蹬空开采顶底板破坏特征及控制技术  

Failure characteristic of roof and floor in ascending mining and its control technology

作　　者：刘明杰 李冬伟[2] 瞿群迪[2] 

机构地区：[1]中煤集团山西金海洋能源有限公司,山西朔州036900 [2]中国矿业大学矿业工程学院,江苏徐州221008

出　　处：《辽宁工程技术大学学报（自然科学版）》2014年第6期758-762,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：中国矿业大学煤炭资源与安全开采国家重点实验室自主研究课题资助项目(SKLCRSM12X01);国家自然科学基金项目资助(50974118)

摘　　要：针对山西中新甘庄煤业有限责任公司矿井整合后8#煤层蹬空开采会对顶底板围岩造成二次破坏的问题,采用理论分析及数值模拟研究的方法对蹬空开采顶底板破坏特征进行了研究。结果表明:8#煤层蹬空开采垮落带最大高度大于7#、8#煤层最小垂距,底板导水裂隙带深度小于8#、11#煤层垂距.当工作面推进至7#煤柱下方时,矿压显现更严重.并就可能出现的开采安全隐患提出了相应的应对措施.The ascending mining of the 8# coal seam will lead to the second breakage of the roof and floor in the integrated and restructured coal mine, affiliated to Zhong Xin Gan Zhuang limited liability company in Shanxi province. In view of the problem, the study on the failure of the roof and floor has been conducted by using the method of numerical simulation and theoretical analysis. The result indicates that after ascending mining, the maximum height of the caving zone in 8# coal seam is larger than the vertical distance between the 8# coal seam and the 7# coal seam, and the water-flowing fractured zone in the floor is smaller than the vertical distance between the 8# coal seam and the 11# coal seam. Ground pressures are more serious when the coalface is under the coal pillars left in the 7# coal seam. Countermeasures for potential safety hazards are put forward.

关 键 词：整合矿井 蹬空开采 导水裂隙带 竖向三带 FLAC 应力集中 顶底板二次破坏 安全开采措施 

分 类 号：TD35[矿业工程—矿井建设]