基于深井综采工作面开采的矿压显现规律研究  

Study on the Law of Strata Behavior Based on the Mining at Fully Mechanized Mining Face in Deep Well

作　　者：郜腾云 Gao Tengyun(Gucheng Colliery,Luan Chemical Industry Group,Changzhi,Shanxi 046100)

机构地区：[1]潞安化工集团古城煤矿,山西长治046100

出　　处：《江西煤炭科技》2024年第2期50-53,共4页Jiangxi Coal Science & Technology

摘　　要：以钱家营矿2021E工作面地质生产条件为工程背景,开展回采期间工作面的矿压显现规律研究。基于基本顶固支梁模型理论及煤矿三下开采规范,计算确定工作面初次来压步距和周期来压步距分别为37.69m和12.5618.84m,覆岩“三带”中垮落带、裂隙带和弯曲下沉带最大范围分别为11.26m,41.31m和581.39m;利用数值模拟方法对不同采高条件进行模拟分析,确认3m采高时在工作面超前支承应力作用范围、围岩稳定性和位移变形控制方面效果较好;进一步分析3m采高时工作面覆岩顶板运移规律,得到初次来压步距为39m,垮落带高度为11.14m,通过数值模拟分析,上述理论计算的数据得到进一步验证。Taking the geological production conditions of the 2021E working face in Qianjaying Mine as the engineering background,strata behavior regularity of the working face during the mining period is studied in the paper.Based on roof fixed beam theoretic model and the coal mine three underground mining specifications,the initial pressure step distance and periodic pressure step distance of the working face are calculated and determined to be 37.69 m and 12.56~18.84 m,respectively.The maximum ranges of the collapse zone,fracture zone,and bending subsidence zone in the"three zones"of the overlying rock are 11.26 m,41.31 m,and 581.39 m,respectively;Different mining height conditions are simulated and analyzed by numerical simulation methods,confirming that the effect of advanced support stress range,surrounding rock stability,and displacement deformation control in the working face is good when mining at a height of 3 m.Further analysis of the movement law of the overlying rock roof in the working face at a mining height of 3 m reveals that the initial pressure step distance is 39 m and the height of the collapse zone is 11.14 m.Through numerical simulation analysis,the above theoretical calculation data has been further verified.

关 键 词：初次来压步距 周期来压步距 理论计算 数值模拟 矿压显现 

分 类 号：TD323[矿业工程—矿井建设]