Research And Application Of Numerical Simulation Of The Paste Filling Mining

Paste filling mining is now as one of effective pressure coal three,compared withthe traditional mining method, the paste filling mining safety to increase at the sametime can greatly enhance the recovery rate,protect the ecological environment andother benefits, promotion and application of the filling technology in full compliancewith the national advocate of green mining,and can effectively solve the "three" coalgangue, covering issues such as. This paper will combine the similar simulation test,numerical simulation and other methods,to analyze the problems of overlying stratamovement rule of mine filling and surface subsidence etc.The mining method of the paste filling mining control of rock from the traditional,because the paste filling mining with backfill control the strata movement,so theoverlying strata movement and ground paste filling condition is different from thetraditional method of mining subsidence. Compared with other filling miningtechnique, the biggest advantage is that filling paste filling technology of goaf roofdoes not collapse. Stope in front of subsidence and control roof area, supporting role offilling body roof in mined out area of subsidence was effectively controlled. Therefore,filling mining strata control is the key mobile control direct top and lower roofdeformation. As long as the deformation and failure of the roof and immediate roof hasbeen effectively controlled, so to protect the surface from damage to structures can beachieved.This paper uses the method of physical numerical calculation and the actualengineering, the filling mining stratum deformation process and scope of study. Andthe filling body supporting mechanism is analyzed and studied.As a rule of overlying strata movement revealed the paste filling mining, based onthe different filling rate under the physical and numerical simulation, results show thatthe overlying strata developed bending zone and micro fracture zone without cavingzone, the overlying strata are well controlled, and reduce the pressure ground strength.In Xiaotun mine paste filling mining system and process to do a comprehensiveexposition. The prediction model of surface subsidence in Xiaotun mine backfill,backfill mining subsidence coefficient of prediction analysis, found the subsidencecoefficient is controlled within0.16in the surface, can be used to protect the surfacebuildings requirements Nanwang village. Finally, combined with the specific situation in Xiaotun mine filling working face,the Xiaotun mine working face filling mining ground subsidence after were observedand analyzed, a detailed analysis of the mine Xiaotun, filling mining cost structure, andthe mine Xiaotun filling mining results are introduced.