Title: The Technology of Strip Mining under Building Structures Based on the Key Strata Theory
Abstract: In order to solve the problem of recovering coal resources under ground buildings at Xixizhuang coal mine,combined with its geological,the position of the key strata and the interval of roofing breaking in the overlying strata of 5 coal seam are calculated by the key strata theory;the inferior key strata 2 is put forward as design basis because of the key strata is close to the ground,the mining width of strip mining is not more than 70m;combined with the influence of the recovery rate on the strip mining,the strip mining schemes are proposed,the stability of these schemes are checked by the pillar strength theory.The pillar stress and surface deformation of the schemes are analyzed by theoretical analysis and numerical simulation,then the reasonable schemes of strip mining are determined.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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