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However, in contrast to the increasing amount of bauxite mining, the current domestic mining equipment is relatively backward and scarce. Many of the mining operations are carried out by manually loading the truck after blasting, and then passing the track and hoisting. Pulling the mine car under the wellhead, and then using the lifting device to transport the mine car to the mining mode outside the well, the risk factor and mining cost are high, and the production efficiency is low. It is far from meeting the current resource requirements, safety and environmental protection, and cost reduction of the enterprise. Needs.
According to the preliminary grasp of the current underground bauxite mine, the author believes that the ground mining can be divided into two categories: small-scale and large-scale. According to different mining characteristics, the ground mining equipment can focus on the development, innovation and breakthrough.
The first is small-scale mining. The ore body is small and disorganized. It is mostly in the form of "chicken nests." This kind of mine has many roadways and large gradients, and the geological conditions are very complicated. Although the blasting operation saves time and effort, it has a destructive effect on the internal balance of tunnels, roofs, etc. It is recommended that mining equipment manufacturers research and develop small rock drilling equipment and implement mechanized excavation of ore bodies to reduce blasting hazards and improve mining. safety. At the same time, small-scale ore loading equipment can be developed simultaneously. People and vehicles can be separated from each other, and buttons or handles can be used to control loading equipment to reduce labor costs and improve work efficiency. It should be noted that whether it is rock drilling or loading equipment, it must be small and light, and it can be quickly transported, disassembled, and adapted to the complex environment and operating conditions in the mine. As for the transportation of ore to the outside of the well, it is still possible to adopt an easy way of orbiting, winding and transportation.
Secondly, for large-scale land mining, this type of ore has a certain scale of ore body, relatively large investment in various hardware facilities, and the overall operating environment and conditions are relatively good. For such mines, it is particularly important to increase production to dilute the cost. Therefore, detachable medium-sized and large-scale rock drilling equipment are indispensable, and efficient and efficient loading equipment must also be available, and the ore transport facilities are more important here. The author proposes two kinds of equipment development and configuration schemes. First, if the ore itself is relatively finely divided or the well is broken, then the well-belt conveyor and bucket-lifting can be used. If all the conditions are met, the belt can also be used. The method of transporting the ore through one or more flat wells without passing through the vertical shaft; the other is that if the ore is hard to break and does not have the conditions for flat well production, a two-way track must be laid to take the coal train continuously. The method of transportation is to the wellhead, and then the mine car is transported to the well by means of a lifting device. In order to improve work efficiency, the lifting device can also be set to double or multiple sets of operation.
In addition, according to the national regulations on mining management, the six major systems of monitoring and monitoring, downhole personnel positioning, emergency hedging, air pressure self-rescue, water supply and rescue, and communication and communication must be deployed in the ground mining industry. These systems must ensure the safety of personal production. Effectively improving the production quality of mining has a very positive promotion role. It can be closely linked with the current advanced technologies such as wireless and information, with the overall consideration of mining and transportation equipment, and scientifically and rationally conduct research and development, selection and configuration. (Li Yongxin)
In recent years, with the "explosive" growth of China's alumina industry, the domestic quality bauxite resources have dried up. Taking Henan Province, a key region of China's aluminum industry, as an example, the reserves of shallow bluish applicable bauxite resources have drastically decreased over the past 10 years. Almost no more than 6 aluminum or silicon equivalents have been found. The severe resource crisis has prompted many alumina companies to launch mineral processing projects in order to ease the shortage of ore resources, and also focused on the bauxite resources under the formation. At present, the lands that have been built or are under construction in Henan Province are mainly distributed in Zhengzhou, Luoyang, Sanmenxia and other areas. The mining of coal-bearing bauxite has also been put on the agenda of some enterprises.