Design and Application of Support Scheme for Fractured Rock Roadway under Water Immersion Conditions
In view of the roof water pouring,surrounding rock fragmentation and other support problems faced by 1010 transport roadway in the process of tunneling,the engineering overview of the roadway and the conditions of the roof and floor are analyzed first,focusing on the analysis of the difficulties of roadway support and the characteristics of surrounding rock fragmentation.Then,based on the specific mining experience,the combined support scheme of roadway bolt,mesh and cable is designed,and then the field practice and effect analysis are carried out.The observation results of mining pressure show that the convergence rate of the tunnel section is very small,with a maximum displacement of no more than 132 mm between the two sides and a maximum roof subsidence of no more than 192 mm.The control effect of the tunnel surrounding rock is good,ensuring the safety production of the working face.
roof wateringfragmented surrounding rockanchor net cable combined supportmine pressure observation
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