Rotary Drilling and Blasting in Large Surface Mines by Bhalchandra V. Gokhale

By Bhalchandra V. Gokhale

During this exact reference quantity, rotary blasthole drilling and floor blasting, as utilized in huge floor mines, are comprehensively lined. either new and vintage ideas, ideas and methodologies are awarded, supported through quite a few illustrations and useful information. In 26 chapters, drilling, floor blasting, rock, rock mass, equipment, instruments and add-ons, compressors and air flushing, computing and perform are many different proper topics are handled; the 1st sixteen chapters take care of rotary blasthole drilling, and the ten subsequent chapters with the ideas, concept and perform of blasting. in addition, the 14 appendices offer important technical and advertisement facts, to additional help the reader to layout, plan, execute and calculate blasthole drilling operations. This quantity is meant for execs and technicians in mining, exploration, geological and mechanical engineering, who're concerned with the layout, making plans and execution of rotary drilling and blasting operations in floor mines.

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For a long time, machines having a rotating drum with long teeth have been used for scraping the top bituminous layers of roads. This is also an example of ripping. Recently, similar but very heavy and powerful machines have been introduced in the mining industry under the name ‘Surface Miner’. Some small mines and civil engineering contractors opt for such surface miners. 10. 8 Three shank ripper attachment behind a crawler dozer. 9 Formation rippability chart. 10 A surface miner. Surface miners are equipped with a rotating drum on their front side.

This is sometimes carried out by using different types of equipment. All the activities narrated in the above paragraphs are together called surface mining, or open pit mining, or opencast mining. Large pieces of rocks are used in the construction of dams, breakwaters and the substrate of road and railway embankments. Smaller crushed rock pieces of different sizes are used in large quantities for making concrete used for the construction of objects such as dams, bridges, harbor wharves, buildings etc.

Blastholes are drilled in rock masses that have a high degree of uniformity. In surface mining the blastholes are drilled in a more or less uniform rock mass. This rock mass may be stratified but the properties of the strata do not vary greatly. In underground mining, and particularly in tunneling, the rock mass characteristics may greatly differ from one place to the other but the variation within a group of, say, 100 blastholes is very small. For other purposes of drilling, the variety of rock masses can be very large.

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