Method for building high roller compaction water-permeable tailing dam by rock dumping

A technology of tailings dam and rock discharge

Inactive Publication Date: 2010-12-29
鞍钢集团矿业设计研究院有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for constructing a high bulk impermeable tailings dam by using discarded rocks, so as to increase the height of the tailings dam crest, solve the problem of insufficient volume of the existing mine dump, and prolong its service life

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  • Method for building high roller compaction water-permeable tailing dam by rock dumping
  • Method for building high roller compaction water-permeable tailing dam by rock dumping

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Embodiment

[0052] Take the concentrator of an iron mine as an example:

[0053] The height of the permeable tailings dam is 144 meters.

[0054] The parameter cohesion is 5MPa.

[0055] The said parameter internal friction angle is 36°.

[0056] The stated dry bulk density is 2.2g / cm 3 .

[0057] The invention effectively combines the mine dump and the tailings pool of the ore dressing plant, which can improve the utilization rate of the existing land in the mine, further increase the volume of the mine dump, solve the problem of insufficient volume of the dump in the long-term mining of iron mines, and reduce The newly acquired land area of ​​the dump site can also increase the volume of the tailings pond and prolong the service life of the tailings pond. Its economic benefits: Taking the tailings dam of a concentrator of an iron mine as an example, the present value of economic benefits of the project during the entire calculation period is 4,941.56 million yuan, and the annual ave...

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Abstract

The invention relates to a method for building high roller compaction water-permeable tailing dam by rock dumping, which is characterized by comprising the following steps: acquiring layer depth and compaction criterion control parameters of the high roller compaction water-permeable tailing dam by means of onsite test, wherein the layer depth is from 0.3 to 0.6 meters; roller-compacting rocks 13 to 17 times by a vibrating compactor, wherein natural average density of migmatitic granite can reach 2.45g / cm3 and average dry density thereof is 2.41g / cm3, and natural average density of phyllite can reach 2.45g / cm3 and average dry density thereof is 2.39g / cm3; acquiring accurate computation parameters by onsite direct shear and permeation test, wherein dry bulk density is 2.0 to 2.3g / cm3, angle of internal friction is 36 to 40 DEG, and cohesive strength is 0 to 5 MPa; and verifying the onsite direct shear computation parameters by large triaxial test to result in the fact that the cohesive strength and the angle of internal friction are within the scope of the large triaxial test. The method can increase the capacity of tailing reservoir and prolong the service life of tailing preservoir.

Description

technical field [0001] The invention relates to the technical field of tailings dams, in particular to a method for building high-rolled permeable tailings dams by removing rocks. Background technique [0002] At present, the stripping materials of domestic mines and the tailings of the concentrator are discharged separately, and the mine dumps and tailings ponds need to occupy a large area of ​​land. Many tailings ponds in metallurgical mines are at the end of their service life, that is, they are in the critical stage of closing or selecting new locations. The tailings pond is mainly responsible for the discharge of tailings from one or more concentrators, and its service life and production conditions have a major impact on mine production. The volume of existing dumps in some iron mines cannot meet the needs of long-term production. Using the existing dumps to extend outwards will involve a large number of relocation and land acquisition problems. The investment is huge...

Claims

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Application Information

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IPC IPC(8): E02D17/18E02D15/00B09B1/00
Inventor 李荣海迟淑萍李海臣姜科沈占功范跃铁陈进王瑞贾学智
Owner 鞍钢集团矿业设计研究院有限公司
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