Abstract
Room-and-pillar coal mining is effective in the areas unsuitable for fully mechanized longwalling. This mining method has advantages and disadvantages. The application of the room-and-pillar technique to mining of thick coal seams in the conditions of high gas dynamic hazard is face \\d with such problems as impossibility of full-height extraction; heading without preliminary prediction of rock bursts and outbursts, or without early prevention of floor fracturing, etc. The ways to solve such problems in terms of coal mines in Kuzbass could be useful for mines in other regions.
Highlights
By expert estimates, to 30–40% of coal reserves in Kuzbass occur in subsoil areas unsuitable for fully mechanized longwalling
Such areas of coal seams are limited in size to 400–600 m, have irregular shapes and contain geological discontinuities
The method of room and pillar mining has been successfully used for many years in coal mines abroad (USA, Australia, South Africa), which is facilitated by easy ground conditions of coal strata and dynamic support of mining from the side of science and technology
Summary
To 30–40% of coal reserves in Kuzbass occur in subsoil areas unsuitable for fully mechanized longwalling. Such areas of coal seams are limited in size to 400–600 m, have irregular shapes and contain geological discontinuities. It is economically inefficient to use the system of longwall mining in such areas due to huge amount of assembling, low labor productivity and high cost of coal.
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