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Study on Filling Support Design and Ground Pressure Monitoring Scheme for Gob-Side Entry Retention by Roof Cutting and Pressure Relief in High-Gas Thin Coal Seam

Author

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  • Hui Li

    (School of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China
    College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    Henan Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, Jiaozuo 454003, China)

  • Haodong Zu

    (School of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China)

  • Kanglin Zhang

    (School of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China)

  • Jifa Qian

    (School of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China)

Abstract

To ensure the successful application of roof cutting and pressure relief in the gob, to retain the roadway in a high-gas thin coal seam, by taking the 2109 working face of the Mingxin coal mine as the engineering background, this paper comprehensively analyzes and studies the key parameters of high-water material filling and support and the law of ground pressure behavior. The results show that the high-water material filling body has the characteristics of high strength, rapid resistance increase, strong flexibility and high strength in the later stage, which can meet the requirements for retaining roadway support along the goaf. On this basis, we determined that the water-cement ratio for a high-water material filling body is 1.5:1 and the filling length, height and width each time are 3.6 m, 2.2 m and 1.0 m, respectively. In addition, a ground-pressure monitoring scheme for retaining the roadway along the goaf is put forward and the results show that the displacement of the roof and floor and the deformation of the filling body are both within a reasonable range, which proves high-water material filling support can effectively ensure the stability and integrity of the roof of the gob, thus retaining the roadway in a high-gas thin coal seam.

Suggested Citation

  • Hui Li & Haodong Zu & Kanglin Zhang & Jifa Qian, 2022. "Study on Filling Support Design and Ground Pressure Monitoring Scheme for Gob-Side Entry Retention by Roof Cutting and Pressure Relief in High-Gas Thin Coal Seam," IJERPH, MDPI, vol. 19(7), pages 1-21, March.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:7:p:3913-:d:779391
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    References listed on IDEAS

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    1. Zhaowen Du & Shaojie Chen & Junbiao Ma & Zhongping Guo & Dawei Yin, 2020. "Gob-Side Entry Retaining Involving Bag Filling Material for Support Wall Construction," Sustainability, MDPI, vol. 12(16), pages 1-20, August.
    2. Weiping Jia & Xianwen Jia & Ling Wu & Yanbing Guo & Teng Yang & Ermei Wang & Pan Xiao, 2022. "Research on regional differences of the impact of clean energy development on carbon dioxide emission and economic growth," Palgrave Communications, Palgrave Macmillan, vol. 9(1), pages 1-9, December.
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    Citations

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    Cited by:

    1. Hongzhi Yang & Dongpan Wang & Wenjun Ju & Weiming Yuan & Chao Su, 2022. "Asymmetric Damage Mechanisms and Prevention Technology in Large-Section Gob-Side Entry Retaining," Sustainability, MDPI, vol. 15(1), pages 1-23, December.
    2. Xuming Zhou & Haotian Li & Xuelong Li & Jianwei Wang & Jingjing Meng & Mingze Li & Chengwei Mei, 2022. "Research on Gob-Side Entry Retaining Mining of Fully Mechanized Working Face in Steeply Inclined Coal Seam: A Case in Xinqiang Coal Mine," Sustainability, MDPI, vol. 14(16), pages 1-16, August.
    3. Shengrong Xie & Yiyi Wu & Fangfang Guo & Hang Zou & Dongdong Chen & Xiao Zhang & Xiang Ma & Ruipeng Liu & Chaowen Wu, 2022. "Application of Pre-Splitting and Roof-Cutting Control Technology in Coal Mining: A Review of Technology," Energies, MDPI, vol. 15(17), pages 1-20, September.

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