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Year 2022
 
Issue 1 [02 - 2022], Year XXXI

Research on the sudden collapse of an adit roof which has rectangular section with hard rock interleave soft rock on the roof

https://mij.hoimovietnam.vn/en/archives?article=22013

  • Affiliations:

    1 Quang Ninh University of Industry
    2 Vang Danh Coal Company Limited

  • *Corresponding:
    This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Received: 21st-June-2021
  • Revised: 28th-July-2021
  • Accepted: 5th-Aug-2021
  • Online: 28th-Feb-2022
Pages: 20 - 24
Views: 150
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Abstract:

Through the collected data on the sudden collapse of an adit roof wich has rectangular cross section with hard rock interleave with soft rock. To study, the paper uses numerical simulation method, the calculation results shows that the roof is relatively stable when it is not under the influence of mining, but when the operating pressure coefficient K=1 ,3, the 1 soft-clamp layer occurs shear failure, depending on the increasing influence of mining, the destroyed zone expands both upwards and downwards; when the coefficient K=1.9, the soft layer 2 is destroyed, when the coefficient K=2.2 the two destroyed zones are connected, the anchor loses its working efficiency. Finally, the destruction process shows the characteristic “developing from the inside to the outside, gradually accumulating energy then suddenly collapsing”, giving the relationship between the area of the roof destruction area and the dynamic pressure coefficient K as a quadratic function.

How to Cite
Vu, Q.Duc, Nguyen, T.Van and Nguyen, D.Van 2022. Research on the sudden collapse of an adit roof which has rectangular section with hard rock interleave soft rock on the roof (in Vietnamese). Mining Industry Journal. XXXI, 1 (Feb, 2022), 20-24. .
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