摘要
近距离煤层上下煤柱叠加,双煤柱稳定性关系到煤柱留设的成功,通过理论计算分别推导出内错时上窄下宽双层位煤柱的载荷与煤柱合理宽度计算公式。分析上窄下宽双层位煤柱稳定性影响因素为上下煤柱宽度比、上下煤层开采厚度比、上下煤层采空区宽度比,得出:随着下、上煤柱宽度比的增加,上窄下宽煤柱下煤柱荷载呈现递减,下、上煤柱宽度比一定时,下煤柱荷载随着采空区宽度增加而增大;随着采空区宽度的增加,上窄下宽煤柱下煤柱荷载呈现递增,采空区宽度一定时,下煤柱荷载随着下、上煤柱厚度比增加而增加;随着下、上煤柱厚度比增加,上窄下宽煤柱下煤柱荷载呈现递增,下、上煤柱厚度比一定时,下煤柱荷载随着下、上煤柱宽度比增加而降低。
The stacking of upper and lower coal pillars in close range coal seams and the stability of the double coal pillars are related to the success of coal pillar retention.Through theoretical calculation,the calculation formulas of the load and the reasonable width of the upper narrow and lower wide double-level coal pillar are derived respectively.It is concluded that the influencing factors of the stability of the upper narrow and lower wide double-level coal pillar are as follows:with the increase of the width ratio of the lower and upper coal pillar,the load of the lower coal pillar decreases gradually,while the width ratio of the lower and upper coal pillar is constant,with the increase of the width of the goaf,the load of the lower pillar increases with the increase of the width of the goaf,the load of the lower coal pillar increases with the increase of the thickness ratio of the lower and upper coal pillars,the load of the lower coal pillar increases with the increase of the thickness ratio of the lower and upper coal pillars,and the load of the lower coal pillar increases with the increase of the thickness ratio of the upper and upper coal pillars,the load of lower coal pillar decreases with the increase of width ratio of lower coal pillar and upper coal pillar.
作者
吴晓宇
周豪
吴晓伟
Wu Xiaoyu;Zhou Hao;Wu Xiaowei(College of Coal Engineering,Datong University,Datong Shanxi 037009,China;Jinneng Holding Coal Group Yongdingzhuang Coal Industry Co.,Ltd.,Datong Shanxi 037000,China)
出处
《山西冶金》
CAS
2024年第4期86-90,共5页
Shanxi Metallurgy
基金
山西省教育科学规划“十四五”规划课题(GH-220556)
山西省高等学校科技创新计划各类项目(2022L447)
山西大同大学基础青年科研基金项目(2022Q17)。
关键词
近距离煤层
内错开采
双层位煤柱稳定性
煤柱宽度
采空区
煤柱荷载
close-distance coal seam
out-staggered mining
stability of double-level coal pillar
coal pillar width
gob area
pillar load
