Combined mining method for non-steeply inclined upper and lower ore beds separated by soft and thin gangue layers
A technology of combined mining and mining methods, applied in underground mining, mining equipment, surface mining, etc., to achieve the effect of improving ore mining grade and mine recovery rate
Active Publication Date: 2021-09-03
ZIJIN MINING GROUP
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Problems solved by technology
In the retrieved prior art, there is no report on the recovery of the broken ore body interlayer in the stable ore seam, which is well connected with the more stable ore bodies on both sides of the interlayer, so as to realize safe and efficient mining of the broken ore body interlayer
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[0025] Such as Figure 1-5 Shown, the non-steeply inclined upper and lower ore seam combined mining method of weak and thin gangue layer separation of the present invention, applicable conditions: a. the ore seam inclination angle is little, is gently inclined ore body to inclined ore body, is not suitable for upward layered filling method mining; b. The gangue layer divides the ore layer vertically into upper and lower layers of ore. The gangue layer is weak, low in strength, easy to weather and cannot be self-stabilized after excavation, and the thickness is thin to medium thick. The gangue layer contains low grade minerals, and the gangue layer is not allowed Mixed mining with the ore seam; c. The lower ore layer is relatively thick and high-grade, which is the main industrial ore layer; the upper ore layer is relatively thin and low-grade, which is the secondary industrial ore layer; d. The thickness of the single-layer ore body is thin to medium-thick ore body ; e. Insuff...
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The invention discloses a combined mining method for non-steeply inclined upper and lower ore beds separated by soft and thin gangue layers. The combined mining method comprises the following steps: a segmented haulage roadway and an air return roadway are tunneled in a secondary industrial ore bed (upper ore), ore blocks are divided along the trend, two cutting uphill parts are tunneled in the upper ore at two ends of the trend of the ore blocks, a cutting uphill part is tunneled in the lower core in the middle of the trend to be connected with the segmented haulage roadway and the air return roadway through a haulage cross-cut and an air return cross-cut, and an upper and lower ore bed combined mining preparation system is formed. Strike filling strips and open-stope strips are divided at intervals in the inclination direction of the ore body, and the mining sequence is as follows: mining lower ore of the filling strips by the cutting uphill part of the lower ore; a lower ore goaf area of the filling strips is filled, and roof contact and consolidation are effectively performed; the ore blocks are divided into left and right sides along the trend by taking the cutting uphill part of the lower ore as a boundary, and the two sides are subjected to separately mining; one cutting uphill part of the upper ore is used for mining the upper ore and the gangue layer of the open-stope strips on one side, separated mining and separated transportation are carried out, and gangue is poured into a nearby goaf; the lower ore of the open-stope strips subjected to the step 3 is mined through the cutting uphill part of the lower ore; and after stoping of all the open-stope strips on one side is completed, the open-stope strips on the other side are mined through the other cutting uphill part of the upper ore and the cutting uphill part of the lower ore until mining of the ore blocks is completed.
Description
technical field [0001] The invention relates to a mine mining method, in particular to a non-steeply inclined upper and lower mine layer combined mining method separated by weak and thin gangue layers, which is suitable for mine mining applications. Background technique [0002] Mining methods are of great economic and technical significance to the normal, safe and efficient mining of mines. Because the deposits of each mine vary widely, there are various mining methods, which is commonly known as "one mine, one method" in the industry. For this reason, a lot of research has been carried out on mining methods, such as Chinese patent: CN111441773A discloses "a kind of method for retaining mining pillars by the room-pillar method of gently inclined medium-thick ore body", and CN 108468565B discloses "for nearly horizontal coal seam long-wall fully mechanized mining Cementation filling equipment and method thereof", CN109630115 B discloses "subsection empty field subsequent fil...
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IPC IPC(8): E21C41/22E21C37/00E21F15/00E21F17/00
CPCE21C41/22E21C37/00E21F15/00E21F17/00
Inventor 彭云王彦君邹保春
Owner ZIJIN MINING GROUP