浅埋煤层过沟开采地表裂缝动态发育规律研究  

Study on dynamic development of surface fractures in shallow coal seam mining through gully

作　　者：姜钰泉 孙学阳[2] 姚星 王志杰 贾少杰 安宁 JIANG Yuquan;SUN Xueyang;YAO Xing;WANG Zhijie;JIA Shaojie;AN Ning(Shaanxi Institute of Coal Geology Exploration Co.,Ltd.,Xi'an 710021,China;College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China;Shenzhen ETO Information Co.,Ltd.,Shenzhen 518000,China;Gansu Institute of Engineering Geology,Lanzhou 730000,China)

机构地区：[1]陕西煤田地质勘查研究院有限公司,陕西西安710021 [2]西安科技大学地质与环境学院,陕西西安710054 [3]深圳市易图资讯股份有限公司,广东深圳518000 [4]甘肃工程地质研究院,甘肃兰州730000

出　　处：《煤矿安全》2023年第8期136-142,共7页Safety in Coal Mines

摘　　要：为研究煤层在过沟开采时地表裂缝在不同位置的动态演化规律,以陕北某矿14210工作面为原型,运用相似材料模拟实验并结合VIC-3D系统研究了地表裂缝的发育特征。研究结果显示:沟谷处地表裂缝发育宽度先增大再急速减少最终闭合;左侧坡面与右侧坡面地表裂缝发育宽度先增大后小幅减少再趋于稳定;根据其发育位置与应变变化将地表裂缝分为左侧坡面张拉地表裂缝、沟谷挤压地表裂缝及右侧坡面张拉地表裂缝3类。通过对14210工作面过沟开采进行安全性预测可知:在过沟开采期间导致乌兰不拉沟泉水涌入工作面的因素大致分为裂缝宽度、裂缝分布密度、沟中水位、工作面推进速度4个因素。In order to study the dynamic evolution law of surface fractures in different positions when coal seam is mined through a gully,the development characteristics of surface fractures are studied by using similar material simulation experiment and VIC-3D system,taking 14210 working face of a mine in northern Shaanxi Province as the prototype.The results show that the width of surface cracks in the gully increases first,then decreases rapidly and finally closes.The width of surface cracks on the left slope and the right slope increased first,then decreased slightly,and then tended to be stable.According to their development location and strain changes,the surface fractures can be divided into three categories:left slope tension surface fracture,gully compression surface fracture and right slope tension surface fracture.Based on the safety prediction of 14210 working face mining through gully,it can be seen that the factors leading to Wulanbulagou spring water flooding into the working face during mining through the gully can be roughly divided into four factors:crack width,crack distribution density,water level in gully and advancing speed of workingface.

关 键 词：过沟开采 地表裂缝 VIC-3D系统 动态演化规律 覆岩应变 

分 类 号：TD325[矿业工程—矿井建设]