Title: Mining width to pillar with strip mining in coal seams with thick and hard roof
Abstract: Aimed at addressing a large area of roof overhang due to longwall mining of coal seams with thick and hard roof,this paper is a research on the reasonable widths of strip mining by using theoretical calculations and numerical simulation,based on the geological conditions of one mine in Heilongjiang province.The results show that the mining width of 30 m and the more reasonable width of 21.73 m meant for coal pillar,produce a more stable strip pillar.The theoretical calculation is consistent with the numerical simulation results.This result provides a basis for avoiding the roof collapse,and protecting the safety of the ground buildings and ensuring mine production.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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