The method of rapid depression and trenching in open-pit mine with large water inflow

Abstract

The present invention relates to a method for rapid depression digging in a large water inflow open-pit mine. According to the hydrogeological conditions of the mine site, the mining area is divided into a large water inflow area and a small water inflow area, and an advanced drainage pool is arranged in the large water inflow area. Excavation forms a three-layer layered advanced drainage pool, arranges access ditches in the area [B] with a small water inflow, and excavates to form three sections of access ditches and subsequent opening ditches, side extensions, and excavator access steps, which can achieve a relatively small water inflow. In large cases, quickly complete the new stage of depression ditching work. It has the advantages of effectively reducing the impact of water inflow on the new level of sag excavation, improving the new level of excavation progress, releasing the lower ore volume in time, ensuring the mine's full and stable production, and maximizing the mine's economic benefits. It is suitable for earthwork engineering applications. Especially suitable for mining and metallurgy surface mining applications.

Description

technical field [0001] The invention relates to a method for quickly recessing and digging trenches in open-pit mines with a large amount of water gushing, which is suitable for earthwork engineering applications, and is especially suitable 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 for the formation of the next new level, increasing the lower working space, and passing the new level. , 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 in open-pit mines, the wid...

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Problems solved by technology

[0003] With the gradual downward mining of the open-pit mine, the mining depth continues to deepen, and it enters the mode of depression mining or even deep depression mining. After the new level reaches the static water level of the open-pit mine, the depression work at the new level below it will inevitably be greatly affected by the water inflow. The wading depth of excavation equipment is limited, generally not more than 1m. Therefore, for open-pit mines with large water inflows, the benefits of new-level excavation work will be further reduced. Premature production reduction, long duration, and even the dilemma of relying on the upper steps and unfinished preparations for the new lower level, cannot guarantee the continuity of production capacity, which greatly affects the economic benefits of the mine

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