A Deep Hole Mining Method in Stages of Steeply Inclined Double Layer Ore Body

Abstract

The invention discloses a high-dipping double-layer ore body stage deep-hole mining method, which is especially suitable for recovery of a high-dipping double-layer ore body, wherein the ore rock is stable, the thickness of the lower layer of ore body is more than or equal to 15 m and the thickness of the upper layer of ore body is more than or equal to 8 m. The lower layer of ore body is mined and then the upper layer of ore body is mined, a lower layer of ore body stope is arranged vertical to the direction of the ore body, an ore room and an ore column are recovered in two steps, an upper layer of ore body stope is arranged vertical to the direction of the ore body, and an ore room and an or column are recovered in two steps. Recovery of the upper layer of ore body and the lower layer of ore body is as follows: stage large-diameter deep-hole blasting ore break down is adopted, the ore room is mined, then the ore column is mined, the bottom of 6 to 10 m and the top of 4 to 6 m of a dead zone are filled with high-strength cemented filling bodies after recovery of the ore room and the ore column, the other dead zones of the ore room are filled with the cemented filling bodies, andthe other dead zones of the ore column are filled with low-strength cemented filling bodies or non-cemented filling bodies. The high-dipping double-layer ore body stage deep-hole mining method has theadvantages of high operation safety, small stope preparation cutting engineering quantity, short stope preparation time, high stope production capacity, high efficiency and the like.

Description

technical field [0001] The invention belongs to the field of underground mining, and in particular relates to a steeply inclined double-layer ore body stage deep-hole mining method, which is especially suitable for steeply inclined double-layer ore bodies with stable ore rocks, a lower layer ore body thickness ≥ 15m, and an upper layer ore body thickness ≥ 8m of recovery. Background technique [0002] The occurrence conditions of non-coal mines, especially non-ferrous metal mines, are ever-changing, and they are often produced in layers, with interlayered stone layers in the middle, especially steeply inclined double-layer ore bodies. accounted for a considerable proportion. [0003] When the distance between the upper and lower layers of ore bodies is relatively long, that is, when the thickness of interlayer rocks is large, the difficulty of mining is relatively small. At this time, the upper and lower layers of ore bodies can be regarded as two independent ore bodies tha...

AI Technical Summary

Problems solved by technology

If the upper and lower ore bodies, that is, the interlayer of interlayers, are considered as a complete ore body, that is, the interlayers are not removed, and the upper and lower ore bodies and interlayers are mined together. At this time, there is no mining sequence for the upper and lower ore bodies. There are mutual constraints and problems in engineering layout, but it is impossible to effectively remove rock inclusions. The mixing of a large amount of waste rocks will greatly increase ore dilution, reduce the ore grade, and affect the overall economic benefits of ore mining. If the upper and lower ore bodies are considered separately, it can be Effectively remove rocks and improve the ore grade, but at this time will face the problem of mutual restriction of the mining sequence of the double-layer ore body. If effective technical means and measures are not taken, the mining of one layer of ore body will destroy the other layer of ore body. The mining environment of the other layer of the ore body makes it difficult to recover the other layer of ore body or cause large losses and dilution. At the same time, the layout of the mining and cutting engineering of the upper and lower layers of the ore body is very difficult, and a large number of mining and cutting projects are often required

[0005] For this reason, the present invention provides a deep-hole mining method in the stage of steeply inclined double-layer ore bodies, aiming at solving the problem of mining of steeply inclined double-layer ore bodies with stable ore rock, thickness of the lower layer of ore body ≥ 15m, and thickness of the upper layer of ore body ≥ 8m. Faced with the above-mentioned problems such as the mutual restriction of the mining sequence and the inability to effectively and fully utilize the mining and cutting engineering

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