Study on influence of lithology on deformation and instability law of gas extraction boreholes
Sun Quanji
Hou Yujun
Yao Zhiyuan
Abstract：The lithology around gas extraction boreholes has a significant impact on deformation and instability of boreholes.Taking No.15103 working face of Wenzhuang Coal Mine as the research background,a physical and mathematical model was constructed using UDEC numerical simulation software to study the influence of different rock types of roof on the deformation and instability of extraction boreholes.The results indicate that when the roof rock is composed of fine-grained sandstone,siltstone,mudstone,limestone,and No.12 coal,the maximum horizontal and vertical displacement values of the surrounding rock gradually increase;drilling with small deformation and good stability is beneficial for gas extraction.
Keywords：gas extractionlithologydeformation and instability of boreholeUDECnumerical simulation
Publication Date：2025-10-30
Online Publishing Date：2025-11-27(First online date of this platform, not the publication date of the document)
Pages：5( 130-134 )