Research on the Effect of the Mine Waste Dump on the Stability of Tunnels Below in the Quangninh Coal Area by Numecical Method

  • VAN KIEN Dang Hanoi University of Mining and Geology, 18 Vien street, Hanoi, 100000
  • TRONG HUNG Vo Hanoi University of Mining and Geology, 18 Vien street, Hanoi, 100000
  • XUAN NAM Bui Hanoi University of Mining and Geology, 18 Vien street, Hanoi, 100000
  • HUU SA Nguyen Hanoi University of Mining and Geology, 18 Vien street, Hanoi, 100000
DOI: https://doi.org/10.29227/IM-2023-02-72
Keywords: mine pressure, mine waste dump, rock support behavior, inclined coal/rock mass layer, yielded zone

Abstract

Nowadays, there are many underground coal mines in Quang Ninh, Vietnam have been exploiting coal seams below the mine waste
dump such as Khe Cham II, Mong Duong, Mao Khe, and Ha Lam… Coal Company. Many mine waste dumps have reached the height
of dumping from 400m, especially up to over 400m. The rock mass pressure due to the weight of the rock mass in the mine waste dump
is considered an artificial pressure formed from the process of dumping soil and rock, it will be part of the pressure acting on the furnace
lines located under the mine waste dump. The paper presents the current status of the mine waste dump and the coal seams that have
been and will be exploited located below the mining waste dump in Cam Pha Quang Ninh and based on the actual conditions of the
Bang Nau, Khe Cham II coal mine waste dump. The studies used the 2D FEM RS2 program to create simulation models with the mine
waste dump to study the primary stress distribution in the rock mass. The objective of this study is to highlight the influence of the
relationship location of tunnels below with the inclined coal/rock mass layer on the rock support behavior of the underground tunnels
in the Quang Ninh coal area. The simulation results will help the consulting and construction companies to calculate the rock pressure
acting on the tunnels located under the mining waste dump.

Published
2023-12-28
How to Cite
Dang, V. K., Vo, T. H., Bui, X. N., & Nguyen, H. S. (2023). Research on the Effect of the Mine Waste Dump on the Stability of Tunnels Below in the Quangninh Coal Area by Numecical Method. Test, 1(2 (52), 49–56. https://doi.org/10.29227/IM-2023-02-72
Issue
Vol 1 No 2 (52) (2023): Inzynieria Mineralna
Section
ARTICLES

Copyright (c) 2023 VAN KIEN Dang,TRONG HUNG Vo,XUAN NAM Bui,HUU SA Nguyen

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