Analysis of surrounding rock macro stress arch-shell of longwall face in steeply dipping seam mining
Abstract：Based on the results of the physical simulation experiments and numerical simulation of steeply dipping seam mining,the mechanics characteristic of surrounding rock MSAS was analyzed,it was thought that the MSAS was formed under the action of rock self-organization after the stress distribution in mining,and was the high stress form which has the function of bearing the main load in the surrounding rock,it is the spatial distribution of intensity envelope line under the strength criterion and has the geometry shape asymmetry and the stress distribution heterogeneity.The analyzing model was constructed and the configuration equation was educed,the stability criterion of the MSAS was given.The key parts of instability mainly have three failure forms,which are the tensile instability in shell roof,the compress-shear instability in shell shoulder and the multiple instability in shell base.According to the instability process of key parts of the MSAS,instability mode of the MSAS was divided into shell base-roof（shoulder） instability mode and shell roof（shoulder）-base instability mode.
Keywords：macro stress arch-shellanalyzing modelconfiguration equationstability criterioninstability mode
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：6( 559-564 )