黑龙江科技大学学报2025，Vol.35Issue(5)：731-737,7.DOI:10.3969/j.issn.2095-7262.2025.05.007
采动影响下深部煤层应力的动态演化规律
Dynamic evolution law behind stress in deep coal seam under mining
孙海波 1张保勇 2宋志君 2宋宏宇3
作者信息
- 1. 黑龙江科技大学 安全工程学院,哈尔滨 150022||鸡西矿业集团有限责任公司 新发煤矿,黑龙江 鸡西 158100
- 2. 黑龙江科技大学 安全工程学院,哈尔滨 150022
- 3. 国家矿山安全监察局黑龙江局鸡西办公区,黑龙江 鸡西 158100
- 折叠
摘要
Abstract
This paper aims to explore the dynamic evolution characteristics of stress in deep coal seams under mining influence.The study combining the field data,analyzes the stress,displacement dis-tribution and evolution characteristics during the mining process with numerical simulation methods in No.29 coal seam in Xinfa Coal Mine.The results show that the stress in deep coal seams presents non-u-niform distribution during the mining process.In the presence of the working face mined from 0 to 500 m,the stress peak at the front end of the working face decreases from 13.11 MPa to 11.98 MPa,and the stress peak at the rear end of the working face increases from 16.03 MPa to 37.19 MPa.The dis-tance from the stress peak at the front end of the working face to the goaf ranges from 5 m to 57 m.The range of the stress-concentrated area is positively correlated with the mining length and the expansion speed gradually increases.However,the stress peak at the front end of the working face is much smaller than that of the stress-concentrated area at the rear end of the goaf.When the mining length of the work-ing face is less than 250 m,the maximum displacement of 0.63 m in the stope is located in the siltstone area at the upper left of the stope.When the mining length of the working face is greater than 250 m,the maximum displacement of 1.20 m is near the roof at the mining position of the working face.关键词
煤与瓦斯突出/深部煤层/采动应力/卸压范围/应力分布Key words
coal and gas outburst/deep coal seam/mining stress/pressure relief range/stress dis-tribution分类
矿业与冶金引用本文复制引用
孙海波,张保勇,宋志君,宋宏宇..采动影响下深部煤层应力的动态演化规律[J].黑龙江科技大学学报,2025,35(5):731-737,7.
