Excavating method for bucket wheel excavator in open-pit mine rib spalling area

Abstract

The invention discloses an excavating method for a bucket wheel excavator in an open-pit mine rib spalling area. The excavating method comprises the following steps: first-layer excavating is conducted through the bucket wheel excavator, wherein the operation mode of first-layer excavating is that the bucket wheel excavator conducts rotation excavation from the stoped-out side towards the interiorof a step and then conducts rotation operation from the interior of the step towards the stoped-out side, after first-layer excavating is completed, forward propelling is conducted, and the bucket wheel excavator excavates repeatedly multiple times; after first-layer excavating is completed, a shovel is withdrawn for second-layer excavating, and second-layer excavating adopts the operation mode of first-layer excavating; after second-layer excavating is completed, the shovel is withdrawn for third-layer excavating operation, and third-layer excavating adopts the operation mode of first-layerexcavating, wherein the rotation angle of a bucket wheel arm of the bucket wheel excavator towards the stoped-out side is larger than 34 degrees; and after third-layer excavating is completed, next circulation is executed. According to the excavating method for the bucket wheel excavator, the bucket wheel excavator in the open-pit mine rib spalling area can be higher in operation adaptability andhigher in operation efficiency under the special condition.

Description

technical field [0001] The invention relates to the technical field of open-pit mining, in particular to a bucket-wheel excavator excavation method used in the open-pit ore flaking area. Background technique [0002] In the production process of open-pit mines, due to factors such as geological structure, step height, and rainfall, it is easy to form sidewalls locally, and the slope angle of steps slides from 47° to 10°-30°. When working, it is combined with bucket wheel excavator, loader, cable hopper car and belt conveyor. [0003] However, the existing bucket wheel excavator excavation method has the following defects: the bucket wheel excavator adopts layered operation, and the material on the upper part of the step will slide to the lower part due to the occurrence of a bumper on the working face, and the slope angle of the step at the bumper area is small. The distance from the steps is far away, and when the angle of rotation to the gob side is large when the lower m...

AI Technical Summary

Problems solved by technology

[0003] However, the existing bucket wheel excavator excavation method has the following defects: the bucket wheel excavator adopts layered operation, and the material on the upper part of the step will slide to the lower part due to the occurrence of a bumper on the working face, and the slope angle of the step at the bumper area is small. The distance from the steps is far, and when the angle of rotation to the gob side is large when the lower material is excavated, the equipment ladder of the bucket wheel excavator will collide with the steps, causing equipment damage

Moreover, due to the limitation of the working space, the bucket wheel excavator in the gang area cannot fully extract the

At the same time, backhoes and trucks need to cooperate in advance, resulting in a waste of equipment capacity and affecting the operating efficiency of the bucket wheel excavator, and the adaptability and flexibility of the equipment in the gang area is poor

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