祁南煤矿火成岩侵蚀对煤层瓦斯赋存及突出灾害的影响  

Influence of Igneous Rock Erosion on Coal Seam Gas Occurrence and Outburst Disaster in Qinan Coal Mine

作　　者：沈先华 李贺 鲁义 路洁心 施式亮 SHEN Xianhua;LI He;LU Yi;LU Jiexin;SHI Shiliang(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《矿业工程研究》2023年第1期29-35,共7页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51904103);中国博士后科学基金资助项目(2019M652765)。

摘　　要：通过在祁南煤矿火成岩侵蚀区域附近的巷道布置采样或测压钻孔,对火成岩侵蚀区的煤层进行现场取样和实验室参数测定分析,结果表明:火成岩侵蚀后煤层灰分显著降低,胶质层平均厚度与黏结指数增加,煤的变质程度升高,发热量增大,煤层变为易选煤层.研究火成岩侵蚀对煤质、煤层厚度及瓦斯赋存规律等方面的影响,发现火成岩侵蚀不仅破坏了煤层的原生状态,使煤层焦化,采区储量降低,火成岩侵蚀产生的强大推挤力还使煤层层位发生相对位移,煤层变薄或完全被吞蚀,继而导致煤层的厚度变异程度和突出危险性增大,煤层结构趋于复杂,稳定性降低,不可采区增大.最后根据火成岩侵蚀区的煤岩瓦斯动力灾变机制,提出针对性的瓦斯防治技术措施.By arranging sampling or pressure borehole in the roadway near the igneous erosion area in Qinan Coal Mine,the field sampling and laboratory parameter measurement and analysis of the coal seam in the igneous erosion area are carried out.The results show that the coal ash content decreases significantly after the igneous rock erosion,glial layer thickness and caking index increase on average,coal metamorphism degree rises,calorific value rises,and coal seam becomes easy to choose.The effects of igneous erosion on coal quality,coal seam thickness and gas storage patterns are studied.It is found that igneous erosion not only destroys the primary state of the coal seam,causing coal seam coking and reducing the storage capacity of the mining area,but the strong pushing force generated by igneous erosion also causes the relative displacement of the coal seam level,the coal seam becomes thinner or is completely swallowed,which then leads to an increase in the thickness variability and protrusion risk of the coal seam.The coal seam structure tends to be more complex and less stable,and the unmineable area increases.Finally,according to the kinetic disaster mechanism of coal and rock gas in the igneous erosion zone,targeted technical measures for gas prevention and control are proposed.

关 键 词：火成岩侵蚀区 瓦斯赋存 煤质 瓦斯防治技术 

分 类 号：TD712[矿业工程—矿井通风与安全]