大采高工作面末采深孔预注浆加固技术
Deep-hole Pre-grouting Reinforcement Technology in Final Mining of Working Face with Large Mining Height
郭师军1
作者信息
- 1. 山西晋煤集团晟泰能源投资有限公司机电安装分公司,山西 晋城 048000
- 折叠
摘要
针对寺河矿大采高工作面末采期间煤壁片帮冒顶问题,对寺河矿 5303 工作面超前支承压力分布规律、深孔预注浆加固机理、合理注浆加固时机进行了深入分析,通过优选注浆材料及工艺,提出了超前深孔预注浆、撤架通道预注浆、工作面浅孔注浆耦合加固方案.实践表明,深孔预注浆加固方案的应用效果良好,末采期间煤帮基本保持平整,未出现大范围、大深度的片帮现象,工作面最后15m仅用 3d时间便顺利回采完成,有效确保了支架回撤期间生产的安全性.
Abstract
In response to the problem of roof fall during the final mining period of the working face with large mining height in Sihe Coal Mine,in-depth analysis of the distribution law of advanced support pressure,deep hole pre-grouting reinforcement mechanism,and reasonable grouting reinforcement timing of 5303 working face in Sihe Coal Mine was carried out,and though optimizing the grouting materials and processes,a coupling reinforcement scheme of advanced deep-hole pre-grouting,pre-grouting of the removal channel,and shallow-hole grouting of the working face was proposed.Practice showed that the deep-hole pre-grouting reinforcement achieved good application results;during the final mining period,the coal slope was basically flat,and there was no large-scale or deep fragmentation phenomenon;the last 15 m of the working face was successfully mined in just 3 d,ensuring safe production during the support withdrawal period.
关键词
工作面末采/煤壁片帮/深孔预注浆Key words
final mining of working face/coal wall caving/deep-hole pre-grouting引用本文复制引用
出版年
2024
NETL
NSTL
万方数据