| This paper shows the mechanism of anchor cable support,mechanism by analyzing formation process and structural model of overlying strata structure on working face,determination of narrow coal pillar width in roadway driving along goaf,stress distribution during excavation and recovery,the characteristics of denaturation and the evolution of plastic zone with methodslike theoretical analysis,Numerical Simulation of FLAC,site industrial test.Finally get the surrounding rock control technology of roadway driving along goaf.(1)Based on the analysis of the overlying strata structure on the island face,this paper presents the stress relief area on both sides of the island face,horizontal displacement field on both sides of coal pillar,deformation of roadway surrounding rock after using numerical simulation method,and then confirms the reasonable pillar width.(2)This paper give analysis on gulling roadway driving along the road,vertical stress distribution of roadway surrounding rock in working stage,the evolution of the plastic zone and the deformation characteristics of the surrounding rock and the main influencing factors and the influence rule.Height increase causes the extended deformation of main roof and two sides.In the recovery stage,with the increase of height,the peak of the front face of the working face increases greatly having more impact on solid coal deformation?With the increase of coal pillar strength,the plastic zone has a significant decrease,and the deformation of surrounding rock is also significantly reduced.(3)The support parameters of 15106 working face return airway are determined and the stability of surrounding rock is realized in this paper.It is proved through mechanism of bolt and cable support,and also the idea of high-strength anchor support,increase the pre-tightening force,enhance the ability to improve the support table support which are based on improvement of the integral stability of rock-rock mass with 15106 working roof in anchor. |
PDF Full Text Request