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Non-repeated advance support technology: a fully mechanized caving face in extra thick coal seam of North China

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Abstract

The stability of tailgate plays an important role in the safety mining of working face. In the present work, a tailgate of Tongxin mine in north Shanxi Province, China, has been taken as the research background; the non-repeated and long-distance advance support technology (NLAST) has been studied by theoretical analyses and field practice. The lateral overburden structure characteristics (LOSC) and interaction relationship with advance support device and surrounding rock have been studied by theoretical analyses, and the advance support mechanics model based on the support device-bolt coordinated operation has been established. Research results showed that the advance support strength (ASS) was not less than 280.77 kPa, the single-span type of support device was determined, and the advance support mechanism of “pre-active loading, one-time bearing, coordinated operating, overall supporting” was put forward. This way, a NLAST by using ZLQ2820/26.5/41.5 type of non-repeated advance support and transportation equipment was developed, and the main technical parameters and support schemes were analyzed. It was found that the roof separation amount and surrounding rock deformation of the tailgate were in the controllable range with the advance support technology, which can meet the requirements of advance support. The research results provide a new reference for the advance support of fully mechanized caving face (FMCF) in extra thick coal seam under similar geological conditions.

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Funding

This work was supported by the National Key Research and Development Program of China (2017YFC0804305), the Key Research and Development Program of Shanxi Province (201803D121005), and the Science & Technology Innovation and Entrepreneurship Fund Program of Tiandi Technology Co., Ltd. (2018-TD-QN040). Many thanks to academic editors and anonymous reviewers for their kind suggestions and valuable comments.

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Authors and Affiliations

  1. Taiyuan Branch, China Coal Research Institute, Taiyuan, 030006, China

    Bukang Wang & Qi Wang

  2. Taiyuan Institute of China Coal Technology and Engineering Group, Taiyuan, 030006, China

    Bukang Wang & Qi Wang

  3. Shanxi Tiandi Coal Machinery Co. Ltd, Taiyuan, 030006, China

    Bukang Wang & Qi Wang

  4. National Engineering Laboratory for Coal Mining & Excavation Machinery Equipment, Taiyuan, 030006, China

    Bukang Wang & Qi Wang

Authors
  1. Bukang Wang
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  2. Qi Wang
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Contributions

Conceptualization: B K.W. and Q.W.; data curation: Q. W.; funding acquisition: B K. W.; project administration: B K.W.; validation: B K. W. and Q.W.; writing of original draft: Q. W.; writing of review and editing: B K.W. and Q.W.

Corresponding author

Correspondence to Qi Wang.

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The authors declare no competing interests.

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Responsible Editor: Murat Karakus

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Wang, B., Wang, Q. Non-repeated advance support technology: a fully mechanized caving face in extra thick coal seam of North China. Arab J Geosci 14, 2056 (2021). https://doi.org/10.1007/s12517-021-08431-2

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  • DOI: https://doi.org/10.1007/s12517-021-08431-2

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