大倾角综放采场遗留顶煤运移规律及防灭火技术  

Migration law of remaining top coal and fire control technology in fully mechanized caving face with steeply dipping coal seam

作　　者：卢树德 解盘石[2,3] 孙明福 邓军[2,4] 胡博胜 张波 LU Shude;XIE Panshi;SUN Mingfu;DENG Jun;HU Bosheng;ZHANG Bo(Gansu Jingyuan Coal Industry Group Co.,Ltd.,Baiyin 730900,China;Key Laboratory of Western Mine Mining and Disaster Prevention,Xi’an University of Science and Technology,Xi’an 710054,China;College of Energy Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]甘肃靖远煤业集团有限责任公司,甘肃白银730900 [2]西安科技大学西部矿井开采及灾害防治教育部重点实验室,陕西西安710054 [3]西安科技大学能源学院,陕西西安710054 [4]西安科技大学安全科学与工程学院,陕西西安710054

出　　处：《陕西煤炭》2024年第1期11-18,共8页Shaanxi Coal

基　　金：国家自然科学基金面上项目(52174126);陕西高校青年创新团队项目。

摘　　要：为研究大倾角综放采场遗留顶煤运移规律及裂隙扩展情况,以王家山煤矿中二401工作面为研究对象,采用物理相似模拟实验与数值模拟实验相结合的方法,深入分析大倾角综放采场遗留顶煤运移及裂隙发育规律。结果表明,大倾角综放采场遗留顶煤破碎和运移具有非对称性,工作面倾斜中下部应力与位移量均大于倾斜上部。遗留顶煤在采空区内沿倾斜方向呈现“顶煤—直接顶—顶煤”交替堆积形态,倾斜下部堆积量大于倾斜中上部。围岩裂隙发育范围广,随工作面推进最终可扩展至3号煤层。针对遗煤特征综合提出此类采场的“两阶段”防灭火技术措施,达到良好的防灭火效果,确保工作面安全高效生产。In order to study the migration law and crack propagation of the remaining top coal in the fully-mechanized caving face with steeply dipping coal seam,the Zhonger 401 working face of Wangjiashan Coal Mine of Jingyuan Coal Industry Group was taken as the research object,and the physical similarity simulation experiment and numerical simulation experiment were combined to analyze the migration and crack development law of the remaining top coal in the fully-mechanized caving face with steeply dipping coal seam.The results show that the crushing and migration of the remaining top coal in the fully mechanized caving face with large dip angle are asymmetric,and the stress and displacement in the middle and lower part of the inclined working face are greater than those in the upper part.The remaining top coal in the goaf presents an alternating accumulation form of’top coal-direct top-top coal’along the inclined direction,and the accumulation amount in the inclined lower part is greater than that in the inclined upper part.The fracture development range of overlying rock is wide,which can be extended to No.3 coal seam with the advance of working face.The“two-stage”fire prevention and extinguishing technical measures are put forward based on the characteristics of residual coal,which achieves good fire prevention and extinguishing effect and ensures the safe and efficient production of working face.

关 键 词：大倾角煤层 综放采场 遗留顶煤 防灭火技术 

分 类 号：TD325[矿业工程—矿井建设] TD753