Paste combined filling method utilizing solid wastes of mine

A solid waste and paste technology, which is applied in the direction of filling, mining equipment, earth cube drilling and mining, etc., can solve the problems of low crushing efficiency, low concentration of filling materials, large excavation waste rocks, etc., and achieves reliable and reliable results. Environmental and safety issues, the effect of convenient on-site operation

Inactive Publication Date: 2011-08-17
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, the particle size of the whole tailings is fine, and dehydration is difficult, resulting in low concentration of filling materials, poor coagulation performance and low strength of the whole tailings; secondly, the excavation waste rocks are large in size, difficult to realize p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, build a filling partition wall at the entrance of the underground goaf. If the filling partition wall is a concrete partition wall, the thickness is 30cm, the concrete grade is C15-C25, and the curing period is 24h-48h; The lumpiness of the content lower than the cut-off grade is 0~400mm waste rock, the loose angle of repose is 40°, and the filling volume ratio of waste rock is 10%; then, the percentage by weight is 6.25% of slag cement and 78.75% of aggregate (accounting for The mass percentage is 60%, the particle size is 0~25mm, it is weakly alkaline, and the metal mine beneficiation waste with a -20um content of 15~85% is dehydrated and concentrated, and the weight concentration is 70% mixed with water quenching slag 40%) and water 15% is prepared into a paste cementing material with a weight concentration of 75% in a mixer; the paste cementing material is transported to the goaf by gravity along the filling pipeline, and the pipeline specification is φ150mm, ...

Embodiment 2

[0019] First, build a filling partition wall at the entrance of the goaf underground. If the filling partition wall is a flexible partition wall; the target metal content in the goaf is filled with waste rocks of 0-400mm in size and the angle of repose is loose. 45°, and the volume ratio of waste rock filling is 45%; then, 30% by weight of slag cement and 50% of aggregate (60% by weight of particles with a particle size of 0-25mm are weakly alkaline, - 20um content of 15~85% metal mine beneficiation waste is dehydrated and concentrated, the weight concentration is 70% mixed with water quenching slag 40%) and water 20% is prepared in a mixer to prepare a paste cementing material with a weight concentration of 80%; The paste cementing material is transported to the goaf by gravity along the filling pipeline, the pipe specification is φ200mm, the paste cementing material penetrates into the pores of the waste rock, and forms a joint filling body with the waste rock after solidific...

Embodiment 3

[0021] First of all, build a filling partition wall at the entrance of the underground goaf. If the filling partition wall is a concrete partition wall, the thickness is 70cm, the concrete grade is C15-C25, and the curing period is 24h-48h; the target metal is filled in the goaf The lumpiness of the content lower than the cut-off grade is 0~400mm waste rock, the loose angle of repose is 40°, and the filling volume ratio of waste rock is 10%; then, the percentage by weight is 6.25% of slag cement and 78.75% of aggregate (accounting for The mass percentage is 60%, the particle size is 0~25mm, it is weakly alkaline, and the metal mine beneficiation waste with a -20um content of 15~85% is dehydrated and concentrated, and the weight concentration is 70% mixed with water quenching slag 40%) and water 15% is prepared into a paste cementing material with a weight concentration of 75% in a mixer; the paste cementing material is transported to the goaf by gravity along the filling pipeli...

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Abstract

The invention relates to a paste combined filling method utilizing solid wastes of a mine. The method comprises the following steps of: constructing a filling retaining wall at the inlet of an underground worked-out section, and filling waste stones in which target metal is not contained or the content of the target metal is less than a boundary level, wherein the lumpiness is 0 to 400 millimeters, the loose static angle is 40 to 45 degrees, and the filling volume rate of the waste stones is 10 to 45 percent; then mixing 6.25 to 21.25 weight percent of gelatinizing agent, 53.75 to 78.75 weight percent of filling aggregates and 15 to 25 weight percent of water into a stirrer so as to prepare a paste cement material with the weight concentration of 75 to 85 percent; and conveying the paste cement material to the worked-out section through pumping of a filling pipeline or self-flowing under the action of gravity along the filling pipe, wherein the paste cement material is penetrated into the gaps of the waste stones; and the solidified paste cement material and the waste stones form a combined filler. By the method, the utilization rate of beneficiation full tail sand, smelting water granulated slag and underground waste stones is up to 100 percent, so the tailings cannot enter the base, the waste stones cannot emerge from the groove and the smelting water granulated slag cannot be piled up; and the environment and safety problems due to stacking of the wastes on the earth surface are solved from the sources.

Description

technical field [0001] The invention belongs to the technical field of mine filling, and relates to a method for preparing high-concentration filling material from mine solid waste and performing combined filling with underground waste rock, which is suitable for comprehensive utilization of various solid wastes produced on the surface and underground. Background technique [0002] The development and utilization of metal minerals generally need to go through three major processes: mining, sorting, and smelting. Each process produces a large amount of solid waste, such as mining waste rock, beneficiation tailings, and smelting waste residue. These wastes not only occupy a large amount of land, but also pollute the environment. On the other hand, for underground mines, in order to improve the underground safety environment and increase the ore recovery rate, it is necessary to fill the goaf. Using a variety of wastes produced in mines as filling materials can greatly elimina...

Claims

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Application Information

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IPC IPC(8): E21F15/08
Inventor 王洪江吴爱祥韩斌焦华喆刘晓辉陈进严庆文何世林
Owner UNIV OF SCI & TECH BEIJING
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