深破碎软岩中道路的分类支持技术:案例研究

IF 1.5 4区 工程技术 Q3 METALLURGY & METALLURGICAL ENGINEERING Mining, Metallurgy & Exploration Pub Date : 2024-07-19 DOI:10.1007/s42461-024-01048-5
Jieyang Ma, Shihao Tu, Hongsheng Tu, Kaijun Miao, Long Tang, Hongbin Zhao, Benhuan Guo
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引用次数: 0

摘要

本文探讨了破碎软岩深部巷道的围岩控制问题。以张双楼煤矿 21914 工作面掘进巷道为例。通过理论分析和数值模拟,分析了巷道围岩的变形特征和破坏机理。提出了一种分级支护技术,并将其应用于所研究的巷道。研究表明,高应力、采矿扰动和软岩的力学特性导致了长时间的大变形,从而导致了软岩中深巷道的破坏。巷道变形与层间断裂煤厚度呈正相关,与断裂砂质泥岩厚度呈负相关。本文提出了以围岩状态识别、参数确定、分级支护为主要步骤的分级支护技术,主要支护措施有增加注浆、螺栓、锚索、钢带、钢梁、梯形棚等。现场工作表明,分级支护能有效抑制围岩的大变形。这项研究可为类似条件下其他巷道的稳定性控制提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Classification Support Technology for Roadways in Deep Broken Soft Rock: A Case Study

This paper addresses the surrounding rock control problem of deep roadways in broken soft rock. The 21914 working face haulage roadway in the Zhangshuanglou coal mine was taken as a case study. The deformation characteristics and failure mechanisms of the roadway surrounding rock were analysed via theoretical analysis and numerical simulation. A classification support technology was proposed and then applied to the studied roadway. This study indicated that the high stresses, mining disturbances and mechanical properties of soft rock resulted in large deformations developed over long periods, leading to the destruction of the deep roadway in the soft rock. The failure depth of the upper goaf floor was 15.84 m, and the development radius of the plastic zone during roadway excavation was 9.55 m. The roadway deformation was positively correlated with the thickness of the interbedded fractured coal and negatively correlated with the thickness of the fractured sandy mudstone. This paper proposed a classification support technology with the main steps of surrounding rock status identification, parameter determination and graded support; the chief support measures were the addition of grout, bolts, anchor cables, steel strips, steel beams and trapezoidal sheds. The field work showed that classification support could effectively restrain the large deformation of the surrounding rock. This research can provide a reference for the stability control of other roadways under similar conditions.

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来源期刊
Mining, Metallurgy & Exploration
Mining, Metallurgy & Exploration Materials Science-Materials Chemistry
CiteScore
3.50
自引率
10.50%
发文量
177
期刊介绍: The aim of this international peer-reviewed journal of the Society for Mining, Metallurgy & Exploration (SME) is to provide a broad-based forum for the exchange of real-world and theoretical knowledge from academia, government and industry that is pertinent to mining, mineral/metallurgical processing, exploration and other fields served by the Society. The journal publishes high-quality original research publications, in-depth special review articles, reviews of state-of-the-art and innovative technologies and industry methodologies, communications of work of topical and emerging interest, and other works that enhance understanding on both the fundamental and practical levels.
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