Experimental Study And Strength Optimization Design Of Cementing Filling And Filling Of A Copper Mine Tailings

Under the support of the existing technical level,the exploitation of underground ore body is mainly for the rational exploitation of the ore.As one of the most important methods for the treatment of mined out area,the method of filling mining has an important influence on the safety and production practice.Based on the requirement of reducing filling cost and relying on the theory to design the strength of filling body,this paper takes the test stope in the middle part of-340 m in a copper mine as the research object,and uses two steps to mine the ore body.Combined with the domestic and foreign data,theoretical analysis and numerical simulation,this paper carries out the experimental study and the strength optimization design.The main research contents and results are as follows:1.For the mine this paper carried out the relevant tests for different ratio of tailings material,including compressive strength and tensile strength test of different ratio of 3d,7d,28 d material,so as to obtain the specific mechanical parameters of the mine material,through the range analysis and response surface,to determine the importance of factors affecting the strength of materials.It provides data for the determination of the self supporting strength of the filling body in the third chapter.2.For the domestic and foreign filling body strength design model analysis and calculation,and analysis of the advantages and disadvantages of each model and the applicable conditions,combined with the relevant parameters to determine the reasonable strength requirements of the pillars.Based on the energy analysis theory of the filling body and the establishment of the "balance arch" mechanical model,it provides a theoretical support for the stability of the stope.In this paper,the theory of cusp catastrophe theory is used to analyze the rationality of the stope span,and the rationality of the 35 m of the stope span is determined by combining the mechanical model of the exposed height.3.The application of FLAC₃D software simulation design for-340 m middle stope stope,and puts forward 5 kinds of cement sand ratio optimization scheme,analyses the stress variation and distribution of plastic zone,displacement changes and other aspects of stope stability and backfill deformation and stress distribution,preliminary determined the reasonable plan.Combined with AHP and FCE to build a comprehensive evaluation of the hierarchical model,and finally through the multifactor perspective to determine the optimalsolution for the design of the strength of the mine filling body provides an important basis and direction.