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Research on comprehensive evaluation for grouting effect of broken and soft floor

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Abstract

We study grouting effects of soft and crushing floors using the Fenyuan Coal Company’s mine as an experimental mine. We employ physical exploration, hole inspection, the permeability coefficient, and P-Q-t to evaluate the grouting effects of floor undulation while water inflows are monitored. The results show that the rich water area disappears and builds resistance after grouting. The integrity of the floor strata is improved, and inflows of water into the hole are reduced by 93.3% after grouting. The permeability coefficient of the strata is measured as 1.62 × 10–5 ~ 1.74 × 10–5 cm/s after grouting, the number of fractures is reduced to 35, and fracture widths are significantly decreased after grouting. Inflows of water through the face remain as 60 m3/h less than the drainage capacity of the face and thus meet safe mining requirements.

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Authors and Affiliations

  1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan, 610050, China

    Xiaolei Wang, Qirong Qin & Cunhui Fan

  2. SouthWest Petroleum University School of Geoscience and Technology, Chengdu, Sichuan, 610500, China

    Xiaolei Wang, Qirong Qin & Cunhui Fan

Authors
  1. Xiaolei Wang
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  2. Qirong Qin
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  3. Cunhui Fan
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Correspondence to Xiaolei Wang, Qirong Qin or Cunhui Fan.

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Wang, X., Qin, Q. & Fan, C. Research on comprehensive evaluation for grouting effect of broken and soft floor. Arab J Geosci 10, 420 (2017). https://doi.org/10.1007/s12517-017-3198-3

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  • DOI: https://doi.org/10.1007/s12517-017-3198-3

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