Three-dimensional subdivision and a large number of collapsing mining methods
A mining method and mine collapse technology, applied in surface mining, underground mining, special mining, etc., can solve the problems of small stope scale, low stope productivity and collapse efficiency, and many operation cycles, and achieve low-cost effects.
Inactive Publication Date: 2011-12-14
CHINA MINMETALS CHANGSHA MINING RES INST
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Therefore, the existing mining methods at home and abroad have a small amount of ore collapse in one-time mining blasting, many operating cycles, small stope scale, low stope production capacity and low efficiency of ore collapse
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[0011] The mining object of the embodiment is a thick ore body or a steeply inclined medium-thick ore body. see Figure 1-Figure 4 , indicating that the vertical direction of the ore body is divided into stages by 60m to 180m, and the ore block is divided by 60m to 120m along the ore body trend within the stage; the L1 bottoming compensation space is set in the lower part of the ore block, and the three-dimensional range of the upper part of the ore block is divided C1-1, C1-2, C2-1, C2-2, C2-3, C2-4 six mining zones. Firstly, conventional technology is used to form the L1 bottom-drawing compensation space, and the volume of the space formed after bottom-drawing and mining is 10% to 18% of the total volume of the mining area. Groove cutting is carried out according to the conventional method in each mining subregion, and the ratio of the cutting volume to the volume of the corresponding subregion is less than or equal to 15%. In the six divisions of C1-1, C1-2, C2-1, C2-2, C...
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The invention discloses a method for mining mass caving ore in a three-dimensional sub region. The method comprises the following steps of: according to a thick and large ore body or a steeply inclined medium-thick ore body, dividing ore blocks along the trend of the ore body in phase and dividing the ore block into a compensation region and a mass-caving ore region; dividing explosive regions inthe mass-carving region within the three-dimensional range, wherein each explosive region is a partition provided with a separate cutting space and a blasting free surface; carrying out one-time collaborative blasting and centralized mass caving on all partitions in the mass-caving region of the ore blocks; and forming a compensation space in the ore block and then carrying out mass caving by adopting a mode of interval differential or a mode of simultaneously blasting various partitions. According to the method disclosed by the invention, according to the mass-caving area of one ore block, the carving is finished by one-time blasting within a three-dimensional range and large-scale and high-efficiency mass breakdown are achieved. The method provides a solution with safety, high efficiency, high yield and low cost for realizing large-scale centralized strengthened mining of the thick and large ore body or steeply inclined medium-thick ore body.
Description
technical field [0001] The invention relates to an underground mining method for metal mines. Background technique [0002] The underground mining methods commonly used in metal mines include stage mining methods, segmental mining methods, layered mining methods and their variants or combination methods. These mining methods all divide ore blocks or panels along the ore body to organize mining operations in stages; in the ore blocks or panels, cutting, mining operations and ground pressure management are carried out according to layered stopes or segmented stopes or stage stopes In the stope, a single blasthole or a row of blastholes are sequentially blasted and collapsed; an ore block or panel must go through multiple mining blasting and ground pressure management cycles to complete the mining task. Therefore, the existing mining methods at home and abroad have a small amount of collapsed ore in one-shot mining blasting, many operation cycles, small stope scale, low stope ...
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Inventor 周爱民
Owner CHINA MINMETALS CHANGSHA MINING RES INST