Continuous transportation must have a large number of caving ore, continuous mining and mining equipment.
The current mining technology can provide a large amount of ore for continuous transportation:
( 1 ) Mining with a continuous mining machine. And potassium salt of weak coal layer ore, blast without drilling, to complete using cut off the ore mining and haulage machines, to be detached from the minerals mined ore, the ore falls to achieve, even extents haulage Continuous production of a series of mining operations, such as roadway transportation and goaf processing. The comprehensive mining face of coal mine adopts coal mining by integrated coal mining unit, which is a typical example of continuous mining of weak ore bodies. There are also examples of underground mining of potash deposits.
Metal ore deposits tend to be more rigid, Ore occurrence and form complex, there is no a wear-resistant, high efficiency, low cost cutting tool and adapt to changing ore body morphology occurrence of mining machines for production application. 70 to 90 years on behalf of the foreign individual metal mining, mining machine cutting tried hard gold-bearing quartz veins (such as South Africa individual gold) and hammer mining machine mining hard copper mine, but they were not out of the experimental stage. The actual mining machine has been used, only the French Lorraine iron ore, by the room and pillar mining continuous mining machine, the crab claw loader transporter, trackless haulage equipment.
( 2 ) Mining thick ore bodies by stage natural caving. When the thick ore body is mined by the stage natural caving method, after the bottoming is cut, the ore naturally collapses, and the amount of ore that can be released is large, and continuous ore and continuous transportation become a means to control the ore caving. Accurate control of the amount of ore, and the implementation of planned ore mining, is the key to controlling the continuous collapse of the ore body in the natural collapse method. Therefore, the development of effective and controllable continuous transport processes and equipment is a topic of concern in the mining industry.
( 3 ) Continuously recover in one step. When the deep hole is massively collapsed and returned to the thick ore body of the hard ore, the rock drilling, blasting and mining are carried out continuously in different spaces. The amount of mines in a blasting collapse is more than 10,000 tons, so that the mining and transportation can be carried out continuously and the efficiency is also high. Soviet e.g. phosphorus ore, with a large number of bundle deep caving, vibrating the vibrating conveyor and the continuous mining machine ore, a stope production capacity of 9600 tons / classes. This type of mining process is comparable to the semi-continuous mining process of open pit mines.
Sweden and Canada, other countries in the study with a mobile crushing apparatus continuous loading and workmanship and continuous haulage apparatus. Sweden spent $12.5 million on five years to conduct preliminary industrial tests in its test mines.
The conditions for continuous transportation are:
( 1 ) There are a large number of ores that can be transported, and are suitable for bulk;
( 2 ) Continuous transportation equipment with convenient installation and demolition and reliable operation;
( 3 ) Mining method solutions that enable continuous transportation. The study of natural caving in this stage is worthy of attention.
In particular, the study of the natural caving mechanism of ore that can control the fragmentation of ore should be given priority.
The current mining technology can provide a large amount of ore for continuous transportation:
( 1 ) Mining with a continuous mining machine. And potassium salt of weak coal layer ore, blast without drilling, to complete using cut off the ore mining and haulage machines, to be detached from the minerals mined ore, the ore falls to achieve, even extents haulage Continuous production of a series of mining operations, such as roadway transportation and goaf processing. The comprehensive mining face of coal mine adopts coal mining by integrated coal mining unit, which is a typical example of continuous mining of weak ore bodies. There are also examples of underground mining of potash deposits.
Metal ore deposits tend to be more rigid, Ore occurrence and form complex, there is no a wear-resistant, high efficiency, low cost cutting tool and adapt to changing ore body morphology occurrence of mining machines for production application. 70 to 90 years on behalf of the foreign individual metal mining, mining machine cutting tried hard gold-bearing quartz veins (such as South Africa individual gold) and hammer mining machine mining hard copper mine, but they were not out of the experimental stage. The actual mining machine has been used, only the French Lorraine iron ore, by the room and pillar mining continuous mining machine, the crab claw loader transporter, trackless haulage equipment.
( 2 ) Mining thick ore bodies by stage natural caving. When the thick ore body is mined by the stage natural caving method, after the bottoming is cut, the ore naturally collapses, and the amount of ore that can be released is large, and continuous ore and continuous transportation become a means to control the ore caving. Accurate control of the amount of ore, and the implementation of planned ore mining, is the key to controlling the continuous collapse of the ore body in the natural collapse method. Therefore, the development of effective and controllable continuous transport processes and equipment is a topic of concern in the mining industry.
( 3 ) Continuously recover in one step. When the deep hole is massively collapsed and returned to the thick ore body of the hard ore, the rock drilling, blasting and mining are carried out continuously in different spaces. The amount of mines in a blasting collapse is more than 10,000 tons, so that the mining and transportation can be carried out continuously and the efficiency is also high. Soviet e.g. phosphorus ore, with a large number of bundle deep caving, vibrating the vibrating conveyor and the continuous mining machine ore, a stope production capacity of 9600 tons / classes. This type of mining process is comparable to the semi-continuous mining process of open pit mines.
Sweden and Canada, other countries in the study with a mobile crushing apparatus continuous loading and workmanship and continuous haulage apparatus. Sweden spent $12.5 million on five years to conduct preliminary industrial tests in its test mines.
The conditions for continuous transportation are:
( 1 ) There are a large number of ores that can be transported, and are suitable for bulk;
( 2 ) Continuous transportation equipment with convenient installation and demolition and reliable operation;
( 3 ) Mining method solutions that enable continuous transportation. The study of natural caving in this stage is worthy of attention.
In particular, the study of the natural caving mechanism of ore that can control the fragmentation of ore should be given priority.
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