Study On Numerical Simulation of the Arrangement about Mining Roadway with Short Distance

Based on numerical simulation test and test results, the stability of bare roadway with different staggered distance was studied. Conclusions can be drew as follows: Of these ulter-closed mining roadway arrangement modes, global stability of the inboard type roadway is better based on the aspects of degree of damage; Roof subsidence in the inboard-type roadway is smaller, offset at two sides of roadway is larger, its offset direction approaches toward the centre of roadway, and offset increases with staggered distance decreases, the supporting of two sides is the central difficulty for in-board type roadway; The degree of damage in overlapping-type roadway is larger, and roof subsidence of overlapping-type is similar with the inboard-type roadway, while the deformation is large at left side, there are few changes at right side. The destructive deformation is maximum when the staggered distance of outward-type roadway is 2m, and degree of damage is decreases with the increase of staggered distance in outward-type roadway. Overall, roof subsidence in the outward-type roadway is larger, and two sides of it are basically stable. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of China Academy of Safety Science and Technology, China University of Mining and Technology(Beijing), McGill University and University of Wollongong.