Room-and-pillar mining method for medium-thickness gently inclined ore bodies with waste rock interlayer

A kind of gently inclined, mining method technology, applied in surface mining, underground mining, special mining and other directions, can solve the waste of resources, manpower and material resources, reduce the value of the mined ore, and the ore grade of the mined ore cannot reach the selected grade. , to achieve the effect of large production capacity, low poverty loss and high resource utilization rate

Active Publication Date: 2017-03-15
CINF ENG CO LTD
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Problems solved by technology

This kind of practice has great disadvantages, which greatly increases the dilution rate of mining, reduces the value of the mined ore, and may even lead to the failure of the mined ore grade to meet the requirements of the selected grade, resulting in the loss of resources, manpower and material resources. great waste of

Method used

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  • Room-and-pillar mining method for medium-thickness gently inclined ore bodies with waste rock interlayer
  • Room-and-pillar mining method for medium-thickness gently inclined ore bodies with waste rock interlayer
  • Room-and-pillar mining method for medium-thickness gently inclined ore bodies with waste rock interlayer

Examples

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Embodiment 1

[0034] Example 1: Shallow-hole layered room-and-pillar mining method for rock bolt roof protection in a mine in Guizhou.

[0035] The No. 2 ore body mined in the first phase of a certain mine has an average inclination angle of 26.40°. The stability of the surrounding rock of the roof and the immediate roof of the mine is generally poor, and the stability of the surrounding rock of the floor and the immediate floor is good. body, and the waste rock interlayer needs to be removed from the refractory ore body. The Mn geological grade of the lean ore in the upper layer of No. 2 ore body is 13.21%, with an average thickness of 2.77m; the Mn geological grade of the lower rich ore raw ore is 17.04%, with an average thickness of 2.00m; the Mn geological grade of the interlayer waste rock is 6.25%, with an average thickness of 0.89m. Combined with the actual physical characteristics and grades of the No. 2 ore body ore and interlayer waste rock in a certain mine, under the premise tha...

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Abstract

The invention relates to a room-and-pillar mining method for medium-thickness gently inclined ore bodies with waste rock interlayer. The room-and-pillar mining method includes arranging stope along the stroke of the ore bodies, reserving continuous pillars in the stope, and dividing the inside of the stope along the strike of the ore bodies into a plurality of stoping units; carrying out layer mining on the insides of the stoping units in stoping sequences from top to bottom, to be more specific, mining upper ore beds at first, reserving ore beds with certain heights, supporting roofs by the aid of anchor rods, rejecting waste rock in the interlayer between upper and lower ore beds and ultimately stoping the lower ore beds; upwardly advancing stoping from cutting roadways and advancing working faces from one side of the stope towards the other side of the stope along inclined directions in a stepped manner. The widths of rooms are equal to the horizontal thicknesses of the ore bodies. The room-and-pillar mining method has the advantages of safety, high efficiency and low dilution and loss rate.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a room-pillar mining method of medium-thick and gently inclined interlayer ore bodies containing waste rocks. Background technique [0002] For the mining of the difficult-to-mining ore body with medium-thick and gently inclined waste rock interlayer, and the waste rock interlayer needs to be removed, there is no good mining method at home and abroad. The usual method is to interlayer waste rock and ore Rock drilling and blasting are carried out together, and the waste rock is extracted together with the ore. This kind of practice has great disadvantages, which greatly increases the dilution rate of mining, reduces the value of the mined ore, and may even lead to the failure of the mined ore grade to meet the requirements of the selected grade, resulting in the loss of resources, manpower and material resources. a great waste. Contents of the invention [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22
CPCE21C41/22
Inventor 贺锋坚淡永富曾凌芳薛希龙段进超
Owner CINF ENG CO LTD
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