Title: Numerical simulation about influences of steep inclined coal pillar after mining on laneway
Abstract:In order to improve the recovery and economic benefit of the coal mine,ANSYS finite element software is adopted to make numerical simulation for-230~-310 level coal pillar before and after mining,aimi...In order to improve the recovery and economic benefit of the coal mine,ANSYS finite element software is adopted to make numerical simulation for-230~-310 level coal pillar before and after mining,aiming at No.4 groove coal pillar of Changgouyu mine,and it is obtained:(1)After coal pillar mining,total of coal and rock mass is sinking,but it has little influence to-140 level laneway.(2)After mining,the middle position of coal pillar is transition region,and the principal stress above the middle of coal pillar decreases,where is safety area;the principal stress below the middle of coal pillar increases with the increase of depth;the principal stress of coal pillar nearby-320 level after mining is more than 2 times of which before mining,where is the place principal stress of coal pillar after mining is the biggest,so it is quite important region for mining.(3)The principal stress of coal pillar nearby-140 level after mining increases,which is 1.6 times of that before mining,and the place where its principal stress is bigger,so it is necessary to strengthen the coal pillar nearby-140 level properly before mining.Results obtained by numerical simulation agree well with actual mining,so numerical simulation about influences of steep inclined coal pillar after mining on laneway has certain guiding significance for mining.Read More
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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