热力-动力复合变质煤的瓦斯放散特征及表征指标研究  

Study on gas dispersion characteristics and characterization indexes of thermodynamic composite metamorphic coal

作　　者：富向 沙慧慧 陈志平[2] 刘洪达 刘烜 范超军[1] FU Xiang;SHA Huihui;CHEN Zhiping;LIU Hongda;LIU Xuan;FAN Chaojun(College of Mining,Liaoning Technical University,Fuxin 123000,China;Daqiang Coal Mine,Tiefa Coal Industry(Group)Company Limited,Tieling 112700,China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]铁法煤业(集团)有限责任公司大强煤矿,辽宁铁岭112700

出　　处：《辽宁工程技术大学学报（自然科学版）》2023年第6期641-648,共8页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金项目(52174117,52004117);辽宁工程技术大学学科创新团队项目(LNTU20TD-30)。

摘　　要：为研究热力-动力复合变质煤的瓦斯放散规律,通过电镜扫描、比表面积测定、压汞和瓦斯放散初速度实验,分析变质煤的孔隙变化特征,揭示变质煤的孔隙发育规律和瓦斯放散特性,提出瓦斯放散特征新指标速坚比。研究结果表明:与正常煤相比,热力-动力复合变质煤大中孔发育,微孔孔容和比表面积下降,吸附瓦斯能力增强,瓦斯突出危险性大。速坚比能更好地表征复合变质煤的瓦斯放散特性。研究结论为预测受火成岩入侵以及断层作用下的煤体瓦斯突出危险性提供参考。In order to study the gas dispersion law of thermal-power composite metamorphic coal,the pore change characteristics of metamorphic coal were analyzed through electron microscope scanning,specific surface area measurement,mercury injection and initial velocity experiment of gas emission.The pore development law and gas emission characteristics of metamorphic coal were revealed,and a new index of gas emission characteristics,velocity-solid ratio,was proposed.The results show that compared with normal coal,the thermo-power composite metamorphic coal has large and medium porosity,the microporous pore volume and specific surface area decrease,the adsorption capacity of gas is enhanced,and the risk of gas outburst is greater.The velocity-solid ratio can better characterize the gas emission characteristics of composite metamorphic coal.The research conclusion provides a reference for predicting the risk of coal gas outburst due to igneous rock intrusion and faults.

关 键 词：孔隙系统 瓦斯放散初速度 突出指标 热力变质煤 动力变质煤 

分 类 号：TD712[矿业工程—矿井通风与安全]