短壁块段式充填采煤覆岩导水裂隙发育机理及控制研究  

Study on the development mechanism and control of water-conducting fractures in short-wall block backfill mining

作　　者：张云 曹胜根[2] 来兴平[1] 赵长政 都书禹 ZHANG Yun;CAO Shenggen;LAI Xingping;ZHAO Changzheng;DU Shuyu(School of Energy Science and Engineering,Key Laboratory of Western Mines and Hazard Prevention of Ministry of Education,XiJan University of Science&Technology,Xi'an,Shaanxi 710054,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining&Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]西安科技大学能源学院,西部矿井开采及灾害防治教育部重点实验室,陕西西安710054 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2019年第6期1086-1092,共7页Journal of Mining & Safety Engineering

基　　金：国家科学自然基金项目(51874284);国家重点基础研究发展计划(973)项目(2015CB251600);中央高校基本科研业务费专项资金项目(2018ZDPY04)

摘　　要：针对矿区开采遗留的"三下"压煤、边角煤柱、工广煤柱以及不规则块段等煤炭资源的回收问题,同时为解决矸石堆积危害和煤炭开采造成的水资源流失,提出采用短壁块段式充填采煤技术回收该资源。为了准确地计算短壁块段式充填开采造成的导水裂隙带发育高度,在分析块段式充填开采工艺特点和上覆岩层移动特征的基础上,采用弹性地基梁理论,建立了一种计算块段式充填采场覆岩导水裂隙带高度的力学分析模型。以现场实验区域为例,研究得到实验工作面导水裂隙带高度不发育至含水层的最小煤宽度柱和采空区充实率分别为5 m和65%;鉴于此,现场设计保护煤柱宽度为5 m,充实率为80%。A short-wall block backfill mining(SBBM) technique is proposed for the recovery of the coal resources buried under buildings, railways, and water-bodies, residual corner coal pillars, industrial square coal pillars and irregular blocks left behind during the exploitation of coal mines and for the risks associated with gangue piling and the loss of water resources owing to coal mining. Based on the theory of beams on elastic foundations, a mechanical analysis model has been established for calculating the height of a water-conducting fracture zone(WCFZ) in the overlying strata of coal mines exploited using the SBBM technique. In the field experiment site, it is discovered that the minimum coal pillar width and goaf backfill percentage which prevent the development of water-conducting fractures down to an aquifer are 5 m and 65%, respectively. Based on this result, the protective pillars of the site were designed to be 5 m wide, while the goaf backfill percentage was set as 80%.

关 键 词：水资源保护 短壁块段式充填采煤 导水裂隙带高度 弹性地基梁 

分 类 号：TD325[矿业工程—矿井建设]