埋深对残留煤柱下近距离煤巷稳定性的影响

    Influence of Burial Depth on Stability of Close Coal Roadway Under Residual Coal Pillar

    • 摘要: 结合鑫瑞煤矿4号和5号近距离煤层生产地质条件,采用数值计算的方法,揭示埋深对单煤柱、双煤柱及煤柱群下近距离煤层巷道变形的影响规律,结果表明,残留煤柱下巷道出现大变形,采空区下巷道变形较小,煤柱与采空区交界下巷道变形最小。随着埋深从100 m增加到700 m,残留煤柱下及靠近残留煤柱采空区下巷道围岩变形量显著增大。

       

      Abstract: In combination with production geological conditions in Xinrui Coal Mine No.4 and No.5 coal seams, with the method of numerical calculation, we revealed the influence of the buried depth on the roadway deformation under close single, double coal pillar and the coal pillar group. Results show that deformation of roadway under the residual coal is large, and deformation of roadway under goaf is small, deformation of roadway under the border of pillar and goaf is minimal. As the depth increased from 100 m to 700 m, deformation of roadway under coal pillar and goaf nearby the coal pillar increases significantly.

       

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