Combined step milling method of strip mine semi-continuous system

Abstract

The invention discloses a combined step milling method of a strip mine semi-continuous system. The combined step milling method comprises the following steps that a, a first excavation belt for mining a main mining step is taken as an initial point to mine a first width of the main mining step in the direction of a machine head; b, multiple width mining operations of the main mining step are completed, and a working surface conveying machine is moved; c, movement of the main mining step is completed and excavation of the multiple mining widths is completed, the semi-continuous system is shifted into the first with mining of the next step, and after mining is completed, an excavator continues to carry out notch forming on the next width of the next step, and the next width is excavated; and d, after multiple width mining operations of the next step are completed, the working surface conveying machine is moved. The combined step operation is adopted in the combined step milling method, the exploitable yield of the semi-continuous system within a one-time movement period is effectively increased, the one-time movement service period of the system is prolonged, and therefore the production efficiency of the system is improved.

Description

Technical field [0001] The invention relates to the field of open pit mining, in particular to a combined step mining method of an open pit semi-continuous system. Background technique [0002] At present, domestic open-pit mines have begun to introduce semi-continuous or full-continuous systems for mining material handling, and adopt the system for single-step mining and parallel advancement. [0003] When the inclination angle of the open-pit coal floor becomes larger and the seam increases with the depth of the floor, the step division and mining parameters of the semi-continuous coal mining system will be adjusted accordingly. For this reason, the existing single-step coal mining semi-continuous system in domestic open-pit mines The mining method has the following shortcomings: [0004] (1) The equipment layout lacks flexibility; [0005] (2) Poor adaptability to changes in geological conditions (such as increased inclination of coal seam floor); [0006] (3) The adjustment of min...

AI Technical Summary

Problems solved by technology

[0004] (1) Equipment layout lacks flexibility;

[0005] (2) Poor adaptability to changes in geological conditions (such as larger dip angles of coal seam floors);

[0006] (3) The adjustment of mining parameters (such as the height of the steps) must be coordinated with other production processes, and the production efficiency of the system is reduced

Images