Michae
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Detailed Comparison and Interpretation of Five Common Blasting Methods in Open-pit Mining.._ Work
Original Title Detailed Comparison and Interpretation of 5 Common Blasting Methods in Open-pit Mining Editor's note We know that open-pit mining operations mainly include drilling blasting mining transportation and dumping Blasting is a very important part of it and the cost of blasting accounts for 15-20% of the total cost of open-pit mining Moreover the quality of blasting directly affects the efficiency of mining transportation coarse crushing and other equipment and the total cost of the mine Today Xiaobian will share several common blasting methods in open-pit mining and their application rock drilling tools Classification of blasting methods
Deep-hole blasting Deep-hole blasting is a blasting method that uses drilling equipment to drill deeper boreholes as the charging space of mining explosives The deep-hole blasting of open-pit mine is mainly the production blasting of bench Deep-hole blasting is a widely used blasting method in open-pit mines The depth of the blast hole is generally 15 to 20 m The aperture is 75 ~ 310 mm and the common aperture is 200 ~ 250 mm Characteristic Applicable conditions Deep-hole blasting is widely used in the production links of ditching stripping and mining in large mines Its blasting volume accounts for more than 90% of the total blasting volume of large mines Classification Deep holes can be divided into vertical deep holes and inclined deep holes Vertical deep holes are mostly pierced by impact piercers Inclined deep holes are mining dth bit mostly drilled by rotary drills or down-the-hole drills Its inclination is generally 75 ° to 80 ° Chamber blasting Chamber blasting is to place explosives in a pre-chiseled chamber and charge them centrally There are no rules for the amount of explosives detonated each time some of which are loaded with tens Mining Drilling Equipment hundreds or thousands of tons Because of the large amount of blasting it is also called large blasting Applicable conditions Open-pit mines are used only during the capital construction period and under specific conditions and quarries are used when conditions permit and when the demand for mining is high
The working platform is required to be wider to accommodate the ballast pile; (3) The blasting pile height is large which may affect the safety of excavator operation In addition no matter what kind of blasting method is used the Blasting Safety Regulations must be strictly implemented during blasting operations safety warning signs must be set up and warning work must be done to ensure the safety of personnel and property Source Construction Machinery Viewpoint ·END· Return to Sohu to see more Responsible Editor wt-dthtools.com
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