ORIGINAL RESEARCH article
Front. Mater.
Sec. Mechanics of Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1612050
This article is part of the Research TopicMechanical Response and Failure Mechanism of Rock Under Dynamic Disturbance and WaterView all 4 articles
Research and optimization on the strength recovery mechanism of post peak fragmentation grouting reinforcement in mining rock mass
Provisionally accepted
- Xi'an University of Science and Technology, Xi'an, Shaanxi, China
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To reveal the strength recovery characteristics of grout-reinforced engineering rock masses, this study is based on the small coal pillar god-side entry of the Maiduo Mountain Coal Mine. Uniaxial compression tests were conducted on grout-consolidated samples, complete surrounding rock samples, and grout-reinforced samples of post-peak broken surrounding rock. The mechanical properties of grout-consolidated samples of four grouting materials, as well as the strength recovery characteristics, crack propagation, and energy evolution of grout-reinforced postpeak fractured rock samples with different consolidation times were investigated. The results show that, compared to samples reinforced with ordinary cement, fly ash cement, and portland cement, the grout-consolidated samples made with high-performance cement-based materials exhibit the best strength recovery effect at any consolidation time, without significant pressure release or fluctuation during compression. Compared to the initial complete rock samples, the stress, strain, ring count, and cumulative energy of grout-reinforced post-peak fractured rock samples are significantly reduced, and they exhibit a notable linear positive correlation with consolidation time.
Keywords: Surrounding rock of roadway, Post-peak fractured rock mass, Grouting reinforcement, Mechanical Properties, Strength recovery
Received: 15 Apr 2025; Accepted: 13 Jun 2025.
Copyright: © 2025 Shuai, Yao, Jiantao, Xingping and Longquan. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Sun Yao, Xi'an University of Science and Technology, Xi'an, 710048, Shaanxi, China
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