煤体受拉破坏能量演化规律与失稳灾变特征  

Energy Evolution Law and Destabilization Damage Characteristics of Coal Mass under Tension Loading Process

作　　者：徐世龙 孙文洋 刘君奇 龙昭熹 汪官腾 薛兴卓 刘扬 尚少康 钮月 XU Shi-long;SUN Wen-yang;LIU Jun-qi;LONG Zhao-xi;WANG Guan-teng;XUE Xing-zhuo;LIU Yang;SHANG Shao-kang;NIU Yue(School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;Yunlong Lake Laboratory of Deep Earth Science and Engineering,Xuzhou 221006,China;Wanhua Chemical(Yantai)Battery Industry Co.,Ltd.,Yantai 264000,China;Dongxia Coal Mine,Huating Coal Industry Group Co.,Ltd.,Pingliang 744100,China;Peigou Coal Mine,Yanghe Coal Industry Co.,Ltd.,Zhengzhou Coal Industry(Group),Zhengzhou 452382,China)

机构地区：[1]中国矿业大学安全工程学院,徐州221116 [2]深地科学与工程云龙湖实验室,徐州221006 [3]万华化学(烟台)电池产业有限公司,烟台264000 [4]华亭煤业集团有限责任公司东峡煤矿,平凉744100 [5]郑州煤炭工业(集团)杨河煤业有限公司裴沟煤矿,郑州452382

出　　处：《科学技术与工程》2025年第1期112-118,共7页Science Technology and Engineering

基　　金：江苏省高等学校大学生创新创业训练计划(202210290133Y);徐州市基础研究计划(KC23017);国家自然科学基金(52104234);江苏省自然科学基金(BK20210504)。

摘　　要：为研究煤炭开采过程诱发的煤岩动力灾害防控问题,开展了原煤试样巴西劈裂试验,研究了受拉破坏过程中煤体的能量演化规律,对煤体失稳破坏的前兆信息进行了判识。结果表明:煤体受拉破坏过程具有显著的非线性演化特征,能够判识煤体破坏的临界点、失稳点、破坏点;受拉损伤破坏各阶段,煤体的能量演化特征差异显著,在弹性变形阶段,输入能主要转化为弹性能,耗散能保持稳定,而在失稳破坏阶段,耗弹比呈跳跃式增长;能量释放速率与能量耗散速率在煤体受拉过程的临界点、失稳点、破坏点处均具有异常响应特征,且特征点的出现均有显著的前兆信息。煤岩失稳破坏的本质是能量积聚与耗散的结果,煤体能量指标能够揭示试样损伤破坏过程中能量演化的异常特征,进而判识煤体发生灾变的前兆信息,有利于超前预警,保障煤炭资源安全高效开采。In order to study the prevention and control of power disaster induced by coal mining process,Brazilian splitting test of raw coal specimen was carried out to study the energy evolution law in the process of coal body tensile damage destruction,and the precursor information of coal body destabilization and destruction was identified.The results show that the coal body tensile damage process has significant nonlinear evolution characteristics,and it is possible to identify the critical point,destabilization point,and damage point of coal body damage.The energy evolution characteristics of coal body tensile damage in each stage are significantly different.In the elastic deformation stage,the input energy is mainly converted into elastic energy,and the dissipation energy remains stable,while in the destabilization stage,the dissipation-elasticity ratio shows a jumping growth.By calculating the energy release rate and energy dissipation rate,it is found that the index has abnormal response characteristics at the critical point,destabilization point and damage point of the coal body tensile process,and the appearance of the characteristic points all have significant precursor information.The nature of coal destabilization is the result of energy accumulation and dissipation,and the energy index of coal body can reveal the abnormal characteristics of energy evolution in the process of damage and destruction of the specimen,and identify the precursor information of coal body catastrophe,which is conducive to the over-warning,and escort for the safe mining of coal.

关 键 词：受载煤体 拉伸破坏 能量演化 灾变特征 前兆信息 

分 类 号：TD315[矿业工程—矿井建设]