直壁半圆拱断面软岩巷道多级底鼓机理及控制

IF 6.7 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Lei Xu , Siyu Wang , Davide Elmo , Shuxue Ding
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引用次数: 0

摘要

底鼓是地下采矿中巷道破坏的一种典型形式,经常造成运输和通风问题,以及限制通行。虽然剪切诱发滑移是巷道围岩的主要破坏方式,但现有研究尚未从全方位围岩运动源识别和主滑移区控制的角度认识其机理,导致支护类型和支护参数的选择缺乏科学依据。因此,控制底鼓失败的报道屡屡发生,严重的情况下,由于岩层完全抬升,巷道完全关闭。为实现巷道底鼓的精确控制,采用高分辨率Flac3D数值模型,结合应力释放模拟技术、钻孔成像技术和多层压拱理论。成功地重建了底鼓的发生和演化过程,准确地描述了主滑移带的形态和位置以及围岩结构。与传统控制理论相比,本研究取得了以下主要成果:创新地将主滑移带的滑移位移确定为关键控制目标;通过抑制主滑移带的滑移,促进了多层压拱的形成,从而实现了综合围岩的稳定。该研究提供了一种准确的主滑移位置计算方法,可以更有效地指导支护体系和支护参数的选择。该方法已在内蒙古上海庙煤矿11500带式输送机巷道成功验证。该控制策略代表了从经验到精确的底鼓管理的飞跃,建立了巷道稳定控制的新范式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mechanism and control of multi-level floor heave in soft rock roadway with straight-wall semicircular arch section
Floor heave is a typical form of roadway damage in underground mining, often causing transportation and ventilation issues, as well as restricted access. While shear-induced slip is universally acknowledged as the predominant failure mode in roadway surrounding rock, existing research has not recognized the mechanism from the perspective of full-range surrounding rock movement source identification and main slip zone control, resulting in a lack of scientific basis for selecting support types and parameters. Therefore, failures in controlling floor heave are frequently reported, with severe cases exhibiting complete roadway closure due to fully uplifted strata. To achieve precise control of roadway floor heave, a high-resolution Flac3D numerical model incorporating stress-release simulation technology, borehole imaging, and multi-layer compressive arch theory was employed. The initiation and evolution of floor heave were successfully reconstructed, with the morphology and location of the main slip zone as well as the surrounding rock structure being accurately characterized. In contrast to conventional control theories, this study presents the following key findings: The slip displacement in the main slip zone is identified innovatively as the critical control target. By suppressing the slip of the main slip zone, the formation of the multi-layer compressive arch is promoted, and thereby the stability of the comprehensive surrounding rock can be achieved. This study provides an accurate calculation method for the location of the main slip, which can more effectively guide the selection of the support systems and parameters. The proposed method was successfully validated in the 11,500 belt conveyor roadway of Shanghaimiao Coal Mine, Inner Mongolia, China. This control strategy represents a leap from empirical to precision-based floor heave management, establishing a new paradigm in roadway stability control.
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来源期刊
Tunnelling and Underground Space Technology
Tunnelling and Underground Space Technology 工程技术-工程:土木
CiteScore
11.90
自引率
18.80%
发文量
454
审稿时长
10.8 months
期刊介绍: Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.
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