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Design and Application of a Mining-Induced Stress Testing System

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Abstract

During the mining process, especially under the deep mining condition, damage process of coal and rock interacts with space–time evolution of mining-induced stress. The indoor test of evolution of mining-induced stress is an effective research approach. Based on the theoretical research of evolution of mining-induced stress in recent years, from the perspectives of the macroscopic failure characteristics and microscopic damage characteristics of coal and rock, a set of mining-induced stress testing system, combined with the non-uniform loading test machine, hydraulic servo control system, computer control system and acoustic emission system, is developed. The mining-induced stress testing system can realize that the non-uniform loading of large-size specimen, the space–time evolution of mining-induced stress, real-time monitoring of microscopic damage of coal and rock specimen, and so on. In order to verify the reliability and practicability of the system, stress transfer test at different rates was carried out. The study results reflected that the mining-induced stress testing system can be used to provide effective laboratory guidance and analysis for the evolution of mining-induced stress.

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Acknowledgements

This work is supported by the State Key Research Development Program of China under Grant No. 2016YFC0600708; the National Natural Science Foundation of China under Grant No. 51304126; State Key Laboratory of open funds under Grant Nos. SKLGDUEK1520 and MDPC201703; a Project of Shandong Province Higher Educational Science and Technology Program under Grant No. J15LH04; the Tai’shan Scholar Engineering Construction Fund of Shandong Province of China; the Tai’shan Scholar Talent Team Support Plan for Advanced & Unique Discipline Areas; Shan Dong University of Science and Technology Outstanding Young Investigator Award under Grant No. 2014JQJH105; Graduate Innovation Fund in College of Mining and Safety Engineering, Shandong University of Science and Technology, China under Grant No. KYKC17006; Fok Ying Tung Education Foundation under Grant No. 141046; China Postdoctoral Science Foundation under Grant No. 2013M541918.

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Authors and Affiliations

  1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China

    Zhen-long Zhao & Zhi-jie Wen

  2. State Key Laboratory for Geo Mechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing, 100083, China

    Zhi-jie Wen

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  1. Zhen-long Zhao
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  2. Zhi-jie Wen
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Correspondence to Zhi-jie Wen.

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Zhao, Zl., Wen, Zj. Design and Application of a Mining-Induced Stress Testing System. Geotech Geol Eng 36, 1587–1596 (2018). https://doi.org/10.1007/s10706-017-0412-8

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  • DOI: https://doi.org/10.1007/s10706-017-0412-8

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