Stress distribution and control of surrounding rock of large-section roadway in deep coal mine
QIN Qingju
YIN Shuaifeng
WANG En
ZHAO Xubo
KANG Qingtao
ZHENG Xinjian
Abstract：In response to the difficulty of controlling surrounding rock of large-section roadways in deep coal mines,the deformation and failure mechanism of roadway and its control technology are studied by means of on-site measurement,numerical simulation,theoretical analysis,engineering practice,with the deep coal mine of tailgate in Qianyingzi coal mine as the engineering background.The key influencing factors that induce in-stability and failure of roadway surrounding rock are analyzed,and the maximum horizontal stress is obtained through crustal stress testing,with an angle of 78° with the axial direction of roadway.The distribution and evolution characteristics of stress and displacement fields in tailgate are obtained through numerical simulation.The average distance between the peak support pressure and the roadway is determined to be 7.875 m,revea-ling the mechanism of distortion and instability in large section roadway.A collaborative control technology of＂grouting-anchoring-pouring＂ is proposed for large-section roadway,and the rationality of ＂grouting-ancho-ring-pouring＂ technology is verified through on-site engineering practice.The results provide technical refer-ence for the control of surrounding rock in similar large deformation roadways.
Keywords：roadway supportdeep coal minelarge-section ingatefailure mechanismabutment pressure
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 42-48 )