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Year 2021
 
Issue 4+5+6 [11 - 2021], Year XXX

Study to improve the efficiency of coal mine drift roadway support in the thin-layered rock mass at -80 level, 9b seam of Mao Khe coal mine company by using rockbolts

https://mij.hoimovietnam.vn/en/archives?article=21043

  • Affiliations:

    Trường Đại học Mỏ-Địa chất

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  • Received: 21st-May-2021
  • Revised: 25th-May-2021
  • Accepted: 20th-June-2021
  • Online: 30th-Nov-2021
Pages: 22 - 28
Views: 94
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Abstract:

The behavior of the thin-layered rock mass is completely different in comparing with rock mass due to the low bonding strength of the interfaces. Observation the supporting at the roadway in -80 level, 9B seam Mao Khe coal mine company by using the reinforced plastic bolts combined with sprayed concrete showed that there was unanchored and local failure. The reason is that the friction force in the interfaces is reduced in strength, increasing the deflection of the rock layered, leading to a decrease in the self-loading capacity of the rock mass, causing instability for roadway. In order to improve the effectiveness of supporting the roadway using rock bolts and shotcrete, it is necessary to propose the designing and network of rock bolts in accordance with the layering characteristics of the rock mass around the roadway. Based on the current status of the supporting for roadway of the -80 level, 9B seam of Mao Khe coal mine and the field survey results, the designing and arranging of rock bolts network have proposed to improve the efficiency of supporting system and increase the stability of the roadway during the production service of the mine.

How to Cite
Nguyen, H.Phi 2021. Study to improve the efficiency of coal mine drift roadway support in the thin-layered rock mass at -80 level, 9b seam of Mao Khe coal mine company by using rockbolts (in Vietnamese). Mining Industry Journal. XXX, 4+5+6 (Nov, 2021), 22-28. .
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