山东煤炭科技2025，Vol.43Issue(4)：116-121,6.DOI:10.3969/j.issn.1005-2801.2025.04.024
采动覆岩预裂弱化前后裂隙带发育规律模拟研究
Simulation Study on Development Law of Fissure Zone Before and After Pre-fracturing and Weakening of Mining Overburden
摘要
Abstract
In order to further understand the development and evolution distribution law of the mining overburden fissure zone in the 9#coal seam of Luotuoshan Coal Mine in Inner Mongolia,based on the engineering geological information of this coal mine,a three-dimensional numerical model is established using 3DEC discrete element software to analyze the evolution law of the spatial morphology of the mining overburden fissure zone along the working face inclination and direction before and after the weakening of the overlying rock strata by prefabricated cracks with the advancing distance of the working face.The results show that the scope form of the fissure zone in the overlying rock strata of the coal seam is similar to a"ladder like platform"shape,and the height of the fissure zone increases continuously with the advancement of the working face.The final development height of the fissure zone is about 80 m.The existence of prefabricated cracks(i.e.considering the use of horizontal hole segmented fracturing technology to longitudinally cut through the rock strata)weakens the integrity of the rock strata,causing the overlying rock strata to collapse in a timely manner after the working face advances,the development height of the fissure zone is about 85 m.The research results provide a theoretical basis for safe production and efficient drainage of pressure relief gas of this coal mine.关键词
上覆岩层/裂隙带发育/预制裂缝/3DEC离散元/数值模拟Key words
overlying rock strata/fissure zone development/prefabricated cracks/3DEC discrete element/numerical simulation分类
矿山工程引用本文复制引用
张军刚,白星宇,吴晓眩..采动覆岩预裂弱化前后裂隙带发育规律模拟研究[J].山东煤炭科技,2025,43(4):116-121,6.基金项目
中煤科工西安研究院(集团)有限公司横向项目(G001824003) （集团）
