Rib-pillar-free continuous sublevel filling method for mining preparation in medium-thickness slope crushed ore body vein

Abstract

The invention discloses a rib-pillar-free continuous sublevel filling method for mining preparation in a medium-thickness slope crushed ore body vein. The method comprises the following steps of: dividing a mine block into panel structures with a plurality of sections and bunches, namely dividing sections in a panel, not leaving a rib pillar in the sections, and dividing continuous extraction units; arranging a slope ramp of the panel on an ore body hanging wall, and arranging sectional roadways namely rock drilling ore removal gate ways in the vein; making all the sectional roadways in the panel mutually communicated, and the allocation and transportation of trackless equipment flexible and convenient; performing quarry central up cutting before the extraction, and ensuring the deep hole construction in a quarry upward sector in good conditions; performing operation such as multiple-section quarry rock drilling, blasting, supporting, ore removing, filling and paralleling; using a rib-pillar-free continuous extraction way backing from two wings of the panel to the center in the same sectional quarry, wherein an extraction process is performed sequentially; and filling a gob with tailings or waste stones. The invention relates to the rib-pillar-free continuous sublevel filling method suitable for medium-thickness slope crushed ore bodies, which has a low mining preparation ratio, low loss and high efficiency and the extraction is safe.

Description

technical field [0001] The present invention relates to a method of continuous segmental filling of quasi-inverted columns in veins of medium-thick and inclined broken ore bodies, in particular to a method of continuous segmented filling of quasi-inverted columns in veins of gently inclined-inclined medium-thick broken ore bodies. It is mainly suitable for the mining of gently inclined-inclined medium-thick ore bodies with long ore bodies, relatively regular ore bodies, and less stable rocks, and requires large production capacity and high efficiency. It is also suitable for similar ore bodies mined by filling method. technical background [0002] For the world's difficult-to-mining type of ore body, which is gently inclined-inclined and medium-thick, the segmented open-field method is widely used at home and abroad, such as patent No. 85103513 "Segmented open-field caving mining method for continuous withdrawal along the strike", and No. 1458390 " Anchor Roof Protection Seg...

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Problems solved by technology

[0002] For the world's difficult-to-mining type of ore body, which is gently inclined-inclined and medium-thick, the segmented open-field method is widely used at home and abroad, such as patent No. 85103513 "Segmented open-field caving mining method for continuous withdrawal along the strike", and No. 1458390 " Anchor Roof Protection Segmented Empty Field Method for Phosphate Mining", CN1474032A "Step-by-Segment Extrusion Collapse Followed by Filling Continuous Mining Method", etc. Although these methods are simple in process and advanced in technology, the biggest disadvantage is that the out-of-vein The mining volume is large and the dilution loss rate is high, so it is only suitable for mining ore bodies with low value

With the increase of ore price, the patent CN 1904313A "concrete column roof protection mining method" has the advantages of high recovery rate, but the production capacity of ore blocks is small, the concrete column pouring process is complicated, and the labor intensity of workers is high, so it is only suitable for mining ore rocks. Relatively stable horizontal-sloping ore body below medium thickness

There is currently no suitable mining method for ore bodies with thick, inclined and broken ore bodies, especially those with unstable footwall ore bodies that require large production capacity, small mining ratio, and low loss rate.

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