固体充填采煤充填体与围岩相互作用时空演化特征研究  

Study on Spatiotemporal Evolution Characteristics of Interaction between Backfilling Body and Surrounding Rock in Solid Backfill Coal Mining

作　　者：贾圣明 王仁燕 陈威 JIA Shengming;WANG Renyan;CHEN Wei(Chongqing Jiulongpo District Construction Affairs Center,Chongqing 400050,China;China CMCU Engineering Co.,Ltd.,Chongqing 400039,China)

机构地区：[1]重庆市九龙坡区建设事务中心,重庆400050 [2]中机中联工程有限公司,重庆400039

出　　处：《煤炭技术》2024年第10期18-23,共6页Coal Technology

摘　　要：基于某煤矿7203w回采工作面工程条件,结合有限差分软件,分析了不同空间位置、不同时间阶段覆岩运动变化特征及充填体应力变化规律,提出了基于充填体与围岩相互作用时空效应的控顶优化设计方法。研究表明:沿工作面走向和倾斜方向,越靠近中部位置,直接顶下沉量越大,充填体应力也越大;在沿工作面走向上,距始采线和停采线50 m范围内,直接顶下沉值及充填体应力变化幅度较大,在中部100 m范围内直接顶下沉值变化不大;沿工作面倾斜方向上,距工作面两端25 m范围内,直接顶下沉值变化幅度较大,在中部40 m范围内直接顶下沉值变化不大;“核心区”充实率88%、“次核心区”充实率83%、“边界区”充实率80%,控顶优化设计方案的最终实际控制充实率为90.4%,满足工程要求。研究成果可为固体充填采煤技术的控顶设计提供理论支撑。Based on the engineering context of the 7203w mining face in a certain coal mine,combines finite different method to analyze the characteristics of overlying strata movement and stress variation of the backflling body at different spatial positions and time stages.It proposes an optimized design method for controlling the roof based on the spatiotemporal effects of the interaction between the backilling body and surrounding rock in solid backfill coal mining.The research indicates that regardless of the direction along the mining face or the inclination direction,the closer to the central position,the greater the direct roof subsidence and the higher the stress of the backflling body.Along the direction of the mining face,within a range of 50 m from the start line and stop line,there are significant variations in direct roof subsidence,whereas within a range of 100 m from the central area,these variations are insignificant.Along the inclined direction of the mining face,within a range of 25 m from both ends of the mining face,there are significant variations in direct roof subsidence,whereas within a range of 40 m from the central area,these variations are insignificant.An optimized scheme of roof control is obtained with a final actual control filling rate of 90.4%,meeting the engineering design requirements with a core area filling rate of 88%,a sub-core area filling rate of 83%,and a boundary area filling rate of 80%.The research findings provide theoretical support for the control roof design in solid backfill coal mining technology.

关 键 词：固体充填采煤 充填体 围岩 时空效应 

分 类 号：TD823[矿业工程—煤矿开采]