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The Principle and Practice of Strong Mine Pressure Control in the Initial Mining and Caving Stages under Multiple Key Strata

Author

Listed:
  • Kaijun Miao

    (State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Dapeng Wang

    (State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China
    Shanxi Jinshen Shaping Coal Mining Co., Ltd., Xinzhou 036500, China)

  • Shihao Tu

    (State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Hongsheng Tu

    (State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Defu Zhu

    (Key Laboratory of In-Situ Property-Improving Mining of the Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China)

  • Xuewen Liu

    (Shanxi Jinshen Shaping Coal Mining Co., Ltd., Xinzhou 036500, China)

  • Wenlong Li

    (State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Long Tang

    (State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

Abstract

The mechanism of strong mine pressure control in the initial mining and caving stages under multiple key strata (MKS) was studied by theoretical analysis, numerical simulation and field measurement in order to avoid the dynamic pressure accidents caused by the MKS breaking in interactions in the initial mining and caving stage. Panel 13103 (P13103) in the Shan Xi Jinshen Shaping Coal Mine was used sas the study site. The overlying structure and the breaking characteristics of the key strata were analyzed and the overlying structure model of longwall top-coal caving (LTC) under MKS was established. Reasonable initial mining heights and initial caving positions were determined and the spatial and temporal characteristics of ground pressure and roof structure of the working face in the mining process were obtained. The results show that, in the scheme of starting top-coal caving after the working face advanced 20 m, the support damage ratios were all greater than 50% with roof weighting, which is prone to induce prop crash accidents. The dynamic load formed by the second weighting was greater than first weighting under the MKS. The duration of mine pressure tended to be stable with fully developed caving zone heights. With the designed mining scheme, the safe and efficient mining of P13103 is guaranteed.

Suggested Citation

  • Kaijun Miao & Dapeng Wang & Shihao Tu & Hongsheng Tu & Defu Zhu & Xuewen Liu & Wenlong Li & Long Tang, 2022. "The Principle and Practice of Strong Mine Pressure Control in the Initial Mining and Caving Stages under Multiple Key Strata," Sustainability, MDPI, vol. 14(10), pages 1-14, May.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:10:p:5772-:d:812495
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    References listed on IDEAS

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    1. Yiwen Lan & Rui Gao & Bin Yu & Xiangbin Meng, 2018. "In Situ Studies on the Characteristics of Strata Structures and Behaviors in Mining of a Thick Coal Seam with Hard Roofs," Energies, MDPI, vol. 11(9), pages 1-10, September.
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    Cited by:

    1. Wenda Wu & Guorui Feng & Xiuxiu Yu & Jianbiao Bai & Xiangyu Wang & Xiangzhuo Zhao, 2023. "Investigation into Pressure Appearances and Hydraulic Fracturing Roof-Cutting Technology in Mining Working Face under Residual Pillars: A Case Study," Energies, MDPI, vol. 16(9), pages 1, May.

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