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Backfill grouting restoring draw shaft process of metal mine

A technology of chute and grouting, which is applied in the direction of filling, shaft lining, mining equipment, etc. It can solve the problems of chute wall rock damage, chute penetration, and collapse, etc., and achieves simple configuration method, wide application range, and construction personnel little effect

Inactive Publication Date: 2017-05-31
BEIJING CHINA COAL MINE ENG CO LTD
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Problems solved by technology

[0002] The ore drawing in the chute is the main way of ore transportation in metal mines. The impact, extrusion and friction of the ore during the ore drawing process have a great destructive effect on the shaft wall. Generally, the surrounding rock of the chute shaft wall in the metal mine is not protected by the concrete shaft wall. The lumpiness control of the unloaded ore is not strict, resulting in damage to the rock mass of the shaft wall, and even large-scale slabs or collapses, and the occurrence of breakthroughs in adjacent shafts, which has a great impact on mine production

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  • Backfill grouting restoring draw shaft process of metal mine

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Embodiment Construction

[0026] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0027] In this embodiment, the process of backfilling the metal mine with bulk grouting and repairing the chute includes the following steps:

[0028] (1) Investigate the damaged area of ​​the surrounding rock of the chute, and fill the entire shaft of the damaged chute with bulk materials;

[0029] The bulk material is ballast or crushed stone. The detailed specifications of the bulk material are: the particle size is 28-63mm, the crushing rate of the bulk aggregate is 9%-14%, and the permeability coefficient of the bulk ...

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Abstract

The invention discloses a backfill grouting restoring draw shaft process of metal mine. The process comprises the following steps: (1) exploring the damage extent of the wall rock of the draw shaft and filling the shaft with discrete materials; (2) drilling with a down-the-hole drill in the position which locates under the damage extent of the wall rock and is over 2m away from the bottom of the damaged rock; (3) using a grouting pump to grout in a drill hole; (4) installing an anchor cable in the drill hole after grouting; (5) using transportation system under the draw shaft to clean completely the loose media under a grouting interval, hanging-net shotcrete bolt supporting the top of the draw shaft and recovering the discharging mine function of the draw shaft. The process is applied to the dark draw shaft of iron mine, copper mine and lead zinc ore as well as recovering the dark draw shaft and the function of transporting ore.

Description

technical field [0001] The invention relates to a construction technique for chute repairing. More specifically, it relates to a technology for backfilling bulk grouting in metal mines and repairing slide shafts. Background technique [0002] The ore drawing in the chute is the main way of ore transportation in metal mines. The impact, extrusion and friction of the ore during the ore drawing process have a great destructive effect on the shaft wall. Generally, the surrounding rock of the chute shaft wall in the metal mine is not protected by the concrete shaft wall. The lumpiness control of the unloaded ore is not strict, resulting in damage to the shaft wall rock mass, and even large-scale slabs or collapses, and the occurrence of breakthroughs in adjacent shafts, which has a great impact on mine production. Contents of the invention [0003] One object of the present invention is to provide a kind of underground chute suitable for metal mines such as iron ore, copper or...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D20/00E21D20/02E21F15/00
CPCE21D11/10E21D20/003E21D20/02E21F15/005
Inventor 刘书杰刘志强冯旭海王成柱安许良贺宏伟
Owner BEIJING CHINA COAL MINE ENG CO LTD
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