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

Te force system consists of the force p - 300i 200j

The force system consists of the force P = - 300i + 200j + 150k lb and the couple C. Determine the magnitude of C if the moment of this force system about the axis DE is 800 lb · ft.

Synthesize a circuit using only in gates for each

Synthesize a circuit using only IN gates for each expression in problem 3.3. Problem 3.3 Give a truth table for each of the following logical expressions.

For the following transfer function tvs v2 s v1sa

For the following transfer function T V (s) = V 2 (s) =V 1 (s) (a) Construct the straight-line Bode plot of the phase. (b) Use the straight-line phase diagram to estimate the phase at ω = 10, 100, 1000, and 10,000 rad=s. ...

Consider the general model of a clocked sequential circuit

Consider the general model of a clocked sequential circuit shown in figure 4.12. Suppose that the building blocks are governed by the following parameters: A. What is the minimum clock period that will ensure correct ope ...

A pitot tube with a yaw angle of 10 is used for the airflow

A Pitot tube with a yaw angle of 10? is used for the airflow in Prob. 7.39. What would be the indicated stagnation and dynamic pressures? Express in units of Pa, lbf/in 2 , and inH 2 O. Prob. 7.39 An open-ended stagnatio ...

Design an rbf network to perform the classification

Design an RBF network to perform the classification illustrated in Figure E17.1. The network should produce a positive output whenever the input vector is in the shaded region and a negative output otherwise.

The step response transform of a linear circuit isa is the

The step response transform of a linear circuit is (a) Is the circuit a low-pass, high-pass, bandpass, or bandstop filter? (b) Construct the straight-line Bode gain plot and estimate the cutoff frequency and passband gai ...

An open-circuit wind tunnel draws in sea-level standard air

An open-circuit wind tunnel draws in sea-level standard air and accelerates it through a contraction into a 1 m-by-1 m test section. A differential pressure transducer mounted in the test section wall measures a pressure ...

Question if y1 and y2 are alternate depths of a rectangular

Question: If y 1 and y 2 are alternate depths of a rectangular channel show that y c  → Criticle depth 2y 1 ²y 2 ²/(y 1 +y 2 ) = Y c 3 and hence the specific energy, E = (y 1 2 + y 1 y 2 +y 2 2 )/(y 1 + y 2 ) No of Pages ...

An lvq network has the following weightsi how many classes

An LVQ network has the following weights: i. How many classes does this LVQ network have? How many subclasses? ii. Draw a diagram showing the first-layer weight vectors and the decision boundaries that separate the input ...

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen