大断面回采巷道超前支护技术研究与应用

doi:10.11799/ce202403010

摘要/Abstract

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、FLAC^3D 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。

关键词: 巷道, 主动超前支护, 锚索支护, 数值模拟

Abstract: To explore the advanced support technology for large section gateroads, with the main transportation haulage roadway of 31205 working face in Cuncaota No. 2 Mine as the engineering background, a combination of on-site investigation, theoretical mechanics analysis, and FLAC numerical simulation was used to analyze the feasibility of replacing single hydraulic props with active advanced support. Based on the mechanism of active advanced control, a technical scheme of advanced 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 active advanced support were 21mm and 23mm, respectively. According to the monitoring of anchor rod force, the anchor rod of active advanced support can be timely loaded. Moreover, the visual 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.

中图分类号:

TD353

钟阳, 罗伙根. 大断面回采巷道超前支护技术研究与应用[J]. 煤炭工程, 2024, 56(3): 57-65.

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