Detection of overburden stress based on dynamic pressure differential index of hydraulic support

IF 8.4 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Engineering Geology Pub Date : 2025-06-14 DOI:10.1016/j.enggeo.2025.108188

Like Wei , Deyi Jiang , Yulong Chen

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引用次数: 0

Abstract

Problems such as roof collapse and support crushing are frequently encountered in the working face and threatened safety of the working face. Therefore, understanding the overburden stress is crucial to hazard detection and mitigation in deep coal mining. The hydraulic support is in direct contact with the roof of the working face in the working space of the shearers, which can most comprehensively characterize the overburden stress in the coal seam roof. To fully detect the overburden stress in the entire range of the working face, online monitoring of the support resistance of hydraulic support is a valid alternative for working face management to enable the detection of overburden stress. This paper establishes a detection method of overburden stress by support resistance in terms of dynamic pressure differential index of support (DPDIS). The theoretical solution of DPDIS is derived. Furthermore, the spatial evolution of the DPDIS in coals in the working face is simulated. Finally, this DPDIS method is applied in an intelligent working face of a coal mine characterized by high gas content. The influence of stiffness, initial support and lagged distance of supports on the DPDIS is evaluated. The DPDIS could be effectively used to detect the concentrated stress in the coal in front of the working face is verified.

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基于液压支架动压差指标的覆岩应力检测

工作面经常发生顶板垮塌、支架破碎等问题，威胁着工作面的安全。因此，了解覆岩应力对深部开采危害的检测和缓解至关重要。液压支架在采煤机工作空间内与工作面顶板直接接触，可以最全面地表征煤层顶板上覆岩层应力。为了充分探测工作面全范围内的覆岩应力，对液压支架支架阻力进行在线监测是工作面管理实现覆岩应力检测的有效替代方案。本文建立了基于支架动压差指数（DPDIS）的支架阻力检测覆盖层应力的方法。推导了DPDIS的理论解。在此基础上，模拟了工作面煤中DPDIS的空间演化规律。最后，将该DPDIS方法应用于某高含气量煤矿的智能工作面。分析了刚度、初始支承和支承滞后距离对DPDIS的影响。验证了DPDIS可以有效地检测工作面前方煤体集中应力。

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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来源期刊

Engineering Geology 地学-地球科学综合

CiteScore

13.70

自引率

12.20%

发文量

327

审稿时长

5.6 months

期刊介绍： Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.