近距离煤层内错开采上下双层位煤柱稳定性研究
Study on Stability of Upper and Lower Double-seam Pillar in Staggered Mining out of Close-distance Coal Seam
吴晓宇 1周豪 1吴晓伟2
作者信息
- 1. 山西大同大学,山西 大同 037009
- 2. 晋能控股煤业集团永定庄煤业有限责任公司,山西 大同 037000
- 折叠
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.
Abstract
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.
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Key words
close-distance coal seam/out-staggered mining/stability of double-level coal pillar/coal pillar width/gob area/pillar load引用本文复制引用
基金项目
山西省教育科学规划课题(十四五)(GH-220556)
山西省高等学校科技创新计划(2022L447)
山西大同大学基础青年科研基金(2022Q17)
出版年
2024
NETL
NSTL
万方数据