Sawing and mining of stone materials refers to the method of cutting rocks into a certain shape and lumpiness by various stone masonry of different sizes, mechanical saw, wedge and blasting, etc., to be used as raw materials for masonry and finishing materials of civil and architectural engineering and separating them from rock masses.
By means of marble chain saw machine, wedge and blasting, the rock is cut into a certain shape and lumpiness, and separated from the rock mass. The rock is used as raw materials for masonry and finish materials for civil and construction projects. Stone has been used in civil and architectural engineering for thousands of years, the Egyptian pyramid, the foundation of the Forbidden City in Beijing, China, the stone steps and railings, stone archways of the Ming tombs, etc., are all carved with stone masonry of various sizes. But form complete stone material industry system, have history of 100 years only. Modern various emerging building materials (such as cement, etc.), to a large extent, replaced the stone, but some permanent buildings, important public and social activities in the building, still need to use a lot of natural stone materials for decoration and wall materials. If Chinese yun hua, white marble, dandong is green, hang ash, Italian xi na is golden marble, African blue granite is waited, it is the best seller on international market, its demand grows ceaselessly.
The mining step height mainly depends on the type of lifting equipment. When using mobile crane, it is generally 5 ~ 10m, while when using fixed tower crane, it can reach more than 10m. Large equipment can save the amount of preparation work, so that the step height has a tendency to increase. The step height of a saw cutting is mainly determined by the specification of the column and its drilling device, generally 2 ~ 3m. The disadvantage of wire rope saw is that the cutting pressure is not big. Recently, the production capacity of vibrating wire rope saw can be improved by 32 ~ 40% than that of stable transmission. Italy, the Soviet union has begun to use diamond wire rope saws.
Flame burning flame cutting method with a flame thrower rocks, forming cut surface to split the rock and is used only for stoping containing more quartz mineral rock, only vertical stone cutting, cutting groove loss is bigger, in case there are three free surface, the most commonly cut two sides, best cut only one side, the other two surface with blasting or clink separation method. The faces cut by flame should be chosen on the most difficult sections and rough surfaces. Noise in the production process is as high as 120dB, which is harmful to the environment and workers.
