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Mechanical continuous mining method for hard rock

A mining method and hard rock technology, which is applied in the field of mechanized continuous mining of hard rock, can solve problems such as low efficiency, small scale, and sensitive mining costs, and achieve the effects of high mining safety, large production capacity, and small stress concentration

Inactive Publication Date: 2020-03-17
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology

At present, high-grade gently inclined thin ore body resources are gradually exhausted, and a large number of gently inclined thin ore bodies are very sensitive to mining costs. High-efficiency and large-scale mining of gently inclined thin ore bodies is the only option to reduce the mining cost of gently inclined thin ore bodies. The shortcomings of the traditional semi-artificial and intermittent full-scale method and the room-and-pillar method of low efficiency and small scale have gradually become prominent, and it is necessary to continue to find new high-efficiency large-scale mining methods suitable for gently inclined thin ore bodies

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  • Mechanical continuous mining method for hard rock
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Embodiment Construction

[0018] Xunyang County Zhongbao Mining Co., Ltd. Gangou lead-zinc mine is a typical gently inclined thin ore body in China. The shape of the ore body is mainly layered. Zinc ore, the average zinc grade of the ore body is 3.93%; the ore body is generally inclined to the northeast, with a dip angle of 10°-35°, and the thickness of the ore body is 1.00-2.00m, with an average thickness of 1.64m. In order to realize the economic benefits of the mine, a hard rock mechanized continuous mining method according to the present invention was tested in the middle section of 500m. The panel production capacity is 450-500t / d, and the mining cost is 8.45 yuan / t, and the effect is good. A specific implementation of a hard rock mechanized continuous mining method in Gangou lead-zinc mine is as follows:

[0019] Such as Figure 1-2 Shown, a kind of hard rock mechanized continuous mining method comprises the following steps:

[0020] 1) Structural parameter division: Arrange the panel along the...

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Abstract

The invention belongs to the technical field of metal mining, and discloses a mechanical continuous mining method for hard rock. The mechanical continuous mining method comprises the steps of separating room strips from pillar strips, which are arranged at intervals, in a panel in the direction of an ore body; arranging a scraper crossheading at the bottom of a stope along the strike, tunneling anair return drift at the top of the stope, and respectively tunneling false-inclined pedestrian and equipment rises at two ends of the ore body to enable an upper stage to communicate with a lower stage; mining the room strip ore body by a tunneling machine along the strike from top to bottom and according to a zigzag line push stoping sequence, and leaving the pillar strip ore body not be processed temporarily; partially stoping the pillar strip ore body by a short-hole drill jumbo, and allowing the pillar strip ore body which is not stoped to form point pillars; and reinforcing a roof depending on the stable condition of the roof with the proceeding of stopping. Compared with a traditional semi-artificial and interrupt comprehensive method or room-and-pillar method, the mechanical continuous mining method has the advantages of large production capability, low production cost and high safety, and mechanical continuous mining of a gently-inclined thin ore body is achieved.

Description

technical field [0001] The invention relates to the technical field of mining of metal deposits, in particular to a method for mechanized continuous mining of hard rock. Background technique [0002] Gently inclined thin ore bodies are a type of ore bodies that are difficult to mine. For this type of ore bodies, various wall caving methods, room-and-pillar methods and comprehensive methods are mainly used. It is widely used in gently inclined thin ore body mines because of its high production efficiency, relatively simple mining process, better panel ventilation conditions and relatively ideal poverty index. At present, high-grade gently inclined thin ore body resources are gradually exhausted, and a large number of gently inclined thin ore bodies are very sensitive to mining costs. High-efficiency and large-scale mining of gently inclined thin ore bodies is the only option to reduce the mining cost of gently inclined thin ore bodies. The shortcomings of the traditional sem...

Claims

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Application Information

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IPC IPC(8): E21C41/22
CPCE21C41/22
Inventor 李浩张海磊孟慧媚
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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