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Multi-objective optimization method of waste rock filling slurry using low-quality solid waste and anti-segregation

A technology of multi-objective optimization and filling slurry, applied in the field of comprehensive utilization of resources, can solve the problems of increasing material cost and reducing the economic benefits of large-scale filling mining, and achieves the goal of solving the problem of stratified segregation, significant economic benefits and environmental protection benefits. Effect

Active Publication Date: 2020-09-18
UNIV OF SCI & TECH BEIJING +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The segregating agent can solve the problem of slurry segregation, but it will increase the material cost and inevitably reduce the economic benefits of large-scale filling mining

Method used

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  • Multi-objective optimization method of waste rock filling slurry using low-quality solid waste and anti-segregation
  • Multi-objective optimization method of waste rock filling slurry using low-quality solid waste and anti-segregation
  • Multi-objective optimization method of waste rock filling slurry using low-quality solid waste and anti-segregation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A multi-objective optimization method for waste rock filling slurry using fly ash as fine aggregate to resist segregation includes the following steps:

[0059] 1. Analysis of physical and chemical properties of filling materials

[0060] Drying of waste rock and fly ash as well as mineral composition analysis and particle size testing. The analysis results of fly ash mineral composition are shown in Table 1, and the particle size distribution curve is shown in figure 1 , the characteristic values ​​of particle size distribution are shown in Table 2. It can be seen that the average particle size of fly ash fine aggregate is 46.2 μm.

[0061] Table 1: Analysis results of chemical composition of fly ash

[0062]

[0063] Table 2: Characteristic values ​​of particle size distribution of fly ash fine aggregate

[0064]

[0065] The results of chemical composition of mine excavation waste rock are shown in Table 3. For waste rock aggregates of different particle s...

Embodiment 2

[0104] A multi-objective optimization method for waste rock filling slurry using copper slag as fine aggregate to resist segregation includes the following steps:

[0105] 1. Analysis of physical and chemical properties of filling materials

[0106] Drying treatment of waste rock and copper slag, mineral composition analysis and particle size test. Copper selection tailings are solid wastes discharged from the secondary copper selection of copper-nickel slag. The results of mineral composition analysis of copper slag tailings are shown in Table 6, and the particle size distribution curve is shown in Figure 4 , the characteristic values ​​of particle size distribution are shown in Table 7. It can be seen that the average particle size of copper tailings is 57.01 μm.

[0107] Table 6: Analysis results of chemical composition of copper slag tailings

[0108]

[0109] Table 7: Characteristic values ​​of particle size distribution of copper slag fine aggregate

[0110] ...

Embodiment 3

[0150] The multi-objective optimization method of waste rock filling slurry using limestone powder solid waste to resist segregation includes the following steps:

[0151] 1. Analysis of physical and chemical properties of filling materials

[0152] Waste rock and limestone powder are processed and particle size tested. The particle size distribution curve of limestone powder is shown in Figure 5 , see Table 11 for particle size distribution eigenvalues. It can be seen that the average particle size of limestone powder is 36.037 μm.

[0153] Table 11: Characteristic values ​​of particle size distribution of limestone powder fine aggregate

[0154]

[0155] The chemical composition of mine excavation waste rock is shown in Table 12. See the original state of waste rock coarse aggregate with different particle sizes figure 2 . The particle size distribution curve of -12mm waste rock coarse aggregate is shown in image 3 . The particle size distribution characteristi...

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Abstract

The invention provides an anti-segregation waste rock filling slurry multi-objective optimization method utilizing low-quality solid waste, and belongs to the technical field of comprehensive utilization of resources. The method comprises the following steps: firstly, carrying out physicochemical analysis and particle size test on waste rocks and low-quality solid wastes; then, performing waste rock cemented filling body strength and fluidity and stability tests of filling slurry ; establishing a mathematical model of the relationship between the waste rock resource utilization rate and the cementing material addition amount, the slurry concentration, the filling body strength and the fluidity and stability parameters of the filling slurry according to the test result; establishing a wasterock filling slurry multi-objective optimization model; and finally, solving the waste rock filling slurry multi-objective optimization model to obtain the optimal proportion of the waste rock filling slurry with the highest waste rock resource utilization rate and the lowest filling cementing material utilization cost. The method has remarkable economic benefits and environmental protection benefits.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of resources, in particular to a multi-objective optimization method for waste rock filling slurry utilizing low-quality solid waste to resist segregation. Background technique [0002] With the rapid development of my country's national economy and the continuous development of mineral resources, high-grade and high-tech resources are increasingly depleted, and more mining resources are faced with unfavorable stratum conditions such as deep ore burial, high in-situ stress in mining areas, and large groundwater. For safe and environmentally friendly mining, the filling and filling mining method is the preferred choice. Compared with other mining methods, the backfill mining method has complex mining process, high cost of backfill mining, and poor mining economic benefits, which are the biggest difficulties and problems faced by the application of backfill mining. Reducing the co...

Claims

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Application Information

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IPC IPC(8): G06F30/20E21F15/00E21C41/22C04B28/04C04B26/00C04B18/12
CPCC04B18/12C04B26/00C04B28/04C04B2201/50E21C41/22E21F15/005C04B18/08C04B18/144C04B14/28Y02W30/91
Inventor 温震江杨晓炳吴凡黄笃学胡亚军郭斌闫满志涂光富陈彦亭高谦
Owner UNIV OF SCI & TECH BEIJING