ORIGINAL RESEARCH article
Front. Mater.
Sec. Structural Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1629892
This article is part of the Research TopicAdvanced Materials and Technologies for Sustainable Development of Underground Resources - Volume IIView all articles
Experimental study on dynamic characteristics and energy dissipation of weakly cemented rock-like materials
Provisionally accepted
- 1Anhui University of Science and Technology, Huainan, China
- 2Anhui Jianzhu University, Hefei, China
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The structural stability of coal seam roof rock mass under dynamic load in engineering practice is directly influenced by the dynamic characteristics of weakly consolidated coal measures rock. A study was conducted on two types of rocks, mudstone and siltstone, around the roof of coal seam No. 31 in Renlou Coal Mine, northern Anhui Province. Rock-like specimens were created using similar materials for analysis. The mechanical properties, energy dissipation characteristics, and fractal characteristics of these rocks were investigated using a 75mm Split Hopkinson Pressure Bar (SHPB) test system at five different impact velocities. The findings are as follows: (1) As the impact velocity increases, the strain rate of the rock linearly increases while the dynamic uniaxial compressive strength exponentially increases. ( 2) With an increase in strain rate, there is a negative correlation between rock fragmentation and a positive correlation with the number of fragments produced; additionally, the fractal dimension shows an increasing quadratic term function relationship. (3) There exists a linear positive correlation between incident energy and impact velocity; moreover, as incident energy increases, so does the amount of energy lost due to rock breakage. These research results provide both theoretical and experimental foundations for mine dynamic disaster protection.
Keywords: weakly consolidated rock, Strain rate effect, Dynamic response, energy dissipation, Fractal characteristic
Received: 16 May 2025; Accepted: 06 Jun 2025.
Copyright: © 2025 Shi, Yao, Wu and Meng. 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: Duoxi Yao, Anhui University of Science and Technology, Huainan, China
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