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Filling stope pillar recovery mining method

A mining method and bottom pillar technology, applied in the fields of backfill, ground mining, mining equipment, etc., can solve the problems of increasing the complexity of ore pillar mining, poor mining conditions, and ore pillar deformation, so as to reduce dilution and loss. , the effect of reducing insecurity and high-efficiency recycling

Inactive Publication Date: 2010-06-09
招金矿业股份有限公司大尹格庄金矿
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Problems solved by technology

[0002] At present, many non-coal underground mines in my country adopt the filling mining method, that is, the ore block is divided into a mine room and a mine pillar, and the mine room is mined first, and then the mine pillar is mined. The complexity of ore pillar mining even causes a large backlog and loss of underground resources. In this way, the mining conditions of ore pillars are worse than those of mining houses. The conversion rate and loss rate are much larger than mines
[0003] According to statistics, the proportion of ore pillar ore volume is about 20-50% of the total mining ore volume, and some can reach 50-60%. The mining conditions of underground residual ore pillars are extremely complicated, which is a major problem in today's mining technology. At present, many mines often fail to achieve the expected results due to technical or economic difficulties when recovering pillar resources

Method used

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  • Filling stope pillar recovery mining method
  • Filling stope pillar recovery mining method
  • Filling stope pillar recovery mining method

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Embodiment Construction

[0022] 1. The height of the ore body is from the roof of the existing stope to the floor of the bottom layer of the upper middle stope, with an average height of 8.0 meters and an average width of 16 meters. Two pillar stopes are arranged perpendicular to the strike of the ore body, each stope is 7 meters wide, and a 2-meter column is reserved in the middle.

[0023] 2. Construct a cutting patio on the top wall of each stope, with a specification of 2.0×2.0 meters and a height of 8 meters to the bottom floor of the upper and middle stope, as the free surface for the initial inclined ore falling.

[0024] 3. Adopt 7655 air-leg rock drill with rated air volume of 60l / s, impact frequency of 35Hz, drill bit of Φ40mm inline, and drill inclined parallel holes with an inclination angle of 60 degrees.

[0025] 4. After the working plane is formed, the distance between the ore-falling blastholes is 1.2 meters, the minimum resistance line is 0.7 meters, and 11 rolls of charges are charg...

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Abstract

The invention relates to a filling stope pillar recovery mining method. Because drilling is carried out below an inclined plane of a safer ore-breaking upper layer, recovery of inbreak of obturation lagging behind part of ore body is ensured, the obturation is avoided to be mixed into ore body heap, the ore recovery rate is improved and the dilution and the loss of the ore are reduced. Meanwhile, because the construction of other development engineering is not carried out, the ore removal efficiency and the stripping ratio are far higher than those of other pillar recovery methods. Finally, the obturation inbreak naturally piles up and extrudes the stope inclined plane to form an active pressure so as to play a role of a certain support on the stope top plate and provide a subsequent drilling operation platform for effectively and safely recovering pillars. The obturation gravity is converted into the support force of the stope top plate so as to reduce the instability of the pillar recovery process and ensure the safety of the equipment and the personnel in the subsequent works of drilling, ore removal and the like. The invention is suitable for stope recovery of a filling mining method, wherein the rock mass is firm, the protodyakonov scale of hardness is 7-12, and the pillar thickness is 5-9 m.

Description

Technical field: [0001] The invention relates to a mining method, in particular to a mining method for recovering bottom pillars in a filling method. Background technique: [0002] At present, many non-coal underground mines in my country adopt the filling mining method, that is, the ore block is divided into a mine room and a mine pillar, and the mine room is mined first, and then the mine pillar is mined. The complexity of ore pillar mining even causes a large backlog and loss of underground resources. In this way, the mining conditions of ore pillars are worse than those of mining houses. The conversion rate and loss rate are much larger than those of mining houses. [0003] According to statistics, the proportion of ore pillar ore volume is about 20-50% of the total mining ore volume, and some can reach 50-60%. The mining conditions of underground residual ore pillars are extremely complicated, which is a major problem in today's mining technology. At present, many mines...

Claims

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Application Information

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IPC IPC(8): E21C41/16E21F13/06E21F15/00
Inventor 穆太升刘兴义闵国清王涛滕海清
Owner 招金矿业股份有限公司大尹格庄金矿
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