches of controlling outburst were suggested, which included setting seepage proof curtain and setting anti-filter layers.
Keywords：controlling coal and gas outburstgas pressure gradientseepage proof curtainanti-filter layer
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( 125-129 )