ORIGINAL RESEARCH article
Front. Earth Sci.
Sec. Geohazards and Georisks
Volume 13 - 2025 | doi: 10.3389/feart.2025.1595035
This article is part of the Research TopicGeological Hazards in Deep Underground Engineering: Mechanism, Monitoring, Warning, and ControlView all 7 articles
Innovative Application of Optical Fiber Sensing Technology for Monitoring Stope Support Pressure Distribution in Similar Model Tests
Provisionally accepted
- Chongqing University, Chongqing, China
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In order to explore the support pressure distribution law in the coal and rock mass around the stope and rock masses under an extremely thick conglomerate layer and evaluate the feasibility of different monitoring techniques, the study established the geometric size of a similar physical model as 3.6 m (length) × 2.0 m (width) × 2.0 m (height) in the laboratory. The test used pulse prepumped Brillouin optical time domain analysis (PPP-BOTDA) and pressure sensor technology to monitor distribution law. We placed pressure sensors and sensing elements at the bottom plate of the model to simulate the support pressure distribution around the stope under the thick conglomerate layer. And used theoretical calculations and numerical simulations to conduct comparative analysis. The test results showed that the distributed optical fiber support pressure test system can be used to characterize the variation law of support pressure in the model test. Compared with the pressure sensor, it had a good corresponding relationship. Both of them were basically consistent with the theoretical calculation results and simulation. The optical fiber test had the advantages of high precision and strong anti-interference ability, which were not available in the electric sensor. It provided a new idea for the support pressure test of the model experiment.
Keywords: ：thick conglomerate layer, similar physical modeling, stope support pressure, Fiber optic sensing, Pressure sensor
Received: 17 Mar 2025; Accepted: 05 Aug 2025.
Copyright: © 2025 Li, Zhang, Chen, Hou, Shi, Qu, Yuan and Zhang. 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: Mingtian Zhang, Chongqing University, Chongqing, China
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