摘要
从祁东矿岩浆侵入的形成机制入手,分析了岩浆侵入分布特征,岩浆岩侵入对煤体结构、构造煤的成因及分布、瓦斯异常赋存的影响,阐明了岩浆侵入对煤与瓦斯突出的控制作用。研究结果表明:岩浆以顺煤层上部侵入为主,改变局部煤层的顶板岩性,形成致密的隔气层;导致煤层、煤质在垂向上煤级分带异常显著,二次生烃含气量增加显著,二者控制着瓦斯异常富集赋存;构造运动伴随岩浆活动,形成构造煤和局部应力集中区,应力分析得出,中央回风下山巷道走向为近SN向,与最大主应力方向夹角大,巷道在掘进过程中煤体承受应力较大,产生构造煤,同时,构造煤特性决定其抵抗外来破坏的能力小,造成了该区域频繁发生动力现象。
In this paper, learning from the formation mechanism of magmatic rock in Qidong Coal Mine, we analyzed the distribution characteristics of magmatic rock intrusion, and the influence of magmatic rock intrusion to coal structure, the cause and distribution of tectonic coal, and abnormal gas occurrence, and illustrated the control function of rock intrusion to coal and gas outburst.The results show that the magmatic rock mainly intruded along the upper coal seam, which can change the lithology of partial coal seam roof and form a dense gas barrier layer, leading to significantly abnormal vertical zonation in coal and coal property, and the increase of the secondary hydrocarbon gas content, both of which control the abnormal gas occurrence. Tectonic movements were accompanied by magmatic activ-ity, which has formed the concentration area of tectonic coal and local stress. The stress analysis shows the central air-return roadway is nearly SN direction.The angle between the maximum principal stress and roadway is large, and the coal stress of roadway in the drilling process is high, then the tectonic coal has formed. Meanwhile, the ability of tectonic coal to resist the external destruction is small, resulting in frequency occurrence of dynamic phenomena in the region.
出处
《采矿与安全工程学报》
EI
北大核心
2014年第4期650-656,共7页
Journal of Mining & Safety Engineering
基金
国家"十二五"科技重大专项课题项目(2011ZX05040-005)
河南理工大学博士基金项目(648089)
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外部开放基金项目(WS2013A11)
河南省教育厅科学技术重点研究项目(14A44008)
关键词
岩浆侵入
煤体结构
构造煤
瓦斯赋存
煤与瓦斯突出
magmatic rock intrusion
coal structure
tectonic coal
gas occurrence
coal and gas outburst
