煤岩双剪摩擦滑动声电响应实验研究  

Experimental study on acoustic and electrical response of double shear friction sliding of coal and rock

作　　者：李红平 李鹏鹏 张强 赵志鹏 贾兵兵 胡旭聪 LI Hongping;LI Pengpeng;ZHANG Qiang;ZHAO Zhipeng;JIA Bingbing;HU Xucong(Kuangou Coal Mine,CHN Energy Xinjiang Energy Co.,Ltd.,Changji 831200,China;School of Civil and Resource Engineering,University of Science and Technology Bejing,Beijing 100083,China;Administrators Training Center,Xinjiang Uygur A utonomous Region Development and Reform Commission,Urumqi 830000,China)

机构地区：[1]国家能源集团新疆能源公司宽沟煤矿,新疆昌吉831200 [2]北京科技大学土木与资源工程学院,北京100083 [3]新疆维吾尔自治区发展和改革委员会干部培训中心,新疆乌鲁木齐830000

出　　处：《煤矿安全》2023年第3期169-176,共8页Safety in Coal Mines

摘　　要：井下开采过程中常伴有煤体摩擦现象。大尺度煤岩体摩擦滑动引发的煤岩动力灾害会带来巨大的经济损失和人员伤亡。以宽沟煤样为实验对象,利用摩擦装置进行了不同加载速率(0.1、0.2、0.3、0.4 mm/s)条件下的煤样摩擦实验,得出了试样在不同加载速率下声发射和电磁辐射的信号特征。研究表明:试样受载滑动过程中伴随有明显的声发射电磁辐射信号产生,且声电信号随加载呈周期变化,声电信号强度随载荷降出现而出现,随载荷降的幅值的增加而增大,两者之间在时序上具有一定的协同性;累计声电能量计数变化与试样摩擦破坏程度正相关,基于累计声电能量计数指标可实现试样摩擦启动和结束的判断预警。In the process of underground mining,coal body friction is often accompanied.The coal-rock dynamic disaster caused by the friction and sliding of large-scale coal-rock mass will bring huge economic losses and casualties.Based on this,this paper takes Kuangou coal samples as the experimental object,and uses the friction device to carry out the coal sample friction experiments under the conditions of different loading rates(0.1,0.2,0.3,0.4 mm/s),and obtain signal characteristics of acoustic emission and electromagnetic radiation at loading rates.The research shows that the sample is accompanied by obvious acoustic emission electromagnetic radiation signal in the process of sliding under loading,and the acoustoelectric signal changes periodically with the loading.The intensity of acoustic signal appears with the occurrence of load drop,and increases with the increase of load drop amplitude.There is a certain synergy between the two in time sequence;the change of the cumulative acoustic energy count is positively correlated with the degree of friction damage of the sample.Based on the cumulative acoustic energy count index,the judgment and early warning of the start and end of the friction of the sample can be realized.

关 键 词：煤岩 双剪实验 摩擦滑动 声发射 电磁辐射 监测预警 

分 类 号：TD324.1[矿业工程—矿井建设]