Research On Secondary Support Technology For Deep High-Stress Soft Rock Roadway In Xingcun Coal Mine

With the increase of mining depth, the support problem of deep high stress soft rock roadway has become one of the major problems restricting coal mining. It is important to explore the deformation and failure characteristics of deep high stress soft rock roadway and the surrounding rock control mechanism The meaning of.Based on the background of Xingcun Coal Mine, this paper studies the support of deep high stress roadway encountered in Xingcun coal mine. The physical and mechanical properties of deep coal and rock mass in Xingcun coal mine are determined by laboratory rock mechanics experiment. And the geophysical properties of the surrounding rock of the deep high stress soft rock roadway are studied, and the characteristics of the deformation and failure of the surrounding rock of the high stress soft rock roadway are summarized. In the deep high Based on the theory of rock mechanics, the mechanics meaning of the optimal support time of high stress soft rock roadway is expounded by the theory of rock mechanics, and the pressure support and the second And the distribution of the surrounding rock, the displacement field and the distribution area of the plastic zone are simulated by numerical calculation. The results show that the rockburst of the surrounding rock is simulated by the method of FLAC3D. Comparative analysis of the presser support,stiffness and support after pressure let stiffness support control mechanism of surrounding rock, and once through simulation Different timings of secondary support is applied to the protective effect of the control pressure after rock deformation in support, determining the best theory secondary support.In -1196 auxiliary inlet roadway Star Coal Mine Tunnel Boring head conducted an excavation so that pressure support and stiffness of large industrial test secondary support and on-site monitoring results show that the use of a support network anchor let spray pressure support mode, secondary support large stiffness support retaining manner using anchor rope can effectively control the deformation of surrounding rock to ensure long-term stability of surrounding rock, easy on the project to achieve reasonable supporting effect on the economy, It is of practical significance to guide the deep high stress soft rock roadway support project.