Characteristics of surrounding rock failure and support design for deep-buried coal roof roadways
ZHANG Jinbiao
ZOU Guanghua
XIN Chubing
KONG Dechuang
FAN Qingzheng
ZHOU Kun
Abstract：To solve the common problem of roadway support in deep mining,break through the bottleneck of deep mining,and reduce the risk of safety accidents,a collaborative support technology suitable for deep coal top roadways has been developed.Taking the Tangshan Mine 0293 working face as the background,based on the conditions of the working face and using the Mohr-Coulomb criterion and on-site monitoring,the range of the plastic zone of the surrounding rock of the roadway is determined.Comparing the simulation results of un-supported and bolt-supported roadways,the plastic zone range of the roadway under bolt support is significantly smaller.The research results show that the damage range of the roof and both sides analyzed using the Mohr-Coulomb criterion is 2.4m and 1.2m respectively,while the on-site measured damage range of the roof and both sides is 2.5 m and 1.6 m respectively.Based on the damage range,a three-level coordinated support scheme is designed,including bolts,short anchor cables,and long anchor cables.The specific support parame-ters are:bolt length of 2400 mm,with both bolt and anchor cable diameters of 22 mm.The length of the top an-chor cable is selected as 10000 mm,and the length of the side anchor cable is 4500 mm.The spacing between bolts and the row spacing is set at 700mm,and the spacing between anchor cables is 1400mm;on-site monito-ring of displacement and settlement conditions proves the feasibility of the bolt support effect.
Keywords：large buried deep roadwayMoore Cullen's criterionchanges in plastic zonessupporting parame-ters
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：9( 26-34 )