山东煤炭科技2024，Vol.42Issue(8)：11-15,5.DOI:10.3969/j.issn.1005-2801.2024.08.003
综采工作面预裂切顶卸压沿空留巷技术
Presplitting Roof Cutting Pressure Relief and Retaining Roadway Along Goaf Technology in Fully Mechanized Mining Face
麻方成1
作者信息
- 1. 山西寿阳潞阳祥升煤业有限公司,山西 寿阳 045400
- 折叠
摘要
Abstract
In order to improve resource recovery rate and reduce the failure rate of roadways,the technology of retaining roadway along goaf is carried out on the 3301 working face.The support scheme of"roof cutting pressure relief+reinforcement anchor cable support"is adopted,and theoretical calculations are carried out on the cutting depth,cutting angle,blasting hole charging method,failure radius and so on of presplitting boreholes.According to the different stress states in different areas of the working face during the stoping period,three stress zones are divided and targeted reinforcement support schemes are adopted.After observation and analysis,the maximum displacement amount of the roof of the retaining roadway along goaf is 144 mm,the heaving floor amount is 317 mm,and the maximum displacement amount of the two sides is 405 mm.The qualification rate of the anchor rod drawing force test reaches 81.2%.The cost of the retaining roadway along goaf after presplitting blasting is reduced by 645 yuan/m,and the effect is significant.关键词
综采/留巷/切顶/支护Key words
fully mechanized/retain roadway/roof cutting/support分类
矿业与冶金引用本文复制引用
麻方成..综采工作面预裂切顶卸压沿空留巷技术[J].山东煤炭科技,2024,42(8):11-15,5.
