Application of Coupling Pressure Equalizing Support in Soft Rock Support of Deep Mining Mine
The problems of surrounding rock control in deep soft rock roadway,such as large deformation of surrounding rock,large force of supporting body and difficulty of surrounding rock control,are practical problems to be solved during deep mining.Based on the engineering background of surrounding rock support of 11306 transport roadway,aiming at the problems of large buried depth(average buried depth 680 m)and soft surrounding rock(roof and floor are sandy mudstone and mudstone)of the roadway,based on the analysis of the failure causes of the original anchor cable support system,it was proposed to apply the coupling pressure equaling support to the surrounding rock control of the roadway.The serpentine bolt,constant-resistance bird nest anchor cable,"JW"steel belt and the flexible fiber net used in the coupled pressure equalizing support have the advantages of strong deformation resistance and large support strength.At the same time,the serpentine bolt and the constant-resistance bird nest anchor cable can be coupled with the roof to deform,and the roof can be sustainably given a large support force.After engineering application,the maximum deformation of roof and floor,and two sides of 11306 transportation roadway was 191 mm and 105 mm respectively,and the deformation control effect of surrounding rock was remarkable.
deep miningsoft rock roadwaysurrounding rock controlcoupling pressure equalizing support
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