黑龙江科技大学学报2026，Vol.36Issue(5)：718-723,6.DOI:10.3969/j.issn.2095-7262.2026.05.003
近距离煤层上保护层开采煤岩体的动力学演化数值模拟
Dynamic evolution numerical simulation of coal rock mass on mining of upper protective layer in close range coal seam
摘要
Abstract
This paper intends to explore the mining of upper protective layers in close range coal seams and the evolution of coal rock stress.Taking the 3203 protective layer working face and the protec-ted layer working face of Zhongxing Coal Industry in Fenxi,Shanxi as the engineering background,the study involves using the methods of theoretical analysis,computer simulation,on-site sampling analysis to analyze the mining feasibility of upper protective layer,establishing a numerical simulation model of me-chanical evolution of coal rock mass in protective layer mining,and studying the stress distribution of the protected layer at different periods of mining in the 3203 protective layer working face.The results show that the mining of protective layer leads to the emergence of more free gas in the coal seam of the 3203 working face,while having a relatively small impact on the drilling of adjacent layers below,which can relieve pressure and release gas in the 3203 working face and underlying coal seam.After the mining,of the protective layer,the gas extraction concentration of the 3203 coal seam along the seam drilling increa-ses to 17%-22%,with an average extraction purity of 0.484 m3/min.The residual gas content of the coal seam of 2#is 5.07 m3/t,which is less than the requirement of 8 m3/t.关键词
保护层开采/岩体应力应变/瓦斯卸压抽采/近距离煤层Key words
protective layer mining/stress and strain of rock mass/gas depressurization and extrac-tion/close range coal seam分类
矿业与冶金引用本文复制引用
刘子文..近距离煤层上保护层开采煤岩体的动力学演化数值模拟[J].黑龙江科技大学学报,2026,36(5):718-723,6.基金项目
国家自然科学基金资助项目(52174229) （52174229）
