About Tunneling rock drill operating procedures
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6 FAQs about [Tunneling rock drill operating procedures]
What type of drilling equipment is used in tunneling & drifting?
Rock drills and mechanized drilling equipment used in tunneling and drifting are designed to give optimum performance in this hole range. Drifting rods are designed to match hole sizes and needs of horizontal drilling. Typical applications use tunneling rods and 1 1/4" and 1 1/2" drill steel sizes.
What are the safe job procedures for drill operation?
recommended safe job procedures for drill operation. It is designed for use in the training of dril operators and helpers. Where the dril crew is also involved in explosives transport should be used in conjunction with this module. excavators, drillng and blasting of the overburden is necessary. Highwall drils are used
How do you design a drilling pattern in tunneling?
When designing a drilling pattern in tunneling, the main goal is to ensure the optimum number of correctly placed and accurately drilled holes. This helps to ensure successful charging and blasting, as well as produce accurate and smooth tunnel walls, roof and floor.
What size hole do you need for tunneling & drifting?
Most tunneling operations today are based on hole sizes between 38 -51mm in diameter. Only cut holes are larger than 51mm. Rock drills and mechanized drilling equipment used in tunneling and drifting are designed to give optimum performance in this hole range. Drifting rods are designed to match hole sizes and needs of horizontal drilling.
How deep can a rock driling hole be drilled?
depths generally do not exceed 100 feet. The cuttings from rock driling generally make good stemming material. Compressed air is used to flush these cuttings from the hole. Drillng is frequently the most expensive operation in a surface mine. The cost justifies careful study and experiment to determine the most effcient hole diameter, spacing and
What is a safe working zone for air rock drill?
t as per manufacturers recommendationsAll necessary guards & safety devices are in place protecting w ers from all moving & rotating parts. “Safe Working Zones” are clearly defined in all work sp ces where air rock drill is being used.