Research On Cemented Waste Rock Filling Technology And Numerical Simulation Of The Mechanical Properties Of Filling Body At The Meso Level

The use of waste fill is probably as old as mining since it has always been valuable to a mine operator to dispose of development rock in mined-out stopes to avoid removing it from the mine. The primary purpose of waste fill or any type of fill, howerer is to support mined-out openings so as to prevent caving, surface subsidence, pressure on the work place, or rock bursting. Another reason for using waste fill is simply that the waste material availbe to the mine and is the most economic method of filling mined-out opening that require support.One of the contents of the study is to establish a system of new filling technology.In the new filling system, development rock need not transport to the ground, cuting transportation cost. The size of rock can be freely control and the production of concrete become rational and convenient; stir well, guarantee the stability and strength; without mixing sand, fine crushing process can replace sand, greatly saving cost, reduce the engineering quantity, high efficiency; the pump pumping concrete technology, advanced and efficient; system construction is simple and universal, more than a mine available, but also fully available widely.Another of this research is that the filling process of the pumping of concretematerial grading and mechanics performance in fine structure research andsimulation.Concrete is a composite material. Its mechanical properties have made great achievements in macro level. The research mainly adopts experiment method.Howerer, Test cycle is long, the test requires a lot of manpower and resources. And the selection of materials, accurate operation, test conditions related to the test result, with a certain degree of randomness and uncertainty. At the mesoscopic level, concrete can be regarded as hybrid materials composed of transition zone three-phase materials of coarse aggregate, cement mortar, bone coarse material and cement mortar. This article uses large-scale finite element software ANSYS, the waste rock concrete is divided into three kinds of material models, on the shape, size, mechanical performance parameters are analyzed, and the successful modeling and grid. Use separate finite element model, through the development of inner crack simulation of concrete in compression process, for finite element analysis of meso level mechanics performance of concrete.By adding pressure on the model and achieve the damage degree, speculated that the waste rock concrete uniaxial compressive strength theory. And do the actual block, subjected to uniaxial compression test, and the simulation values were analyzed and compared.