Study On Wall Rock Transmogrification Mechanism Of Laneway Along The Gob In The Influence Of Caving About The Fully Mechanized In Deep Mine

The paper researched the stress fields and the deformation and breakage characters of wall rock of laneway along the gob about the fully mechanized in deep mine, which establish the theory basis of the wall rock transmogrification of the laneway along the gob. The paper combines investigative mode of theory analysis and numerical simulation analysis, based on elastic and plastic theory, explaining the relation of stress fields and stress- transmogrification. Then citing key stratum theory, the paper analyzing the moving rule of the stratum above the laneway along the gob, gaining some disciplinary cognition. The paper simulates by FLAC3D, firstly according to analyze the wall rock transmogrification with the influence of different position and intension of interface structure, educing the conclusion- when interface structure stands in up of the laneway and biggish intension, the wall rock transmogrification is most. Secondly, simulation elicits wall rock transmogrification under the different coal pillar and different stress. Again, according to analyze wall rock change along with working face advancing under caving, the paper gains three different phases of wall rock transmogrification. Lastly, the paper simulates bolt timbering of the laneway along the gob.Some conclusions are made clear through the paper. Using the theory analysis and numerical simulation method can open out the stress fields, deformation and destroying characters, which is propitious to select and optimize design projects, reduce the testing time and economize the project outlays, and then improve the economy benefit and society benefit. And take into account of laneway collocation and timbering, the paper bring forward rational advice, which have some active significance to control deep laneway stability.