煤炭科技2025，Vol.46Issue(6)：213-217,5.DOI:10.19896/j.cnki.mtkj.2025.06.038
多煤层开采采空区遗留煤柱判识及防冲技术研究
Research on identification and anti scouring technology of remaining coal pillars in multi-seam mining goaf
摘要
Abstract
Addressing the issues of identifying remaining coal pillars and the stress transfer in mined-out areas of multiple coal seams,the coal pillars in the mined-out area of Lower1 coal seam in a mine in Xinjiang was taken as the engineering background.The FLAC3D numerical simulation method was utilized to analyze the plastic zone range and stress transfer of coal pillars with different widths in goaf of Lower1 coal seam,and identify the critical value of the width of remaining coal pillars.Based on the protective layer mining theory,the influence range of the remaining coal pillars was calculated,and a technical plan for monitoring and prevention of mining and excavation work faces under the influence area of the remaining coal pillars in goaf was formulated.The results indicate that the critical width of re-maining coal pillar in goaf of Lower1 coal seam is 22 m;the stress peak of the 24 m remaining coal pillar is the highest,reaching 48.8 MPa,which has the potential to induce rock burst;as the width of coal pillar increases,the stress peak gradually decreases.When the coal pillar width is 200 m,the stress distribution of coal pillar exhibits a plateau pattern;the influence range of remaining coal pillar in goaf of Lower1 coal seam in terms of strike and dip is 45 m and 20 m below and on both sides of coal pillar,respectively.The research results can provide references for the identification of remaining coal pillars in goaf of multiple coal seams,as well as for the prevention and control of rockburst in the affected areas of underlying coal seams passing through the remaining coal pillars.关键词
遗留煤柱/数值模拟/理论计算/冲击地压/防治技术Key words
remaining coal pillar/numerical simulation/theoretical calculation/rock burst/prevention and control technology分类
矿业与冶金引用本文复制引用
王帅,郭文豪,雒军利,温颖远,管伟明,张晓雷,张禹,郭继森..多煤层开采采空区遗留煤柱判识及防冲技术研究[J].煤炭科技,2025,46(6):213-217,5.基金项目
国家自然科学基金资助项目(52274098) （52274098）
国家级大学生创新训练(202410755014) （202410755014）
新疆维吾尔自治区重点研发任务专项(2022B01034) （2022B01034）
