Flat-bottomed trench shallow hole shrinkage method

A shallow-hole ore retention method and cutting ditch technology, which is applied in surface mining, underground mining, special mining, etc., can solve the problems of inability to recover the output ore and mixed rock, the difficulty of ore extraction and recovery, and the loss of ore. The effect of improving quality indicators, increasing production capacity, and reducing rock mixing rate

Active Publication Date: 2010-01-27
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

The ore output grade is lowered due to the interlayer rock mixing, and the ore mixing rate of some mine cars exceeds the standard, resulting in loss and dilution of ore, especially the recovery of critical grade ore recovery in the blasting chamber. Larger, so that part of the output ore and mixed rock exceed the standard and cannot be recovered and lost

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  • Flat-bottomed trench shallow hole shrinkage method

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Embodiment Construction

[0012] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0013] Such as figure 1 As shown, the method for retaining ore in flat-bottomed trenches and shallow holes of the present invention is characterized in that the mining process is: ore mining in the second section of the mine → loading of ore by a horizontal trackless forklift → ore extraction by transport equipment, that is, pulling the bottom horizontally, secondary The crushing level is merged at the same level until it is at the same level as the transportation level, forming a flat-bottomed ditch. The bottom ditch is adopted to extract ore. According to the occurrence of the ore body and the existing engineering conditions, it is determined to excavate a horizontal transport roadway 1 in the footwall of the ore body along the ore body trend, and excavate a vein-piercing trackless roadway 5 to the ore body at intervals of 25m to form a ...

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Abstract

The invention belongs to the technical field of underground mining processes, in particular to a flat-bottomed trench shallow hole shrinkage method. The mining process comprises: ore mining from a two-section bord, ore loading by a horizontal trackless forklift and ore removal by transportation equipment, namely pull-bottomed plane and secondary pulverization plane are combined on the same plane till on the same level with transportation plane to form a flat-bottomed trench; the method adopts a bottom trench ore removal mode; the bottom of the bord is a plane; ore on the pull-bottomed plane is a triangular ore pillar; according to the occurrence condition of an orebody and the prior engineering condition, the orientation of the orebody is determined in a horizontal subsection; a horizontal transportation tunnel is dug in an orebody footwall; a cross vein trackless ore removal tunnel is dug towards the orebody in every 25 m to form a cross vein ore removal and vein-following loading transportation mode; the ore removal tunnel selects the vein-following arrangement or the cross vein arrangement of the ore removal tunnel according to the width of the orebody; and the number of the ore removal trench is 1 to 2. The flat-bottomed trench shallow hole shrinkage method improves the operating rate and reduces loss and dilution.

Description

technical field [0001] The invention belongs to the technical field of mining technology in underground mines, in particular to a method for retaining ore in flat-bottomed trenches and shallow holes. Background technique [0002] The shallow hole ore retention method is to extract the ore from the mine house through the bucket shaft and drop the ore to the rake roadway, and the ore is dumped by the rake winch to the ore chute. The rock interlayer in the ore body is in the ore extraction process It is impossible to eliminate all the ore mixed into the chute, and the inspection department can only check whether the ore truck is qualified according to the ore output inspection standard formulated within each mine to decide whether to choose or not. The ore output grade is lowered due to the interlayer rock mixing, and the ore mixing rate of some mine cars exceeds the standard, resulting in loss and dilution of ore, especially the recovery of critical grade ore recovery in the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F13/00
Inventor 卢光亮刘波涛李延伟
Owner ANSTEEL GRP MINING CO LTD
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