矿产保护与利用2025，Vol.45Issue(4)：71-79,9.DOI:10.13779/j.cnki.issn1001-0076.2025.04.006
浅埋煤层覆岩采动损伤时空演化及浆体邻位充填能力分析
Analysis on the Time-Space Evolution of Mining-Induced Damage in Overburden of Shallow Coal Seam and the Filling Capacity of Slurry Adjacent Position
摘要
Abstract
The spatial evolution of the caving zone in coal mining areas and the assessment of the filling capacity of gangue slurry are the key issues that must be urgently addressed in the gangue slurry filling technology for goaf areas.To accurately calculate the filling space volume of the gangue slurry in caving zones and the amount of gangue to be disposed,this study took the No.42208 working face of the Liangshuijing Coal Mine as the basic geological prototype,a numerical model of the mining-induced overburden damage was constructed by using the particle flow discrete element method.The development of fractures and the evolution law of void ratio in the mining-induced overburden were simulated and analyzed.The accuracy of the numerical simulation results was verified by comparing the measurement results.Based on the comprehensive theoretical analysis and numerical simulation results,the annual gangue disposal amount for adjacent filling of gangue slurry in goaf caving zones was determined.The results show that the average development height of the water-conducting fracture zone in the overburden of the No.42208 working face of Liangshuijing Coal Mine is 67.00 m,with an average fracture-mining ratio of 19.14,the average development height of the caving zone is 20 m,with an average caving-mining ratio of 5.71.The development morphology of the water-conducting fracture zone in the overburden exhibits a regular trapezoidal feature.From the evolution of void ratio in mining-induced overburden,it can be found that the targeted area for gangue slurry filling in the goaf is mainly within 50 m horizontally form the coal pillars on both sides.within the caving zone on both sides of the goaf.The annual gangue disposal amount for gangue slurry filling in the goaf caving zone of the No.42208 working face of Liangshuijing Coal Mine is approximately 330 000 tons.The research results can provide a theoretical basis for the efficient adjacent filling of gangue slurry in caving zones of coal mining areas,which promotes the green and low-carbon development of coal resources.关键词
浅埋煤层/采动损伤/空隙率/垮落带/邻位充填/颗粒流离散元法/数值模拟Key words
shallow coal seam/mining-induced damage/porosity/caving zone/adjacent filling/PFC/numerical simulation分类
矿业与冶金引用本文复制引用
田建设,苟科学,敬毅,种德雨,蔚保宁,杜江,刘智振,曹鑫..浅埋煤层覆岩采动损伤时空演化及浆体邻位充填能力分析[J].矿产保护与利用,2025,45(4):71-79,9.基金项目
中国博士后科学基金项目(2024MD753979) （2024MD753979）
陕西省博士后科研项目(2024BSHSDZZ210) （2024BSHSDZZ210）
