倾斜厚煤层开采卸压瓦斯运储区能量耗散结构时变机理研究  

Study on time-varying mechanism of energy dissipation structure in depressed-pressure gas transport and storage area of inclined thick coal seam mining

作　　者：赵鹏翔 常泽晨 李树刚 卓日升 贾永勇 雷雯[4] 邵秋冬 裴文博 ZHAO Pengxiang;CHANG Zechen;LI Shugang;ZHUO Risheng;JIA Yongyong;LEI Wen;SHAO Qiudong;PEI Wenbo(College of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an,Shaanxi 710054,China;Xinjiang Key Laboratory of Green Coal Resources,Ministry of Education,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830023,China;Western Mining Gas Intelligent Extraction Engineering Research Centre,Xi'an,Shaanxi 71o054,China;Xinjiang Key Laboratory of Coal Mine Disaster Intelligent Prevention and Emergency Response,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830023,China;Xinjiang Uygur Autonomous Region Coal Science Research Institute,Urumqi,Xinjiang 830091,China;Xinjiang Changji Heze Tengda Mining Co.Ltd.,Changji,Xinjiang 831100,China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]新疆工程学院新疆煤炭资源绿色开采教育部重点实验室,新疆乌鲁木齐830023 [3]西部矿井瓦斯智能抽采工程研究中心,陕西西安710054 [4]新疆工程学院新疆煤矿灾害智能防控与应急重点实验室,新疆乌鲁木齐830023 [5]新疆维吾尔自治区煤炭科学研究所,新疆乌鲁木齐830091 [6]新疆昌吉市菏泽腾达矿业有限责任公司,新疆昌吉831100

出　　处：《中国矿业大学学报》2025年第1期202-214,共13页Journal of China University of Mining & Technology

基　　金：国家重点研发计划专项项目(2023YFC3009004);国家自然科学基金面上项目(52174205);新疆煤炭资源绿色开采教育部重点实验室开放课题项目(KLXGY-KA2404)。

摘　　要：为了确定倾斜厚煤层开采过程中覆岩能量耗散结构影响下的卸压瓦斯运储区产生和演化规律,针对新疆昌吉市菏泽腾达矿业B5#煤层主采工作面,采用理论研究和物理相似模拟试验探究覆岩裂隙时变规律,明确卸压瓦斯运储区区域范围,定义卸压瓦斯运储区覆岩中的能量耗散结构,确定能量耗散结构种类、形成判据及演化规律,揭示倾斜厚煤层开采卸压瓦斯运储区能量耗散结构时变机理.结果表明:采动过程中上覆岩层破断裂隙密度突变点5.5条/m和贯通度突变点0.57可将裂隙场划分为瓦斯储集区、瓦斯运移区和压实区;依据能量积聚形式将覆岩能量耗散结构分为点能量耗散结构和线能量耗散结构,能量耗散结构形态呈现出“半月”状,能量耗散结构失稳破坏能量判据计算值和现场微震监测测量值误差小于9.58%;现场将钻孔终孔布置在瓦斯运储区中,平均单孔瓦斯抽采纯量和瓦斯抽采体积分数相较于调控前提升1.56倍和1.96倍,上隅角、工作面和回风巷的平均瓦斯体积分数降低至0.31%,0.12%和0.22%,瓦斯抽采效果良好.研究结果进一步为倾斜厚煤层卸压瓦斯高效抽采提供一定的理论指导.In order to determine the generation and evolution law of depressurized the gas transport and storage areas under the influence of energy dissipation structure of overlying rock during mining of inclined thick coal seam.Based on the main mining face of B5#coal seam in Tengda Mining,Heze,Changji,Xinjiang,the time-varying law of overlying rock fissure was investigated by theoretical research and physical similarity simulation experiment.The regional scope of the pressure relief gas transport and storage areas was defined.The energy dissipation structure in overlying rock in the depressurized gas transport and storage areas was defined.The types,formation criteria and evolution rules of energy dissipation structures were determined.And the time-varying mechanism of energy dissipation structures in the depressurized gas transport and storage areas of inclined thick coal seam mining was revealed.The results shown that the abrupt change point of fracture density 5.5/m and the abrupt change point of penetration degree 0.57 were important parameters in the mining process.These two parameters could be used to divide the fracture field into gas reservoir area,gas migration area and compaction area.According to the energy accumulation form,the energy dissipation structure of overlying rock could be divided into point energy dissipation structure and line energy dissipation structure.The energy dissipation structure had a"half moon"shape.The error between the calculated value of energy dissipation structure instability failure criterion and the measured value of field microseismic monitoring was less than 9.58%.The final drilling hole was arranged in the gas transport and storage areas.The average single-hole gas extraction purity and gas extraction volume fraction increased by 156%and 196%compared with that before regulation.The average gas volume fraction in the upper corner,working face and return air roadway was reduced to 0.31%,0.12%and 0.22%.The gas extraction effect was good.The research results further provided some

关 键 词：倾斜厚煤层 能量耗散结构 卸压瓦斯运储区 “半月”状 时变机理 

分 类 号：TD712[矿业工程—矿井通风与安全]