地应力对瓦斯压力及突出灾害的控制作用研究  

Controlling effect of ground stress on gas pressure and outburst disaster

作　　者：程远平[1] 张晓磊[1] 王亮[1,2] 

机构地区：[1]中国矿业大学煤矿瓦斯治理国家工程研究中心,安全工程学院,江苏徐州221116 [2]淮北矿业股份有限公司博士后科研工作站,安徽淮北235000

出　　处：《采矿与安全工程学报》2013年第3期408-414,共7页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2011CB201204);国家自然科学基金青年基金项目(51004106);中国博士后科学基金面上项目(2012M510145)

摘　　要：为考察地应力对瓦斯压力与突出灾害的控制作用,通过理论分析和现场实例验证相结合的方法,分析了地应力的演化特征及构造应力对煤体结构、瓦斯压力和突出灾害的控制作用规律。研究结果表明:构造应力的演化对煤层瓦斯赋存及运移起主导控制作用,含煤地层在高构造应力作用下其煤层瓦斯压力梯度可能远超过静水压力梯度,形成高的瓦斯压力;在强烈构造运动作用下形成的构造煤具有煤体强度低、瓦斯吸附和放散能力强等特点。由于地应力对煤体结构和瓦斯压力均起到控制作用,可以认为地应力在突出灾害中起主导控制作用,是煤体破坏的主要动力,也是高压瓦斯存在的前提。最后文中以祁南煤矿72煤层的瓦斯突出灾害特征验证了构造应力对突出灾害的主导控制作用。To investigate the controlling effect of ground stress on gas pressure and outburst disaster, based on theoretical analysis and field verification, the evolution law of ground stress and its controlling effect on the coal structure, gas pressure and outburst disasters was analyzed in this paper. The results show that the evolution of tectonic stress plays a dominant role in the gas occurrence and migration. The coal seam gas pressure gradient under the higher tectonic stress may be greater than that under the hydrostatic pressure, which will lead to high gas pressure. In addition, the tectonic coal formed under the strong tectonic activity is charactered mainly by low strength, strong adsorption and diffusion. Moreover, due to the controlling effect on the coal structure and gas pressure, it is considered that the ground stress plays a leading controlling role in the outburst accident, which is the main driving force on coal mass destroy, and the premise condition for the existing of high-pressure gas. Finally, the leading controlling role of tectonic stress on outburst disaster have been verified by the characteristics of coal and gas outburst disasters in No.72 Coal Seam of Qinan Coal Mine.

关 键 词：地应力 构造应力 煤体结构 瓦斯压力 煤与瓦斯突出 

分 类 号：TD712[矿业工程—矿井通风与安全]