Trenching method of one-time blasting and layered shoveling in open-pit mines with large water inflow sags

A technology of water inflow and open-pit mines, applied in blasting, drainage, mining equipment, etc., can solve problems such as long duration, mine production reduction, and annual decline speed limitation, so as to improve the efficiency of shovel loading operations, ensure production capacity, and improve The effect of tunneling speed

CN111852555BActive Publication Date: 2021-08-03ZIJIN MINING GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-08-03

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Abstract

The invention relates to a trenching method for one-stage blasting and shoveling in a sunken open-pit mine with a large amount of water gushing, which includes trenching, blasting and shoveling operations, and is characterized in that the trenching operation includes arranging entry and exit trenches, section trenches, short-term collection The pool and the initial expansion; the blasting operation is divided into six sections and the blasting operation is segmented; the shoveling operation includes six shoveling operations, which can effectively reduce the impact of water inflow on the excavation of the new level of depression, improve the excavation progress of the new level, and release in time The lower ore volume ensures the mine's full and stable production. It has the advantages of reducing the impact of underground water gushing on the excavation of the new level of entry and exit ditch, improving the new level of excavation speed, penetration efficiency, trenching efficiency and shoveling efficiency, and quickly completing the new stage of depression ditching. It is suitable for earth and rock engineering applications , especially suitable for mining and metallurgy surface mining applications.
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Description

technical field

[0001] The invention relates to a ditching method for one-time blasting and layered shoveling in a sunken open-pit mine with a large water inflow, which is suitable for earthwork engineering applications, especially for mining and metallurgy open-pit mining applications. Background technique

[0002] The new level preparation of the open-pit mine mainly refers to digging in and out of the ditch from the level (steps), opening a section to reach the next level, and carrying out side expansion operations before the formation of the next new level, increasing the lower working space, and passing the new level of excavation. , release the ore volume in the lower part of the stope, ensure the balance of the secondary ore volume in the stope, and at the same time ensure the operation rate of mechanical equipment, ensure the mine's stable production, and maximize the economic benefits of the mine. In order to ensure a new level of rapid excavation, the width of the ...

Examples

Embodiment Construction

[0018] like Figure 1-2 As shown, the present invention proposes a trenching method for layered shoveling of primary blasting in a sunken open-pit mine with a large amount of water inflow, including trenching, blasting and shoveling operations, and is characterized in that the trenching operation includes arranging the entry and exit trenches [A] , open section ditch [B], short-term sump [C] and initial expansion [D]; piercing and blasting operation is divided into six sections and segmental piercing and blasting [11-16]; shoveling operation includes six times of shoveling [21 ~26], which can effectively reduce the impact of water inflow on the excavation of the new level sag, improve the progress of the new level of excavation, release the lower ore volume in time, and ensure the stable production of the mine.

[0019] The method of the present invention can further be

[0020] The entry and exit ditch [A] of the trench digging operation is divided into three sections, each ...