裴沟煤矿综放开采地表动态移动规律研究  

Dynamic Surface Movement Characteristics of Fully-mechanized Top Coal Caving Mining in Peigou Coal Mine

作　　者：许国胜 许胜军[2] 李德海[2] 李回贵 XU Guo-sheng;XU Sheng-jun;LI De-hai;LI Hui-gui(School of Mining Engineering,Guizhou University of Engineering Science,Bijie 551700,China;Mining Research Institute,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]贵州工程应用技术学院矿业工程学院,贵州毕节551700 [2]河南理工大学矿业研究院,河南焦作454000

出　　处：《煤炭技术》2021年第12期23-26,共4页Coal Technology

基　　金：贵州省教育厅基金项目(黔教合KY字[2018]388号);贵州工程应用技术学院科学研究基金(院科合字G2018012号);毕节市科技局科技联合基金(毕科联合字G[2019]1号);贵州省区域内一流建设培育学科“生态学”。

摘　　要：为了掌握裴沟煤矿水库下开采地表动态移动规律,以地表移动观测站实测数据为基础,获得综放开采地表动态移动参数在开采过程中的变化规律,通过数据拟合得到最大下沉速度及其滞后距与工作面推进距离的Knothe时间函数关系式,推导得到走向主断面上下沉速度计算公式。通过对比开采距离360 m时地表走向主断面下沉速度的实测值与计算值,发现两者的平均误差为1.57 mm/d,计算公式能够满足工程需要。根据工作面开采过程中地表裂缝的发生及扩展状态统计数据,得到煤层走向方向上综合超前裂缝角为64.40°,倾向方向上上山侧和下山侧综合裂缝角分别为61.70°和29.64°,上山侧地表裂缝较发育,裂缝扩展长度大且相互沟通。In order to master the dynamic surface movement characteristics of mining under reservoir in Peigou coal mine,based on the measured data of surface movement observation station,the variation law of dynamic surface movement parameters in fully-mechanized top coal caving mining process is obtained,and the calculation formula of subsidence velocity on strike main section is derived by the Knothe time function,which is data fitting relation between the maximum subsidence speed and its lag distance in the advancing distance of the working face.Comparing the measured subsidence velocity and the calculation subsidence velocity on strike main section with the advancing distance 360 m,the average error between the calculation results and the measured values is 1.57 mm/d,which can meet the needs of the project.According to the statistical data of the occurrence and expansion of the surface cracks in the mining process of the working face,the comprehensive advanced fracture angle in the coal seam strike direction is 64.40° in the strike direction,and 61.70° and 29.64° in the upward and downhill sides respectively It is relatively developed,and the fracture propagation length is large and communicated with each other.

关 键 词：开采沉陷 综放开采 地表动态移动 地表裂缝 

分 类 号：TD325[矿业工程—矿井建设]