浅埋厚煤层开采地表采动裂缝发育演化规律研究  

Development and Evolution Law of Surface Mining Fractures in Shallow Thick Coal Seam Mining

作　　者：李春永 LI Chunyong(Chuancao Gedan Coal Mine,Jungar Banner Yunfei Mining Co.,Ltd.,Ordos 010308,China)

机构地区：[1]准格尔旗云飞矿业有限责任公司串草圪旦煤矿,内蒙古鄂尔多斯010308

出　　处：《煤炭技术》2025年第1期99-102,共4页Coal Technology

摘　　要：基于串草圪旦煤矿典型生产工作面覆岩赋存情况及地表采动裂缝发育特征,采用现场实测、理论分析和数值计算相结合,研究了覆岩关键层失稳运动形式及其对地表采动裂缝发育形态的影响,以及基采比对地表采动裂缝演化规律的影响。结果表明:浅埋厚煤层开采过程中,关键层失稳运动对地表采动裂缝发育类型具有控制作用,关键层滑落失稳引起地表产生台阶型裂缝,关键层回转失稳引起地表产生张开型裂缝;覆岩关键层失稳运动过程导致地表采动裂缝尺度参数发生动态变化,随着基采比的增大,地表采动裂缝的垂直错动量呈减小趋势,水平张开量呈增大趋势,裂缝水平张开量与关键层回转角线性相关。Based on the occurrence of overlying rock and the development characteristics of surface mining-induced fractures in typical working face of Chuancao Gedan coal mine,the instability movement of key strata of overlying rock and its influence on the development of surface mininginduced fractures,as well as the influence of base-mining ratio on the evolution law of surface mininginduced fractures are studied by field measurement,theoretical analysis and numerical calculation.The results show that the development type of surface mining fractures is controlled by the instability movement of key layer in the mining process of shallow and thick coal seam.The slide and instability of key layer cause the surface to produce step type fractures,and the key layer turn and instability cause the surface to produce open type fractures.With the increase of the basic-mining ratio,the vertical dislocation momentum of surface mining fractures decreases,while the horizontal opening quantity increases.The horizontal crack opening is linearly related to the key layer rotation angle.

关 键 词：浅埋厚煤层 关键层 地表采动裂缝 发育演化规律 

分 类 号：TD823.253[矿业工程—煤矿开采] TD325[矿业工程—矿山开采]