作　　者： ;

机构地区： 中国矿业大学资源与地球科学学院

出　　处： 《煤炭技术》 2014年第8期21-23,共3页

摘　　要： 由于煤体的非均值性和开采卸压或古应力引起的应力集中,煤体中的软弱煤发生流变。软弱煤碎裂产生的碎裂面增加了煤的比表面积,造成了瓦斯大量吸附,降低了瓦斯压力。附近煤体纷纷解吸,不断向软弱破碎煤层渗流扩散。而软弱煤体由于吸附瓦斯,强度变弱而进一步破碎。伴随着软煤的破碎和瓦斯含量的增加,储存了大量膨胀能和瓦斯的煤粉池就形成了。煤粉池机理将煤与瓦斯突出视为是卸压开采过程中,地应力的集中引起的煤体流变和煤体池引起的瓦斯重新分配发展到一定阶段的产物。 Due to the heterogeneity of coal and the stress concentration caused by the mining pressure or ancient stress,rheology of soft coal may be easily generated.Cataclasm face produced by fragmentation of soft coal lead huge increasement in specific surface area of coal,adsorption of gas and reducement of gas pressure.Gas desorped from adjacent coal percolat and diffuse to the fractured coal.Accordingly,the week coal fragment further as weak coal adsorp gas and reduce intensity.Along with the fragmentation of coal and the increase of adsorped gas,coal powder pool stored a large amount of gas and expansion energy form.By coal powder pool mechanism,we consider coal and gas outburst as production of the development of rheology of coal caused by concentration of stress and gas redistribute caused by rheology of coal at certain stage.

关 键 词： 煤与瓦斯突出 煤粉池 比表面积

领　　域： [矿业工程]