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A method for retaining ore pillars in gently inclined medium-thick ore bodies with room-and-pillar method

A technology for mine houses and ore bodies, which is applied to the components of pumping devices for elastic fluids, ground mining, mining equipment, etc., and can solve the problem of large movement deformation of overlying strata, surface deformation and settlement, and large exposed area of ​​goaf. and other problems, to achieve the effect of reducing rock burst and rock caving, ensuring stability, and ensuring stability and safety

Active Publication Date: 2021-08-06
河北大白阳金矿有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, the room-and-pillar method mining gently inclined medium-thick ore body has a large exposed area of ​​the goaf after mining, and the improper deformation scheme and stope parameters of the room-and-pillar method are likely to cause large movement and deformation of the overlying rock strata, which in turn leads to large-scale deformation of the surface. Deformation and settlement

Method used

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  • A method for retaining ore pillars in gently inclined medium-thick ore bodies with room-and-pillar method
  • A method for retaining ore pillars in gently inclined medium-thick ore bodies with room-and-pillar method
  • A method for retaining ore pillars in gently inclined medium-thick ore bodies with room-and-pillar method

Examples

Experimental program
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Effect test

Embodiment 1

[0097] see Figure 5-8 As shown, a grouting device includes: a slow material box 50, including two main feed pipes 61, and a secondary feed pipe 53, the material and diameter of the main feed pipe 61 and the secondary feed pipe 53 are the same The slow material box 50 also includes a columnar slow material box 50, the slow material box 50 is hollow inside, and the feed main pipe 61 runs through the hollow slow material box 50 and is formed by the pipe body of the feed main pipe 61 outside the slow material box 50. The second filler is discharged, and the surface of the feed main pipe 61 in the slow material box 50 is equipped with a fastening sleeve body 62. The fastening sleeve body 62 is composed of at least two annular and elastic fastening ring bodies 621 and used for connecting phases. It is composed of a fastening strip 622 adjacent to the fastening ring body 621 and capable of stretching and deforming. The auxiliary feed pipe 53 runs through the slow material box 50 an...

Embodiment 2

[0102] see Figure 1-3 , Shown in 10, a kind of method for retaining of the ore pillar that is used for gently inclined medium-thick ore body room-and-pillar method back mining pillar, the steps are as follows:

[0103] S10, panel area selection, select ore block vertical ore body direction layout (ore body thickness ≥ 10m), the distance between routes is 10m, divide the ore block into mine room and ore pillar, mine room width 10-15m, ore pillar width 4 -6m, in the mine room, it is divided into 5 sections along the height of the mine room, the section height is 10m, and a 7m high top pillar is reserved at the same time. Each layer is connected with the layered roadway 15 through the layered connecting road 13, wherein the mining standard project mainly includes the mining area ramp, the segmented roadway, the segmented connecting road, and the layered connecting road (mine room), sliding mine shaft, filling small shaft (mine house), filling return air shaft (mine pillar), alo...

Embodiment 3

[0115] The difference from Example 2 is that: the filler used for filling also includes 0.04 parts of allantoin; the compressive strength of the filler at 28d age is ≥37.4MPa, the failure load at 28d age is ≥828.3 / KN, and the slag is poured after the waste ore is pulverized. The cross section is rectangular slag.

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Abstract

The invention discloses a method for retaining a mining column by a room-pillar method for a gently inclined medium-thick ore body, which belongs to the field of mining technology. mine pillar; mine house cutting, drilling and blasting shallow holes on the surface of the divided ore blocks to carry out shallow hole blasting drop ore operation; mining house mining, using segmented open field method for mining; cement filling, using the method as claimed in claim 1 The grouting device fills the ore house with the filler in stages. The invention effectively controls the ground pressure by designing the ore pillar structure and performing segmented filling after the mine house is mined out, and using 5G technology to monitor and control the grouting pressure during the filling process and monitor the ground pressure in the mining area. Prevent and reduce differential settlement and roof collapse accidents in the mining area.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a method for retaining ore pillars used in the room-and-pillar method of gently inclined medium-thick ore bodies. Background technique [0002] Gently inclined medium-thick ore bodies refer to ore bodies with a dip angle of 5°-30° and a thickness of 4-15m. This type of ore body occupies a considerable proportion in my country. Among the proven 10.5 billion tons of phosphate rock resources, this type of ore accounts for 86%, iron ore reserves account for 18%, non-ferrous metals account for 5%-9%, mainly copper, followed by lead, zinc, molybdenum , antimony, etc. In addition, manganese ore, clay ore, pyrite, and alum ore resources also have a considerable proportion. According to the statistics of domestic gently inclined medium-thick orebody mines, the room-and-pillar mining method accounts for 50%, and the chassis funnel mining method accounts for 35%. This type of o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/22E21F15/00E21F17/18F04B51/00F04B49/08F04B53/00F04B15/02C04B28/04
CPCC04B28/04C04B2201/50E21C41/22E21F15/00E21F15/005E21F17/18F04B15/02F04B49/08F04B51/00F04B53/00C04B14/06C04B18/141C04B18/146C04B2103/302C04B2103/50C04B2103/12
Inventor 张非孙庆和张东
Owner 河北大白阳金矿有限公司
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