山东煤炭科技2024，Vol.42Issue(3)：48-52,5.DOI:10.3969/j.issn.1005-2801.2024.03.011
近距离条件下工作面开采大巷加固技术研究
Research on Reinforcement Technology of Mining Main Roadways in Working Faces under Close Distance Conditions
朱东旭 1王清华 2刘乐2
作者信息
- 1. 山东鲁泰控股集团有限公司鹿洼煤矿,山东 济宁 272350
- 2. 山东安实绿色开采技术发展有限公司,山东 济南 250032
- 折叠
摘要
Abstract
In view of the disturbance and damage caused to the lower roadway during the mining of the 33 lower 01 working face in Luwa Coal Mine,which affects the use of the lower roadway,numerical simulation combined with elastic mechanics theory is used to analyze the impact of working face mining on the lower roadway under close distance conditions.The range of disturbance impact is obtained,and a reinforcement support scheme of roof anchor cable and floor grouting is proposed for the disturbed area;use FLAC3D software to analyze the original support scheme and reinforcement support scheme in three aspects:surrounding rock stress,roadway displacement,and plastic zone.The results show that there is little change in the stress of the surrounding rock after reinforcement and support,and the peak value of the stress of each cutting plane is reduced by less than 1 MPa.Due to the equivalent support stress being much smaller than the original rock stress,it is difficult to simulate the impact effect;the displacement amount of the roadway roof decreases and stabilizes at around 40 mm;the plastic zone is significantly decreased.According to the on-site observation,the displacement amount of the roadway roof ultimately stabilizes at around 39 mm.Therefore,the reinforcement support scheme can provide a basis for the support method of the roadway under the condition of near the working face.关键词
近距离/巷道/支护/补强Key words
close distance/roadway/support/reinforcement分类
矿业与冶金引用本文复制引用
朱东旭,王清华,刘乐..近距离条件下工作面开采大巷加固技术研究[J].山东煤炭科技,2024,42(3):48-52,5.
