HOW HEIGHT OF THE WATERED COAL BEDDING IMPACTS ON THE MINE TUNNEL STABILITY
- Деталі
- Батьківська категорія: Геотехнічна механіка, 2015
- Категорія: Збірник наукових праць "Геотехнічна механіка" Випуск-123
UDC 622.831.332:551.24
Authors:
Molchanov A.N., D. Sc. (Tech.), (IPMP of the NAS of Ukraine)
Vinogradov Y.A., M.S. (Tech.), (IPMP of the NAS of Ukraine)
Abstract.
TheWestern Donbass area refers to one of the most complicated geological conditions. Due to the watering, the enclosing rocks are got soaked, mine tunnel contour losses its stability, and marginal rocks fall.
A computer simulation was used for studying changes in the stress field and permeability around the mine tunnels with the frame supports and roof bolting when a flooded coal brat was located in the roof. A series of numerical experiments were carried out with different distances between the mine roof and watered coal brat. Distributions of the estimated values of geomechanical parameters and zones with inelastic deformations around the mine tunnel are shown for the cases under the consideration. The values of the rocks filtration permeability in the mine roofs are compared for the cases with frame supports and roof bolting. It is shown that when the roof bolting is used, difference between the maximum and minimum stress field components decreases by 25-30% and permeability in the mine roof decreases by 25-35%. The roof bolting prevents fractures around the mine tunnel from further development, retains enclosing rocks in their natural, solid state, and increases the tunnel stability even when a watered coal brat is located in its roof.
Keywords:
water inflow into the mine tunnel, numerical methods, roof bolting.
References:
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About the authors:
Molchanov Aleksandr Nikolaevich, Doctor of Technical Sciences (D. Sc), Deputy Director of the institute, Institute for Physics of mining processes (IPMP NASU), Dnepropetrovsk, Ukraine, Ця електронна адреса захищена від спам-ботів. вам потрібно увімкнути JavaScript, щоб побачити її. .
Vinogradov Yuriy Alekseevich, Master of Sciences, engineer, Institute for Physics of mining processes (IPMP NAS of Ukraine), Dnepropetrovsk, Ukraine, Ця електронна адреса захищена від спам-ботів. вам потрібно увімкнути JavaScript, щоб побачити її. .