In the past, China stone mining used to adopt explosions and flame cutting to extract granite rough block; the advantages of this were that the mining technology is easy to grasp, it is highly efficient, and the cost is low. But the method is likely to contribute to excessive rock fragmentation and dark burn, which can result in a low rate of quarry stone. What's worse, the blasting vibration will damage the internal stone and influence the intensity of the stone; in addition, safety conditions for explosion mining are poor, and the waste materials are harmful to the environment. Therefore, in recent years, with the improvement of mining facilities and technologies, the explosion and flame cutting method has been eliminated.
Currently, the most commonly used mining method is saw cutting mining, which includes wire saws, chain saws, circular saws, etc. Applied diamond wire saw stone mining has a history that goes back more than 3,000 years in some foreign countries. In earlier times, the wire saws were simply used in soft stone cutting. With the unremitting joint efforts of wire saw manufacturers and mining companies, the wire saw mining technology has grown, and the costs have been reduced substantially. Currently, wire saws are widely applied in the stone mining of granite, marble, sandstone, etc
The stone mining industry in China is an emerging industry. It has been a little more than a decade's time since the mechanization and environmental protection in stone mining technology were first introduced to China. Now China has developed the independent intellectual property right in circular saws equipment and circular saw blades. Combined with other mechanical mining equipment, China is now able to meet the basic demand for the current stone mining domestically.
Since circular saw stone mining machines and relevant saw blades are developed independently, China's technical level stands for the advanced international level. The newly-developed mining method has the highest efficiency, the lowest cost, and the biggest stone block production both in China and abroad. At present, the circular saws in stone mining have double saw blades and single saw blades, and the machine types include the expanded type and the narrowed type. The largest diameter of the installed saw blades can be 4.6m, and the vertical saw cutting depth can reach 2m, which is in accordance with the high requirements of processing stone blocks.
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