沿空留巷充填区域锚索锚固区内外顶板离层力学分析与工程应用  

Mechanical analysis of roof separation within and outside anchorage zone above backfill area of gob-side entry retaining and its engineering application

作　　者：张自政[1,2] 柏建彪 王卫军[1] 陈勇[3] 于宪阳[1] 吴海 ZHANG Zizheng;BAI Jianbiao;WANG Weijun;CHEN Yong;YU Xianyang;WU Hai(Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines,Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China;Research Center of Coal Resources Safe Mining and Clean Utilization,Liaoning Technical University,Fuxin,Liaoning 123000,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining＆Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]湖南科技大学南方煤矿瓦斯与顶板灾害防治国家安全生产重点实验室煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [2]辽宁工程技术大学煤炭资源安全开采与洁净利用工程研究中心,辽宁阜新123000 [3]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》2018年第5期893-901,共9页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金項目(51804111;51574227;51504246);煤炭资源安全开采与洁净利用工程研究中心开放基金项目(LNTU16KF04)

摘　　要：以兴无煤矿厚层直接顶中厚煤层沿空留巷和余吾煤业综放沿空留巷为工程背景,建立了沿空留巷充填区域锚索锚固区内外顶板离层力学模型,推导得到了沿空留巷充填区域锚索锚固区内外顶板离层量的计算式,确定了充填区域锚索锚固区内外顶板离层量的影响因素及影响规律。结果表明:各支护因素对顶板离层量的影响程度依次是巷内顶板支护强度>充填区域临时支护强度>充填区域外侧临时支护强度>充填区域锚索支护强度>实体煤帮支护强度;各几何因素对顶板离层量的影响程度是充填区域外侧宽度>充填区域宽度;沿空留巷宽度对充填区域顶板离层影响规律与基本顶在采空区侧侧向破断位置有关。基于此,提出了沿空留巷充填区域锚索锚固区内外顶板离层分区分阶段控制对策,并成功应用到兴无煤矿厚层直接顶中厚煤层沿空留巷和余吾煤业综放沿空留巷中。Taking gob-side entry retaining（GER） in medium-thickness coal seam with thick-layer immediate roof of Xingwu coal mine and GER in fully mechanized sublevel caving face of Yuwu coal mine as study cases, a mechanical model concerning roof separation within and outside the anchorage zone above backfill area of GER was established. A formula was derived to calculate the roof separation, whose influence factors and law were also obtained. According to the results, the following support factors are arranged in the descending order of their influencing degree, i.e., roof support strength, temporary support strength of backfill area, temporary support strength outside backfill area, cable support strength of backfill area and the support strength of integrated coal side. Moreover, the following geometrical factors are arranged in the descending order of their influencing degree, i.e., lateral width of backfill area and backfill width. The influence of the retained roadway width on the roof separation is associated with the lateral breaking position of the main roof in the goaf. Based on the above results, regional countermeasures are proposed in stages to control the roof separation within and outside the anchorage zone above the backfill area of GER, which are successfully applied in GER in mid-thickness coal seam with thick-layer immediate roof of Xingwu coal mine and GER in fully mechanized sublevel caving face of Yuwu coal mine.

关 键 词：沿空留巷 充填区域 离层变形 锚索锚固区 

分 类 号：TD353[矿业工程—矿井建设]