DOI: 10.11799/ce202506009
Surrounding rock control technology for track roadway through roof cutting with deep and shallow blasting
ZHANG Jianjing
HUANG Yucheng
WU Xuefeng
WANG Chengshuai
REN Shijie
GUO Liang
LIU Zhipeng
Abstract：In response to the large area suspended roof caused by the difficult collapse of the hard roof mining face in Jincheng Coal Mine,which leads to high stress and large deformation of the surrounding coal and roadway surrounding rock,we took the 10-205 thick hard roof working face as the engineering background,to study the mining roadway surrounding rock control technology with blasting roof cutting and pressure relief through theoretical analysis and numerical simulation.Reasonable key parameters of the roof cutting were analyzed and applied in on-site engineering.The research results indicate that,the blasting roof cutting changes the fracture position of the roof,the collapsed rock blocks fill goaf and support the overlying rock structure,thus eliminate the strong disturbance and harm to the district track roadway caused by the rotation and sinking of the roof.For the 10-205 working face,the reasonable cutting method is deep-shallow holes blasting,with a shallow hole cutting height of 14.7 m and a deep hole cutting height of 22.6 m;Compared with shallow hole blasting for roof cutting,the deformation of the district track roadway was better controlled using the deep-shallow holes blasting,bringing down the roof-to-floor convergence and side-to-side convergence by 63%and 56%,respectively.Favorable roadway protection effect was achieved with the proposed roof cutting and pressure relief method.
Keywords：roof cutting for roadway protectionhard roofdeep and shallow blastingroof cutting parametersroadway protection through pressure-reliefroadway support
Publication Date：2025-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 67-72 )