Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Civil Engineering Expert

problem 1: What are the main purposes of drilling rock in Mining operations?

problem 2: Define the following terms with reference to drilling:

• Thrust
• Percussion
• Rotation
• Indexing
• Flushing
• Rifle bar
• Pull down

problem 3: Diamond drilling is used extensively in mining, for what purpose? Describe the methods available for core recovery. What impact does the number of core barrels have on core recovery?

problem 4: An open pit mine employs ANFO at a density of 0.85 g/cc as its explosive. Given the following details, determine the blasthole spacing.

• Blastholes are vertical and bench height is 11m.
• Burden and spacing of blastholes are the same, i.e. B = S.
• The specific gravity of the rock is 2.5.
• The powder factor is 0.5 kg of explosive per m3 of rock.
• Hole diameter is 225 mm.
• Stemming column length is 3 m and subdrill is 2m.

If ANFO has a cost of $950 per tonne, what will be the cost of explosives per tonne of rock?

problem 5: Describe in detail a Down the Hole Hammer Drill. What particular advantages does this type of drill have over other percussive methods of drilling?

What is the drillability of rock and which factors influence drillability?

Describe in detail the four essential characteristics of drill holes.

problem 6: Describe briefly the main properties of explosives.

problem 7: ANFO is used widely in mining applications, what are its advantages over other types of explosives and what disadvantages does it have.

problem 8: In underground blasting it is required to provide a free face or cut in the blasting pattern, why is this required? Describe two such cuts used. Detail the aims of a drilling pattern used in a blasting round.

problem 9: With respect to blasting, what does VOD mean? What does VOD actually measure? What range of VOD’s would you expect in modern commercial explosives? What is the maximum VOD you would expect from ANFO? How does blasthole size affect the VOD of ANFO?

problem 10: Modern explosives are made up of oxidisers, fuels, sensitisers and other ingredients. Give exs of these for:

• ANFO
• Heavy ANFO
• Emulsion

Civil Engineering, Engineering

  • Category:- Civil Engineering
  • Reference No.:- M98017
  • Price:- $70

Priced at Now at $70, Verified Solution

Have any Question? 


Related Questions in Civil Engineering

Set1 what is the combined effect of curvature and

Set 1. What is the combined effect of curvature and refraction for a 300 foot long level shot? 2. A level loop closed -0.09'. There were ten turning points in the loop. How much (and in what way) should the preliminary e ...

Prepare a set of profile leveling notes for the survey in

Prepare a set of profile leveling notes for the survey in Figure 2.34. In addition to computing all elevations, show the arithmetic check and the resulting error in closure.

Heat in the amount of 150 kj is transferred directly from a

Heat in the amount of 150 kJ is transferred directly from a hot reservoir at TH= 550 K to two cooler reservoirs at T 1 = 350 K and T 2 = 250 K. The surroundings temperature is T, = 300 K. If the heat transferred to the r ...

Calculate the percent voids between aggregate particles

Calculate the percent voids between aggregate particles, which have been compacted by rodding, if the dry-rodded unit weight is 88.0 lb/cu ft and the bulk dry specific gravity is 2.701.

Question explain why germanium and silicon are the element

Question: Explain why germanium and silicon are the element chosen for semiconductor?

Demonstrate meaning of setting out as used

Demonstrate meaning of setting out as used engineering.

Design a spherical tank with a wall thickness of 2 cm that

Design a spherical tank, with a wall thickness of 2 cm that will ensure that no more than 50 kg of hydrogen will be lost per year. The tank, which will operate at 500°C, can be made of nickel, aluminum, copper, or iron. ...

Essaymajor civt civil engineering technology1 define the

Essay Major: CIVT , Civil engineering Technology 1. Define the specialization/concentration of your field. 2. Describe the word ACRONYMS and list the acronym for your expected degree. e.g. CONS for Construction Technolog ...

What are the advantages of grillage foundation and why

what are the advantages of grillage foundation and why people prefers that? Attachment:- Advantages of grillage foundation.rar

Topic architecturedetailed question 2 drawings the first is

Topic: architecture Detailed Question: (2) drawings: the first is a comparison of the figure-ground of the two cities assigned by the faculty; the second, a comparison of their street sections. All drawings shall be comp ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate