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Performance of New Inorganic Retarding Sealing Material for Gas Drainage Boreholes

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Abstract

Gas drainage in coal mines plays a fundamental role in preventing coal mine accidents, relieving environmental pollution and utilizing coalbed methane (CBM) resources. Since the quality of borehole sealing technology is the key to efficient gas drainage, it is of great significance to develop a sealing material with excellent performance to ensure the long-term high-efficiency operation of gas drainage boreholes. Based on an analysis and summary of currently available research findings, the idea of sealing boreholes with liquid materials was proposed in this study. Firstly, the new inorganic retarding sealing material was briefly introduced, and its properties were tested. Secondly, the self-designed crack grouting test system was applied to test the diffusion performance of the material. The experimental results showed that the new inorganic retarding sealing material was characterized by great stability, thermal stability, fluidity, and thixotropy. The flow and diffusion of selected grout with different water-cement ratios in cracks under different conditions provided guidance for the selection of grouting pressure and the judgment of grouting diffusion distance for on-site grouting. Through the field test of Chengjiao Coal Mine, the effect of sealing is significantly improved compared with traditional materials.

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Funding

This work was financially supported by the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX21_2457).

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Authors and Affiliations

  1. China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China

    Jianwei Cheng, Yu Wang, Yuhang Wu & Yuchen Wu

  2. China Coal Energy Research Institute Co. Ltd, Xian, 710000, Shanxi, China

    Gang Zhao

  3. Sichuan Provincial Coal Design & Research Institute, Chengdu, 610000, Sichuan, China

    Wancheng Zheng

  4. Jiangsu Tuohai Coal Mine Drilling Machinery Co. Ltd, Danyang, 212300, Jiangsu, China

    Hui Wang

  5. Xin Jiang Institute of Engineering, Urumqi, 830000, Xinjiang, China

    Weidong Lu

  6. Xuzhou Zhongkuang Hongan Technology Co. Ltd, Xuzhou, 221116, Jiangsu, China

    Huan Yang

  7. Qingdao University of Technology, Qingdao, 266033, Shandong, China

    Zhanyou Sa & Jie Liu

  8. South Dakota School of Mines and Technology, Rapid City, SD, 57701, USA

    Purushotham Thkkaraja

  9. AGH University of Science and Technology, 30-001, Krakow, Poland

    Marek Borowski

Authors
  1. Jianwei Cheng
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  2. Yu Wang
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  3. Gang Zhao
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  12. Purushotham Thkkaraja
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  13. Marek Borowski
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Correspondence to Jianwei Cheng.

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Cheng, J., Wang, Y., Zhao, G. et al. Performance of New Inorganic Retarding Sealing Material for Gas Drainage Boreholes. Mining, Metallurgy & Exploration 39, 1171–1187 (2022). https://doi.org/10.1007/s42461-022-00607-y

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  • DOI: https://doi.org/10.1007/s42461-022-00607-y

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