坚硬砂岩失稳摩擦速度引燃瓦斯试验研究  

Experimental Study on Igniting Gas byHard Sandstone with Unstable Friction Velocity

作　　者：张中腾 秦广鹏 王超[1,2] 刘炜震 孟德建[1,2] 张沛 ZHANG Zhongteng;QIN Guangfieng;WANG chao;LIU Weizhen;MENG Dejian;ZHANG Pei(College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;National Engineering Lab of Backfilling Mining in Coal Mine,Shandong University of Science and Technology,Tai'an,Shandong 271000,China;Sitai Coal Mine,Datong Coal Mine Group,Datong,Shanxi 037007,China)

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛市266590 [2]山东科技大学资源与土木工程系,山东泰安市271000 [3]大同煤矿集团有限公司,山西大同市037007

出　　处：《矿业研究与开发》2019年第8期92-95,共4页Mining Research and Development

基　　金：国家自然科学基金青年科学基金资助项目(51504145);山东省重点研发计划(公益类专项)资助项目(2017GGX20125);山东省高等学校科技计划资助项目(J17KB041)

摘　　要：为研究坚硬石英砂岩顶板冒落过程中摩擦引燃采空区瓦斯的作用机理,利用自主设计的岩石摩擦试验设备进行了不同速度下岩石摩擦试验,使用高清摄影机观察岩石摩擦所引起的火花现象,并对红外热成像仪实时收集的岩石摩擦所产生的红外辐射温度进行监测。根据试验结果可以得出:坚硬砂岩之间摩擦速度越快,坚硬砂岩摩擦做功越多,摩擦面所积聚能量越多,机械能转化为热能越来越快,可加快瓦斯与空气之间链式反应。当坚硬砂岩间摩擦速度V<6.24m/s,不会引起箱体内瓦斯爆炸;反之,则会引起箱体内瓦斯爆炸。In order to study the mechanism of friction and ignition of gas in the goaf during roof caving of hard quartz sandstone,the rock friction testsat different velocities were carried out by using self-designed rock friction testing equipment.The spark phenomenon caused by rock friction was observed by high-definition camera,the infrared radiation temperature generated by the rock friction was collected by the infrared thermal imager in real time for monitoring.According to the test results,it was concluded that the faster the friction velocity between hard sandstones,the more the work of friction between hard sandstones,the more energy accumulated on the friction surface,the faster the conversion of mechanical energy into thermal energy,and the faster the chain reaction between gas and air.When the friction velocity between hard sandstones was less than 6.24 m/s,the gas explosion in the box would not occur,on the contrary,the gas in the tank would explode.

关 键 词：坚硬砂岩 岩石摩擦试验 摩擦速度 瓦斯爆炸 

分 类 号：TD712[矿业工程—矿井通风与安全]