大断面回采巷道超前支护技术研究与应用
Research and application of advance support technology for large section entry
钟阳 1罗伙根1
作者信息
- 1. 国能神东煤炭集团有限责任公司 寸草塔二矿, 内蒙古 鄂尔多斯 017209
- 折叠
摘要
为探究大断面回采巷道超前支护技术,以寸草塔二矿 31205 工作面主运输巷道为工程背景,采用现场调研、理论力学分析、FLAC3D 数值模拟相结合的手段,分析了主动超前支护替换单体液压支柱的可行性,基于主动超前控制机理,提出了在顶板中央进行补强支护的超前支护技术方案.通过现场监测表明,主动超前支护下顶底板及两帮最大位移量分别为 21 mm和 23 mm;根据锚索轴力监测,主动超前支护锚索可以实现及时承载;且窥视结果表明巷道围岩完整性较好,验证了该方案的可行性,可以满足工作面安全高效的生产要求,推动工作面的智能化发展.
Abstract
To explore the advanced support technology for large section entry,with the main transportation entry of 31205 working face in Cuncaota No.2 Mine as the engineering background,on-site investigation,theoretical mechanics analysis,and FLAC3D numerical simulation were used to analyze the feasibility of replacing single hydraulic props with active advance support.Based on the mechanism of active advance control,a technical scheme of advance support for reinforcement in the center of the roof was proposed.Field monitoring indicated that the maximum displacement of the roof,floor and two sides under the active advance support were 21 mm and 23 mm,respectively.According to the monitoring of anchor cable axial force,the anchor cable of active advance support was timely loaded.Moreover,the drill-peeping results showed that the integrity of the surrounding rock was good,which verified the feasibility of the scheme.This technology can meet the requirements of safe and efficient production,and promote the intelligent development of working face.
关键词
巷道/主动超前支护/锚索支护/数值模拟Key words
entry/active advance support/anchor cable support/numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据