辽宁工程技术大学学报（自然科学版）2024，Vol.43Issue(2)：135-142,8.DOI:10.11956/j.issn.1008-0562.2024.02.002
大采高工作面覆岩运动与煤壁片帮规律
Overlying strata movement and rib spalling law of large mining height working face
摘要
Abstract
In order to explore the strata movement law and rib spalling mechanism of large mining height working face,three UDEC numerical models under different mining heights were established.The effects of mining height and support panel position on roof caving step distance,shape and rib spalling were analyzed,and the mechanical model of rib spalling was established.The results show that the first weighting step distance is less affected by the mining height,both of which are 45 m.The periodic weighting step distance decreases with the increase of mining height.The roof of the large mining height working face is easy to form a cantilever beam structure because the caving gangue cannot fill the goaf.The increase of mining height will increase the risk of rib spalling.The maximum roof pressure that the rib of the large mining height working face can withstand is calculated,and the criterion of rib slip failure is given.By establishing the numerical model of different positions of the guard plate,the optimal support position of the guard plate of the 8.8 m large mining height working face is obtained.The rib control method of increasing the horizontal thrust and support area of the guard plate is proposed,and the stability of the rib is effectively improved after field application.关键词
大采高/覆岩运动/煤壁片帮/煤壁控制Key words
high face mining/strata movement/rib spalling/coal wall control分类
矿业与冶金引用本文复制引用
何吉清,李猛,安博超,胡皓宇..大采高工作面覆岩运动与煤壁片帮规律[J].辽宁工程技术大学学报（自然科学版）,2024,43(2):135-142,8.基金项目
国家自然科学基金项目(51934008) （51934008）
