Study on Width Optimization of Sectional Coal Pillar in Pingshuo No. 3 Underground Mine
Abstract：The width of the sectional coal pillar would be an important factor affected to the surrounding stability of the mining gateway. The width of the sectional coal pillar in coal mining face of Pingshuo No. 3 Underground Mine is an experienced value of 20 m. In order to optimize the width of the sectional coal pillar and to improve the resources recovery rate, a site measurement, theoretical calculation and numerical simulation method were applied to study the width of the rational sectional coal pillar in Pingshuo No. 3 Underground Mine. The stress measurement of the coal pillars showed that the 20 m width coal pillar between No. 9104 coal mining face and No. 9105 coal mining face in No. 3 Underground Mine could have certain surplus. According to the ultimate balanced theoretical calculation and the numerical simulation results, the rational width of the sectional coal pillar in Pingshuo No. 3 Underground Mine should be over 12 m.
Keywords：sectional coal pillarwidth of coal pillarcoal pillar stressseismic CT detectionnumerical simulation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 45-48 )