强采动巷道卸压演化特征数值模拟
Numerical Simulation of Pressure Relief Evolution Characteris-tics in Strong Mining Roadway
刘勋 1张玲 2刘云强 3郭文婷4
作者信息
- 1. 山东能源集团有限公司,山东 济南 250014
- 2. 尤洛卡(山东)矿业科技有限公司,山东泰安 271200
- 3. 鄂托克前旗长城煤矿有限责任公司,内蒙古鄂尔多斯 016215
- 4. 山东大学齐鲁交通学院,山东济南 250000
- 折叠
摘要
强采动巷道卸压是常用的巷道保护措施,本文以某矿沿空留巷切顶为工程背景,利用Flac 3D软件建立沿空留巷切顶卸压模拟模型,对不同切顶高度和切顶后形成的悬臂长度下强采动巷道卸压效果进行研究.研究表明,沿空留巷靠近采空区一侧围岩应力受采空区影响较小,会出现类似"杠杆效应"现象;切顶卸压效果与切顶高度呈明显线性关系,切顶3m是最优切顶高度;卸压效果与悬臂长度关系较为复杂,且受采空区顶板变形后挤压充填体.
Abstract
The pressure relief of the strong mining roadway is a commonly used roadway protection measure.This article takes the roof cutting of the goaf retaining roadway in a certain mine as the engineering background,and uses Flac 3D software to es-tablish a simulation model of the roof cutting pressure relief of the goaf retaining roadway.The pressure relief effect of the strong mining roadway under different roof cutting heights and cantilever lengths formed after roof cutting is studied.Research has shown that the stress of the surrounding rock on the side of the goaf near the goaf is less affected by the goaf,and a phenom-enon similar to the"leverage effect"may occur;The pressure relief effect of top cutting is significantly linearly related to the top cutting height,with a top cutting height of 3 meters being the optimal top cutting height;The relationship between the pres-sure relief effect and the length of the cantilever is complex,and it is compressed and filled by the deformation of the goaf roof.
关键词
采动巷道/卸压/沿空留巷Key words
mining roadway/pressure relief/left alley along the goaf引用本文复制引用
出版年
2024
NETL
NSTL
万方数据