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Study on Rule of Overburden Failure and Rock Burst Hazard under Repeated Mining in Fully Mechanized Top-Coal Caving Face with Hard Roof

Author

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  • Feng Cui

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazard Prevention of China Ministry of Education, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Coal Resource Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi’an 710021, China)

  • Shuai Dong

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Xingping Lai

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazard Prevention of China Ministry of Education, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Jianqiang Chen

    (Shenhua Xinjiang Energy Ltd., China Energy, Wulumuqi 830027, China)

  • Jiantao Cao

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazard Prevention of China Ministry of Education, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Pengfei Shan

    (Energy School, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazard Prevention of China Ministry of Education, Xi’an University of Science and Technology, Xi’an 710054, China)

Abstract

The dynamic disasters caused by the failure of hard roof in the process of mining coal seriously affect the safe production in coal mines. Based on the W1123 mining coal working face of Kuangou coal mine, the physical similar material simulation experiment and acoustic emission (AE) monitoring method are used to study the failure law and AE characteristics of overburden in the process of coal mining. The stress evolution law is revealed through numerical simulation, the dangerous areas and rock burst hazard under the repeated mining with hard roof are studied combined with microseismic monitoring on site. The results show that the energy of W1123 working face released by the overburden damage under B4-1 solid coal is higher than that of the gob, and the peak value of the AE energy appears near the W1145 open-off cut. Through the statistics of the AE data, the large energy rate of AE event is defined, and the AE events with large energy rate appear in the scale of 82.4–231.2 cm within the model. This area is shown as a stress superposition area according to the numerical simulation. On the basis of comparing with the characteristics of energy distribution in the field, it is considered that the main control factors of rock burst in this area are hard roof of the working face and the stress concentration caused by the repeated mining. It provides a scientific guidance for the prevention and control measures of rock burst in this type of mining condition.

Suggested Citation

  • Feng Cui & Shuai Dong & Xingping Lai & Jianqiang Chen & Jiantao Cao & Pengfei Shan, 2019. "Study on Rule of Overburden Failure and Rock Burst Hazard under Repeated Mining in Fully Mechanized Top-Coal Caving Face with Hard Roof," Energies, MDPI, vol. 12(24), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:24:p:4780-:d:298189
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    References listed on IDEAS

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    1. Wenlong Shen & Meng Wang & Zhengzheng Cao & Faqiang Su & Hua Nan & Xuelong Li, 2019. "Mining-Induced Failure Criteria of Interactional Hard Roof Structures: A Case Study," Energies, MDPI, vol. 12(15), pages 1-17, August.
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    Cited by:

    1. Yi Yang & Xinwei Li & Huamin Li & Dongyin Li & Ruifu Yuan, 2020. "Deep Q-Network for Optimal Decision for Top-Coal Caving," Energies, MDPI, vol. 13(7), pages 1-14, April.
    2. Qiang Fu & Ke Yang & Xiang He & Zhen Wei & Qinggan Yang, 2022. "Characteristics of Strata Behavior and Differentiated Control of Fully Mechanized Mining Working Face with Abnormal Roof," Sustainability, MDPI, vol. 14(20), pages 1-15, October.
    3. Aleksander Frejowski & Jan Bondaruk & Adam Duda, 2021. "Challenges and Opportunities for End-of-Life Coal Mine Sites: Black-to-Green Energy Approach," Energies, MDPI, vol. 14(5), pages 1-18, March.
    4. Wen Zhai & Wei Li & Yanli Huang & Shenyang Ouyang & Kun Ma & Junmeng Li & Huadong Gao & Peng Zhang, 2020. "A Case Study of the Water Abundance Evaluation of Roof Aquifer Based on the Development Height of Water-Conducting Fracture Zone," Energies, MDPI, vol. 13(16), pages 1-16, August.
    5. Wenlong Li & Shihao Tu & Hongsheng Tu & Xun Liu & Kaijun Miao & Hongbin Zhao & Jieyang Ma & Long Tang & Yan Li, 2022. "A New Method to Assess Thick, Hard Roof-Induced Rock Burst Risk Based on Mining Speed Effect on Key Energy Strata," Sustainability, MDPI, vol. 14(22), pages 1-19, November.
    6. Qingying Cheng & Bingxiang Huang & Luying Shao & Xinglong Zhao & Shuliang Chen & Haoze Li & Changwei Wang, 2020. "Combination of Pre-Pulse and Constant Pumping Rate Hydraulic Fracturing for Weakening Hard Coal and Rock Mass," Energies, MDPI, vol. 13(21), pages 1-22, October.
    7. Feng Cui & Chong Jia & Xingping Lai & Yanbing Yang & Shuai Dong, 2020. "Study on the Law of Fracture Evolution under Repeated Mining of Close-Distance Coal Seams," Energies, MDPI, vol. 13(22), pages 1-20, November.
    8. Feng Cui & Shuai Dong & Xingping Lai & Jianqiang Chen & Chong Jia & Tinghui Zhang, 2020. "Study on the Fracture Law of Inclined Hard Roof and Surrounding Rock Control of Mining Roadway in Longwall Mining Face," Energies, MDPI, vol. 13(20), pages 1-22, October.

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