煤与瓦斯突出过程的能量分析  

An analysis on the energy of coal and gas outburst process

作　　者：姜永东[1] 郑权[1] 刘浩[1] 宋晓[1] 

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2013年第7期98-101,120,共5页Journal of Chongqing University

基　　金：国家自然科学基金青年基金(50904082;51204218);重庆市科委院士基金资助项目(CSTC2010BC6006);中央高校基本科研业务费(CDJZR12248801;CDJZR10248801);煤矿灾害动力学与控制国家重点实验室自主项目(2011DA105287-MS201203)

摘　　要：基于煤与瓦斯突出综合作用假说,通过理论分析与实验研究了煤与瓦斯突出过程中煤体弹性能和瓦斯膨胀能做功。利用MTS815岩石力学试验系统,实验研究了不同围压下煤样的三轴压缩试验,得出煤体的单位体积弹性能与体应力之间呈幂函数关系;用自制的瓦斯膨胀能装置,测试了不同含水量、气体压力、密实度条件下煤体中的气体膨胀能,得出气体膨胀能与气体压力呈线性关系,且气体在膨胀过程中对外做功时,系统温度变化在1℃左右,研究表明,煤与瓦斯突出过程可以近似看作等温过程。研究结果深化了对煤与瓦斯突出机理的认识,为能量判据奠定了基础。Based on the hypothesis of the synthetic coal and gas outburst operating,we study the work done by elastic energy of coal mass and methane expansion energy in the coal and gas outburst process through theory and experiment.By using MTS815 rock mechanics test system,the triaxial compression test of the coal sample is carried out under different confining pressures and the power function relation between coal body＇s elastic energy per unit volume and body stress is worked out.It shows there is a linear relation between methane expansion energy and methane pressure obtained by testing methane expansion energy under different moisture contents,different methane pressures and different compactness of coal mass,with the help of self-developed methane expansion energy testing device.The temperature change in the system is about 1 ℃ when methane does work in expansion.The result also shows that it could be regard as an isothermal process during coal and gas outburst.The results from experiment do great help in researching the mechanism of coal and gas outburst and establishing energy criterion.

关 键 词：煤与瓦斯突出 突出机理 煤体弹性能 瓦斯膨胀能 

分 类 号：X45[环境科学与工程—灾害防治]