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Water-solid mixed slurry loading and pre-pressing dehydration consolidation method

A technology of mixing slurry, loading and preloading, applied in drainage, earth square drilling, mining equipment, etc., can solve the problems of non-dehydration of water-solid mixed slurry, long consolidation period, high consolidation cost, etc., to improve the compactness and strength, reduce consolidation cost, and shorten the effect of consolidation cycle

Active Publication Date: 2019-05-31
CHINA MINMETALS CHANGSHA MINING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method for preloading dehydration and consolidation of water-solid mixed slurry to solve the problems of non-dehydration of water-solid mixed slurry, slow dehydration speed, long consolidation period, difficult consolidation and Technical issues with high consolidation costs

Method used

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  • Water-solid mixed slurry loading and pre-pressing dehydration consolidation method
  • Water-solid mixed slurry loading and pre-pressing dehydration consolidation method
  • Water-solid mixed slurry loading and pre-pressing dehydration consolidation method

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Such as figure 1 , image 3 and Figure 5 As shown, it is a preloaded dehydration consolidation scheme for the filling slurry. It is suitable for filling slurry consolidation in roadway type gobs such as road filling method, layered filling mining method and wall filling mining method.

[0050] (1) Build drainage facilities. Geotechnical blind ditches (drainage pipes 3 ) are arranged along the length direction of the area to be filled 2 , and the geotechnical blind ditches (drainage pipes 3 ) are covered with geotextiles to prevent the loss of fine particles. The outer diameter of the geotechnical blind ditch (drainage pipe 3) is 30mm-80mm. Preferably, the outer diameter of the geotechnical blind ditch (drainage pipe 3) is 50mm. The spacing of geotechnical blind ditch is 1m~5m. Preferably, the distance between the geotechnical blind ditch is 2m.

[0051] (2) Install the capsule preloading system (preloading component 4). In order to prevent the airbag body from ...

Embodiment 2

[0058] figure 2 and Figure 4 Preload dehydration and consolidation scheme for dewatering filling slurry on retaining surface of reserved space 8. It is suitable for the consolidation of filling slurry in roadway type gobs such as road filling method, layered filling mining method and wall filling mining method.

[0059] Carry out the isolation of the permeable enclosure 7 of the area to be filled 2, build drainage facilities, construct the permeable enclosure 7 in the empty area, divide the empty area into the area to be filled 2 and the reserved space 8, and make the area to be filled 2 form a permeable seal body. Construction process of permeable enclosure 7: Install hydraulic props along the full length of 2 weeks of the area to be filled, and the spacing between props is 0.5m / root to 3m / root. Preferably, the distance between pillars is 1.5m / root. Hang the metal mesh at the full height and full length of the pillar near the area to be filled 2, the size of the metal m...

Embodiment 3

[0062] Such as figure 1 , image 3 and Figure 5 As shown, it is a preloaded dehydration consolidation scheme for the filling slurry. It is mainly suitable for filling slurry consolidation in roadway type gobs such as access filling method, layered filling mining method and wall filling mining method.

[0063] Firstly, the drain pipe 3 is built on the bottom of the area to be filled 2, and then the air bag preloading device is arranged on the side of the area to be filled 2, and then a custom-made filling mold bag 6 that is slightly larger in volume than the empty area to be filled is laid in the area to be filled 2 . The filling slurry is filled in the filling mold bag 6 , and when the filling slurry is full of the area 2 to be filled, the filling mold bag 6 and the area 2 to be filled are closely attached to each other. The filling mold bag 6 is processed by geotextile, requiring water-permeable and impermeable aggregate. The remaining steps are similar to Embodiment 1. ...

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Abstract

The invention discloses a loading, prepressing, dewatering and solidification method for mixed slurry of water and solids. The method includes the following steps of constructing a drainage facility in an area to be filled; building fences on the area to be filled to form a sealed area; distributing prepressing assemblies used for loading and prepressing toward the mixed slurry of the water and solids in the sealed area within the sealed area; adopting the mixed slurry of the water and solids for filling the sealed area; starting the prepressing assemblies to exert pressure load toward the mixed slurry of the water and solids, and monitoring solidification parameters of the mixed slurry of the water and solids in real time; gradually enhancing the loading pressure of the prepressing assemblies, and stopping loading till the solidification parameters reach the design requirements. The dewatering and solidification processes of the mixed slurry of the water and solids can be acceleratedthrough loading and prepressing, and the solidification period is shortened. Through the prepressing function, the compactness and intensity of solidified bodies can be improved; the solidification ofmixed slurry of the water and solids can be achieved without cementation agents or with low consumption of the cementation agents, and therefore the solidification cost is reduced. The method is applicable to dewatering and solidification of mixed slurry of water and solids in disposal of mine residual waste, earthwork engineering and the like.

Description

technical field [0001] The invention relates to the technical fields of mining engineering and geotechnical engineering, in particular to a method for loading, preloading, dehydrating and consolidating water-solid mixed slurry. Background technique [0002] The beneficiation tailings of domestic non-ferrous metal mines and gold mines have a particle size of less than 1mm, and some mine tailings contain 30-50% of mud less than 5μm. The full tailings filling uses full-size tailings to fill underground. When the tailings contain a large amount of mud, the cement bonding performance is poor and the cementation is difficult. Some mines have to use graded tailings for filling, but the fine-grained overflow High-grade tailings are discharged in the tailings pond, and the dam cannot be built. The dam-filling process of the tailings pond will change and need to be rebuilt. Some mines have taken risks, burying a major safety hazard for the mines. [0003] When hydraulic filling is us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00E21F16/00
CPCE21F15/00E21F16/00
Inventor 赖伟
Owner CHINA MINMETALS CHANGSHA MINING RES INST
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