A new downgrading system for weak rock mass

IF 7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

International Journal of Rock Mechanics and Mining Sciences Pub Date : 2025-02-01 DOI:10.1016/j.ijrmms.2025.106028

Hao Zhai, Ismet Canbulat, Chengguo Zhang, John Watson, Min Gao

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引用次数: 0

Abstract

Estimating the strength of weak rock mass is challenging in rock mechanics and rock engineering. This study introduces the development of a downgrading system for weak rock mass strength (GSI_w), a novel methodology designed to bridge the gap between soil and hard rocks. A conceptual model is proposed, which simplifies weak rock mass downgrading by considering the influence of the rock matrix, joint distribution, and surface conditions. This model provides a systematic framework for interpreting weak rock mass properties as a function of intact rock and discontinuity influences. Additionally, rock mass properties obtained from both Australian open-cut coal mines and literature are utilised to derive the best-fit surface for interpretation. The proposed GSI_w system provides a reliable and applicable tool for estimating weak rock mass strength. To facilitate its practical application, a guideline is outlined, and two case studies are presented alongside the final GSI_w chart.

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来源期刊

International Journal of Rock Mechanics and Mining Sciences 工程技术-工程：地质

CiteScore

14.00

自引率

5.60%

发文量

196

审稿时长

18 weeks

期刊介绍： The International Journal of Rock Mechanics and Mining Sciences focuses on original research, new developments, site measurements, and case studies within the fields of rock mechanics and rock engineering. Serving as an international platform, it showcases high-quality papers addressing rock mechanics and the application of its principles and techniques in mining and civil engineering projects situated on or within rock masses. These projects encompass a wide range, including slopes, open-pit mines, quarries, shafts, tunnels, caverns, underground mines, metro systems, dams, hydro-electric stations, geothermal energy, petroleum engineering, and radioactive waste disposal. The journal welcomes submissions on various topics, with particular interest in theoretical advancements, analytical and numerical methods, rock testing, site investigation, and case studies.