高压水射流钻割一体化防冲机理分析及其数值模拟研究  

Analysis and numerical simulation of high pressure water jet drilling-cutting integration for rock burst prevention mechanism

作　　者：杨增强 王琛艳[1] 朱栋[1] 任长乐[1] 李常浩 YANG Zengqiang;WANG Chenyan;ZHU Dong;REN Changle;LI Changhao(School of Transportation Engineering,Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China;Key Laboratory of Deep Coal Resource Mining,Ministry of Education of China,China University of Mining and Technology,Xuzhou 221116,China;Yuwu Mining Co.,Ltd.,Lu’an Group,Changzhi 046103,China)

机构地区：[1]江苏建筑职业技术学院交通工程学院,江苏徐州221116 [2]中国矿业大学深部煤炭资源开采教育部重点实验室,江苏徐州221116 [3]潞安集团余吾煤业有限公司,山西长治046103

出　　处：《矿业安全与环保》2021年第1期17-22,共6页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51874292,51574243);山东省深部冲击地压灾害评估工程实验室开放项目(鲁煤研开(2020)005号)。

摘　　要：为了研究高压水射流钻割一体化技术对煤层巷道的卸压防冲效果,以甘肃华亭砚北煤矿2502采区工程地质条件为背景,采用理论分析、数值模拟和现场工业性试验相结合的研究方法,对250203运输巷道受邻近250204工作面回采扰动影响进行了研究。结果表明:对巷帮煤体采取高压水射流冲孔措施后,煤体内的高集中静载将会转移和释放,并形成一定范围的“弱结构”区;巷帮“弱结构”区的存在能够有效降低动静载叠加作用下巷道帮部和底板煤体瞬间失稳冲击破坏。SOS微震系统监测结果表明,对250203运输巷道煤帮实施高压水射流冲孔措施后,其受邻近250204工作面回采扰动影响下冲孔段巷道两帮及底板内均没有大能量微震事件(E≥10^3 J)发生。研究成果为动静载叠加作用下巷道冲击地压防治提供了理论基础。In order to study the effect of high pressure water jet drilling-cutting integration technology on the pressure relief and erosion prevention of coal seam roadway,based on the engineering geological conditions of 2502 mining area of Yanbei Coal Mine in Huating,Gansu,the influence of mining disturbance on 250203 transportation roadway adjacent to 250204 working face was studied by theoretical analysis,numerical simulation and field industrial test.The results show that the high concentration of static load in the coal will be transferred and released after the high pressure water jet drilling of the roadway side coal,and a certain range of“weak structure”area will be formed;the existence of“weak structure”zone in roadway side can effectively reduce the instantaneous instability and impact damage of coal in the side and floor of the roadway under the action of dynamic and static load superposition.The monitoring results of SOS microseismic system show that no high-energy microseismic events(E≥10^3 J)occur in the two sides and floor of the 250203 transportation roadway under the influence of the mining disturbance near the 250204 working face after the implementation of high pressure water jet drilling measures.The research results provide theoretical basis and guiding significance for the prevention and control of rock burst in roadway under the action of dynamic and static load superposition.

关 键 词：高压水射流 巷道煤帮 底板 冲击地压 动静载叠加 数值模拟 

分 类 号：TD324[矿业工程—矿井建设]