The controlling role of gravitational slide structure to coal and gas outburst
Abstract：Based on lots of gas measuring parameters and gas-geological analyzing data,gravitational gliding structure formation mechanism was analyzed from the basic character,and the influence of gliding structure on coal thickness,coal body structure,stress state,coal metamorphism degree,and gas occurrence were studied,and the controlling role of gravitational gliding structure to coal and gas outburst was clarified.The results show that due to the control function of gravitational gliding structure,the original structure of coal is damaged,coal thickness has large variation,coal metamorphism degree is relatively taller,adsorption ability is relatively strong,and the gas volumn is relatively high.The trailing edge is mainly affected by tensile stress with more fissures in coal seam roof,and form a series of high angle normal faults,which makes for the absence of gas and restrains outburst happening.The leading edge which is mainly affected by compressive stress forms thrust fault combination and a dense water-barrier protection strata in coal seam roof,which hinders gas emission and makes gas content increased dramatically,and which is prone to coal and gas outburst accidents.
Keywords：gravitational gliding structurecoal and gas outburstgas occurrencestress statetectonic coal
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( 825-829 )