俯伪斜开采采场顶板破断模型与工程实测研究  

Model of the roof fracture in pitching diagonal mining panel and its field measurement

作　　者：潘瑞凯[1] 曹树刚[1] 沈大富 梁俊林[1] 廖建国[3] PAN Ruikai CAO Shugang SHEN Dafu LIANG Junlin LIAO Jianguo(State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resource and Environmental Science, Chongqing University, Chongqing 400044, China Science and Technology Co Ltd, Chongqing Energy Investment Group, Chongqing 400044, China ChongqingSongzaoCoal-ElectricityCoLtd, Chongqing 40.1445, China)

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室资源及环境科学学院,重庆400044 [2]重庆能源投资集团科技有限责任公司,重庆400044 [3]重庆松藻煤电有限责任公司,重庆401445

出　　处：《采矿与安全工程学报》2017年第4期637-643,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51474039;U1361205);贵州省教育厅创新群体重大项目(黔教合KY字[2016]042)

摘　　要：根据俯伪斜开采采场布置呈平行四边形特点,基于弹性薄板小挠度理论,建立了俯伪斜开采基本顶力学模型;采用康托洛维奇法推导得到工作面初采和正常推进2个阶段基本顶弯曲变形近似表达式,揭示了俯伪斜采场基本顶2个阶段变形破断形状效应的力学机理。结合逢春煤矿S2611俯伪斜工作面的实际工程参数,计算得出工作面初次来压步距和周期来压步距分别为12 m和8 m,基本顶破断前最大挠度均为0.08 m,处于工作面中上部位置。对急倾斜薄煤层俯伪斜工作面来压强度低,采空区上、中、下部矸石充填率差异不大及分段来压等特殊矿压现象进行了讨论。According to the arrangement feature of parallelogram in the pitching diagonal mining panel,the mechanical model of the main roof in this panel was built based on the small deflection theory of the thin flexible plate;the approximate formulas of bending deformation of main roof during the initial stage and the normal stage of mining in pitching diagonal mining panel were derived based with Kantorovich method;the mechanical mechanism of the shape effect of the deformation and fracture in the main roof were revealed.Combining the actual engineering parameters in the pitching diagonal working face of S2611 in Fengchun Coal Mine,the distance of initial weighting and periodic weighting of the main roof were calculated to be 12 m and 8 m respectively,and the maximum deflection of main roof at the upper-middle working face was worked out to be about 0.08 m.Last,such special phenomena of strata behavior as low weighting intensity,similar rate of gangue filling along the entire gob and subsection weighting are discussed.

关 键 词：急倾斜 薄煤层 俯伪斜开采 平行四边形板 

分 类 号：TD323[矿业工程—矿井建设]