Research On The Stability Of Thick Seam And Large Section Roadway Surrounding Rock And Integrative Digging And Anchoring

As the increase of fully-mechanized caving mining strength,the poor supporting effect and low automation degree of digging and anchor integration become difficult problem of quick excavation in thick coal seam large section roadway. Theoretical analysis, numerical simulation, mechanics experiment and field test methods were applied in this paper to systematicly study the theory and technique of rock stability of thick coal seam large section roadway and digging and anchor integration automation. The main conclusions are as follows:(1) a mechanical model of the roof of thick coal seam roadway was set up to determine width of thick coal seam large section roadway. (2) The influence laws of roadway width, height, and buried depth on rock stability of thick coal seam large section roadway were researched and rock deformation and damage features of thick coal seam large section roadway were analyzed. (3) The rock control technology of digging and anchor integration of rapid timely support, high resistance temporary support and high pre-tightening bolting support in thick coal seam large section roadway was developed. (4) 3D coordinate model and swing structure mathematical model were established to achieve the caving and bolting machinery automatic positioning and automatic cutting and realize remote control and automatic monitoring to caving and bolting machinery by PLC.Research results were successfully applied in Wangzhuang Mine of Shanxi Luan mining group, improving the tunneling speed, reducing cost and achieving remarkable economic and social benefits, which has important strategic significance for improving the automation level of our country's mine tunneling.