浅埋煤层采场覆岩运动及来压规律研究  

Study on Overlying Strata Movement and Weighting Law in Shallow Coal Seam Stope

作　　者：段志军 郑文翔 DUAN Zhijun;ZHENG Wenxiang(College of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou O14010,China)

机构地区：[1]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010

出　　处：《煤炭技术》2022年第11期1-4,共4页Coal Technology

基　　金：内蒙古自治区自然科学基金项目资助(2019MS05053,2019MS05055)。

摘　　要：针对浅埋煤层采场覆岩运动特征及来压规律问题的研究,以万利一矿42303工作面的浅埋煤层为工程背景,通过物理模拟和数值模拟开展分析和研究。研究表明:42303工作面初次来压垮落步距为60 m,其压力峰值为14.7 MPa,覆岩初次周期来压步距为90 m,其压力峰值为15.97 MPa。此后周期垮落步距平均为12 m,最终呈现出垮落带高度为22 m,裂隙带高度为169 m的梯形结构。采空区上覆岩层呈现为梯形垮落结构,随工作面向前推进,采空区上覆岩层的梯形垮落结构影响范围逐渐增大。In view of the research on the movement characteristics and weighting law of overlying strata in shallow coal seam stope,taking the shallow coal seam in 42303 working face of Wanli No.1coal mine as the engineering background,the analysis and research are carried out through physical simulation and numerical simulation.The research shows that the first weighting step of 42303 working face is 60 m,the peak pressure is 14.7 MPa,the first periodic weighting step of overlying strata is 90 m,and the peak pressure is 15.97 MPa.Since then,the average interval of periodic caving is 12 m,and finally it presents a trapezoidal structure with the height of caving zone of 22 m and the height of fracture zone of 169 m.The overlying strata of the mined-out area show a trapezoidal collapse structure,and the influence range of the trapezoidal collapse structure of the overlying strata of the mined-out area gradually increases with the advancing of the working face.

关 键 词：浅埋煤层 覆岩运动 来压规律 相似模拟 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]