Double drum mining machine mining process

Abstract

The invention relates to a mining process of a double-drum mining machine, in which high-grade mineral material is preset in the upper layer of the upper and lower layers or in the middle layer of the upper, middle, and lower layers, and is cut obliquely by moving the two drums with a distance. The method of feeding the knife and the front and rear drums in the middle part on the same track or superimposed mining, mining high-grade ore first, and then mining low-grade ore when returning, and reserving part of low-grade ore during the loading process of low-grade ore The floating material is on the bottom plate, and after pushing the conveyor groove, the height of the reserved middle and low grade floating material is equal to the top surface of the lower layer or the lower middle and low grade mineral material, which provides for the subsequent high grade mineral material to flow directly into the conveyor. foundation, which increases the output rate of high-grade ore materials. The invention can solve the problem of independent cutting and loading of thin high-grade mineral materials, improves economic benefits, and avoids interference between mining machines and conveyors in traditional techniques.

Description

technical field [0001] The invention relates to a mining process of a double-drum mining machine, which is suitable for the mining of thin ore layers and medium-thick or thinner layers, and is especially suitable for selecting and mining high-grade ore or high-grade ore mixed mining faces, and belongs to the technical field of underground mining . Background technique [0002] For the mining of bauxite layers, the thickness of the ore layer varies greatly, and the distribution of mineral grades varies significantly. Since the economic value of high-grade ore is much higher than that of low-grade ore, the key to mining is to produce and maintain high-grade ore. Because the thickness of high-grade ore is often thin, the drum needs to be as small as possible under the premise of ensuring the cutting capacity. On the other hand, for the mining of ore rock, a larger cutting capacity is required, so the mining machine is required to have a larger-sized cutting arm. When the min...

AI Technical Summary

Problems solved by technology

When the mining machine equipped with a small-diameter drum and a thick-sized cutting arm is mined according to the existing comprehensive mechanized mining technology, especially during the oblique cutting process of the end cutting knife, such as Figure 23 As shown, it is easy for the cutting arm to interfere with the side of the conveyor groove, and it is difficult to achieve normal operation

[0003] In order to simplify operations and improve efficiency, the industry usually uses larger diameter drums to mine medium and high-grade minerals in thin ore layers. At the same time, if the loading problem is not handled well, the mined ore is likely to be mixed with low-grade floating material, making the final output of ore grade low, so it is impossible to achieve high-value grade ore. mining

[0004] It can be seen that there is no good solution for the cutting and loading of thin high-grade mineral materials.

Images