Bottom ore receiving structure for natural caving mining and mining method
A caving mining and mining method technology, applied in surface mining, mining equipment, underground mining, etc., can solve the problems of hopper jamming, high safety risk, and difficulty in dealing with jammed buckets, so as to increase the diameter of the mine and avoid clogging. Effect
Pending Publication Date: 2021-07-02
KUNMING UNIV OF SCI & TECH +1
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Problems solved by technology
[0003] The main purpose of the present invention is to provide a bottom ore receiving structure and mining method for natural caving mining, so as to solve the problem that in the prior art, when a large block of natural caving is encountered, the funnel is easily stuck when using multiple intensive funnel receiving methods. The bucket, the stuck bucket is difficult to handle and has a large safety risk, which is not conducive to the stability of the bottom structure and other issues
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Embodiment 1
[0020] Such as Figure 1-3 As shown, a bottom ore-receiving structure of natural caving mining includes dividing the ore body into a bottom-drawing level and an ore-out level in a vertical direction from top to bottom, and an ore pillar 3 is arranged between the bottom-drawing level and the ore-out level. In the ore pillar 3, the ore piercing vein 1 is excavated. In actual operation, projects such as joint roads, air shafts, and chambers to be excavated simultaneously under the prior art are also included.
[0021] The bottom-drawing level is a certain distance higher than the ore-exiting level, and two bottom-drawing roadways 5 parallel to the ore-piercing vein 1 are arranged. The blasting loose ore at the bottom layer of 10-15 meters is formed after the packing explosives are blasted, and the upper ore body gradually cracks and breaks down after the release of the lower loose ore under the action of its own weight or stress; in order to ensure the effect of the bottom blasti...
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The invention relates to the field of mines suitable for natural caving mining, and particularly discloses a bottom ore receiving structure for natural caving mining and a mining method. The mining method comprises the steps of dividing an ore body into a stope drift level and an ore removal level from top to bottom in the vertical direction, arranging ore pillars between the stope drift level and the ore removal level, excavating ore removal transverse drifts in the ore pillars, arranging two parallel stope drift roadways in the stope drift level higher than the ore removal level by a certain distance, forming fan-shaped blast holes in the stope drift roadways, excavating a continuous ore receiving trench roadway in parallel with the ore removal transverse drifts at a certain distance, and communicating the ore removal transverse drifts with the trench roadway through ore removal linkage channels, wherein the ore removal linkage channels are asymmetrically staggered at equal intervals, and the trench roadway forms a continuous V-shaped ore gathering trench after fan-shaped blast hole blasting is performed according to the production requirement. According to the bottom ore receiving structure for natural caving mining and the mining method, a through channel formed by the ore pillars between adjacent ore removal linkage channels is directly canceled, the height and inclination of a main ore pillar on the upper part of the ore removal transverse drifts are increased, and finally, a strip continuous V-shaped ore receiving and gathering trench is formed, so that the purposes of increasing the ore receiving caliber and avoiding large ore blockage are achieved.
Description
technical field [0001] The invention relates to the field of mines suitable for natural caving mining, in particular to a bottom ore receiving structure and mining method for natural caving mining. Background technique [0002] Natural caving mining is to blast a thin layer of ore body through horizontal drilling and blasting at the bottom, and make full use of its own structural characteristics and stress to cause the internal cracks in the upper ore body to gradually develop, destroy and collapse. A lower cost method of mining up to caving to the upper midsection or surface. With the continuous development of natural caving mining, more and more low-grade large-scale mines have gradually begun to be researched and applied, and a large number of natural caving mines are equipped with multiple dense funnels at the ore level of the bottom structure to draw ore, such as The natural caving mining method (patent CN112253111) is a rectangular frame in Figure 4. This method is ve...
Claims
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Login to View More IPC IPC(8): E21C41/22E21D9/14
CPCE21C41/22E21D9/14
Inventor 李争荣侯克鹏冯兴隆崔晓东吴明杜桂泉刘明武洪超
Owner KUNMING UNIV OF SCI & TECH