基于力能角度的鹤壁矿区煤与瓦斯突出主控因素分析  

Analysis of the dominant controlling factor of the coal and gas outburst in Hebi Mining area based on the theory of stress and energy

作　　者：张明杰[1,2] 田加加 李凯 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南省瓦斯地质与瓦斯治理重点实验室--省部共建国家重点实验室培育基地,河南焦作454003

出　　处：《安全与环境学报》2015年第1期11-14,共4页Journal of Safety and Environment

基　　金：国家"十二五"科技重大专项课题(2011ZX-005)

摘　　要：根据鹤壁矿区实测煤层瓦斯含量和瓦斯压力结果,从力能角度分析了地应力、瓦斯、煤体结构对煤与瓦斯突出的影响,确定了地应力为鹤壁矿区煤与瓦斯突出的主控因素。受区域地质构造的控制,南部矿井构造应力大,瓦斯含量高,煤岩体弹性潜能、瓦斯膨胀能大;且构造煤普遍发育,煤体破碎功小。基于力能角度分析,南部矿井在埋藏较浅处,突出动力能量即大于突出阻力能量,是其始突深度较浅的主要原因,鹤壁矿区始突深度呈现南浅北深的特点。在地应力控制作用的基础上,结合三矿实测瓦斯压力、瓦斯突出能量分析,确定三矿在煤层底板标高-510 m以深为突出危险区。The paper aims to search for the dominant controlling factors of the coal and gas outburst in Hebi Mining Area based on the theory of the stress and energy,analyzing the reason for distribution of the outburst depth,and predicting the outburst danger zone of mine 3#. In order to achieve the mentioned purpose,we think it necessary to study the effects of the geostatic stress,the gas and coal structure on the coal and gas outburst. Accordingly,we have collected and measured the data of the gas content,gas pressure and the geostatic stress,so as to work out the elastic potential stress and the gas expansion energy at different depths in the mine. The results of our analysis show that the elastic potential energy tends to be greater than the gas expansion energy,and the geostatic stress is the dominant controlling factor of the coal and gas outburst. What is more,the elastic potential stress of the southern mines is higher than that of the northern ones,which implies that the southern mines is affected more significantly by the controlling function of the geostatic stress. Therefore,it is necessary to focus on reducing the geostatic stress when measures are taken to prevent the coal and gas outburst. Under the control of the regional geological structure,the actual tectonic stress and gas content is high in the southern mines,which can produce a high elastic potential stress and greater gas expansion energy. In addition,the tectonic coal is commonly developed in the area,which makes the coal more easier to be crushed. Therefore,the power energy of coal and gas outburst is higher than the resistance at a relatively shallow buried depth,which may account for why the southern mines have a shallower depth of coal and gas outburst.Besides,we have also found that the residual gas content of mine3#ranges from 3. 24 m3/ t to 3. 53 m3/ t,which is greater than that of general outburst coal. Thus,it is not available to take the critical value of 8 m3/ t to predict the outburst danger zone. According to the regression analysis o

关 键 词：安全工程 煤与瓦斯突出主控因素 始突深度 瓦斯膨胀能 弹性潜能 

分 类 号：X43[环境科学与工程—灾害防治] TD713[矿业工程—矿井通风与安全]