A method of backfilling mining pillars by using tailings mold bag walls in mines

A technology for underground mines and mold pocket walls, which is used in filling materials, mining equipment, and earth-moving drilling and mining, etc., can solve problems such as low efficiency and unreasonable methods, and achieve the effects of convenient material selection, small limitations and high friction.

Active Publication Date: 2020-05-19
JIANGSU CHANGTAI CONSTR PROJECT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method adopted by this patent still has the problems of unreasonable and low efficiency, and it cannot effectively recover the left pillars under the condition of saving land.

Method used

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  • A method of backfilling mining pillars by using tailings mold bag walls in mines
  • A method of backfilling mining pillars by using tailings mold bag walls in mines
  • A method of backfilling mining pillars by using tailings mold bag walls in mines

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Effect test

Embodiment 1

[0047] Such as figure 1 As shown, a kind of method that uses tailings mold bag wall filling back mining pillar under the mine that the present invention provides, comprises the following steps:

[0048] Step 1: According to the distance between two ore pillars, the relationship between the size of the ore body settlement and the load capacity of the mold pocket wall, calculate the compression amount S of the mold pocket wall. The specific calculation steps are as follows:

[0049] 1) Calculate the relative density Dγ:

[0050]

[0051] In formula (1), Dγ: relative density, e max- : maximum void ratio, e min : minimum void ratio, e 0 : natural void ratio or relative void ratio of tailings;

[0052] 2) Calculate the amount of compression Δs:

[0053]

[0054] In formula (2), Δs: the compression amount of tailings in any horizontal layer Δz, Δz—layer thickness,

[0055] e 1 ---The void ratio of the soil in the natural state, e 2 ---The void ratio of the compacted so...

Embodiment 2

[0066] This embodiment is further improved on the basis of Embodiment 1, the difference is that the method provided by the present invention is to use the tailings mold bag wall to fill back the mining pillar under the mine, such as Figure 1-5 As shown, the ore pillars in the stope are arranged in parallel along the ore body tendency. During the mining stage, they are mainly used for the mining of the ore pillars under the mine. After the ore mined in the mine is transported out, several regularly arranged ore Generally, the horizontal distance between the two ore pillars is 7 meters, the average oblique length of the mine house is 50m, and the diameter of the ore pillar is 3 meters, 8-20m 3 A blast hole is set on the ore pillar for blasting, a rake bucket is arranged near the blast hole, a cutting lane 5 next to the mine bottom roadway 3, the rake bucket is set opposite to the bucket opening 6 on the mine bottom roadway 3, and the cutting roadway 5 is connected to the electri...

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Abstract

The invention relates to the technical field of mining, in particular to a method for using a tailings mold bag wall to fill an ore pillar recovery under a pit, which uses the tailings mold bag wall to fill the ore pillar recovery under the pit, wherein the tailings mold bag wall ore pillar recovery is the method of improving benefits that successfully stopes a reserved high-grade ore pillar by using mineral waste tailings filling mold bags and through forming a top-down processing tailings mold bag wall supporting ore bodies. In implementation, drawing materials is easy and the limitations are limited. The purpose of not only using the tailings and reducing the tailings storage but also saving soil, stopping remaining the ore pillar and increasing profits can be achieved.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a method for filling back mining pillars in underground mines using tailings mold bag walls. Background technique [0002] At present, the consumption of mineral resources is increasing rapidly, the main proven minerals are in serious shortage, the utilization rate of mineral resources is low, and the environmental pollution caused by mineral development is prominent; not only the lack of technology and relatively backward technology level, but also the depletion of mineral resources On the one hand, the remaining high-grade ore pillars cannot be exploited, causing waste, and the tailings pond wastes a lot of land resources. It is urgent to find a method that can not only utilize tailings, reduce tailings storage, but also save land and recover the left pillars. [0003] Patent CN 103967493 A discloses a kind of gently inclined thin ore body ore pillar mining method, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20E21F15/00
CPCE21F15/00G06F30/20
Inventor 季卫星向德华罗剑峰徐启章向旸刘涛黄飞唐文华
Owner JIANGSU CHANGTAI CONSTR PROJECT
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