Continuous coal-mining technology for strip mine

Abstract

The invention relates to a coal mining technology, and provides a continuous coal-mining technology for strip mine so as to solve defects and shortcomings existing in an interrupt or semi-continuous coal-mining technology for strip mine at present. The method comprises the following working manner: a crawler travel type double-roller coal cutter bilaterally moves to and fro along the coal-mining propulsion direction and continuously cuts coal seam; when the coal cutter feeds every time, double rollers are raised and start to feed downwards from the upward side of coal wall; after feeding is finished, the double rollers are arranged up and down and front and back, and perform coal mining along the coal-mining propulsion direction; and mined coal is transferred to a scraper type continuous transportation set through a middle scraper conveying system at the lower part of the roller coal cutter for crushing and transferring, and finally through a discharge dolly moving along progress on a rigid rack of a working-face belt type conveyer, coal is discharged on the working-face belt type conveyer and is transported to an external conveying system. The method truly realizes continuous mining in the coal-mining propulsion direction and the working face direction, and is high in safety and reliability.

Description

technical field [0001] The invention relates to a coal mining process, in particular to a continuous coal mining process in an open-pit mine. Background technique [0002] The burial depth of coal mines is different, and different mining techniques can be used. When the coal seam is close to the surface, it is more economical to use open-pit mining. The main method is to use equipment such as dredges, backhoes, and trucks to remove the topsoil, which is filled into previously mined pits. After the topsoil is removed, the ore seam is exposed; at this point the ore blocks are drilled or blasted and the ore is trucked to a coal preparation plant for further processing. When the ore is mined, repeat the same steps next door. Coal mines use open-pit mining methods to obtain greater yields than underground mining methods. [0003] After searching relevant information, it is found that there are not many patents related to the surface coal mining process, and the closest patents...

AI Technical Summary

Problems solved by technology

The process method introduced in this patent is different from the present invention in two respects. Firstly, the continuous coal miner adopted in this patent only cuts coal in the advancing direction at a certain angle with the working face, and when withdrawing to the working face There is no coal cutting in the process of advancing the step distance, in fact, continuous coal mining is not really realized

[0006] ③ The coal mining process proposed in the patent with the publication number CN102889084A - "Continuous Mining Process for Thin Coal Seams in Open-pit Coal Mine" and the coal mining method adopted in the patent with publication number CN101899976A - "Continuous Coal Mining Process in Open-pit Coal Mine" The process is roughly the same, and no coal is cut during the retraction to the next advancing step, so it is not really continuous coal mining, it is a semi-continuous coal mining process

[0007] ④The patent with the publication number CN102947542A - "Continuous open-pit mining system", the mining system used in this patent is similar to the underground longwall coal mining system, and the mining system used is only suitable for the mining face that is generally vertical and laterally extending

Therefore, the scope of application of this patent is limited in open-pit coal mines, and it is not suitable for use on all open-pit coal mining faces

[0008] ⑤The patent whose publication number is CN102939434A——"Advancing Longwall System for Open Pit Mining", the technology adopted in this patent is also similar to the underground longwall coal mining technology, and the mining machine is working parallel to the mining face Moving the coal on the surface conveyor. Although this method realizes continuous coal mining, it requires a large investment in equipment, high mining costs, and insufficient flexibility. It is troublesome when moving and reversing.

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