2012年11月15日星期四

The Natural Stone Quarrying Methods

In our daily life, you could see the natural stone withs,s or other types, which are widely used in the home interior or exterior decoration, but do you know that it is a difficult task to cut them into cubic blocks, then into the finisheds. Would you like to know more about it? OK, here we go!The second method is blasting. First drill hole on the ore body, put explosives inside, and then blast the rock into large blocks by blasting, finally drill the blocks into cubic blocks. Since the shock wave produced by blasting has a bad effect on the ore body, the general ratio of blocks yield is around 30%. Due to the cracks in the blocks, while cutting it into sheets, the ratio of yield is below 50%. Thus, both home and abroad prohibit the blasting method of quarrying for the sake of resources.The third method is mechanical. Use a machine to drive wire saw or diamond wire saw to abrade circularly the ore body, and cut the rock into blocks. This quarrying method can produce high ratio of block yield and of yield, but it requires a great amount of investment in mechanical equipment and technical personals to operate, thus this method is suitable for quarrying in large-scale mines.
What?s Tombstone
Natural Granodiorites
Features of Bluestone

没有评论:

发表评论