How many holes are required to break 250000 tons

Assignment Help Civil Engineering
Reference no: EM13316933

Conduct a powder factor design for the following conditions: -Rock is iron ore; density is 5370 lb/cubic yards -Rock swells 60% from in situ when broken -Bench height is 45ft -Drill hole diameter is 12.25 inches -Explosive product will be 500lbs of Titan 1030 in the bottom of the hole to pull the toe and ANFO (Ge = 0.85) in the remainder of the hole -B:S = 1:1.2 -Use Konya's formula to determine B, and average (Rule of Thumb) value for J, T, PC, etc -Design for a Powder Factor of 0.70 lb/ton -How many holes are required to break 250,000 tons?

Reference no: EM13316933

Questions Cloud

How far away was the lightning bolt : Thunder is heard 4.0 sec after the flash of lightning is observed. If the outside temperature is 15 degrees celsius, how far away was the lightning bolt
Advise periwinkle of its fbt consequences arising out : Advise Periwinkle of its FBT consequences arising out of the above information, including calculation of any FBT liability, for the year ending 31 March 2014 and how would your answer to (a) differ if Emma used the $50,000 to purchase the shares h..
Plot the two test results on a shear stress-normal stress : At a confining pressure of 2000 psi, the first sample failed at 9000 psi. Then at a confining pressure of 5000 psi, the other sample failed at 21,000 psi. Plot the two test results on a shear stress-normal stress diagram and draw in Mohr envelope.
Calculate his break shot speed : the top of a pool table is 0.770 m from the floor. the placement of the tape is such that 0 m aligns to the edge of the table. calculate his break shot speed
How many holes are required to break 250000 tons : Conduct a powder factor design for the following conditions: -Rock is iron ore; density is 5370 lb/cubic yards -Rock swells 60% from in situ when broken -Bench height is 45ft -Drill hole diameter is 12.25 inches
Determine the increase in length of the wire : A wire is 1.50 m long and has a diameter of 1.50 mm. The tensile modulus of the wire is 6.20 x 1010 N/m2. what is the increase in length of the wire
Calculate the axial and radial strains and volumetric strain : A cylindrical soil, 75mm in diameter and 150 mm long, is radially compressed. The length increases to 153 mm and the radius decreases to 37.2 mm. Calculate: a) The axial and radial strains b) The volumetric strains
What is the charge on each ball : Two balls of identical mass of 0.151 kg and with identical charges placed on them hang from the ceiling on identical strings of lengths 1.510 m, what is the charge on each ball
What is the area of the input piston : A hydraulic lift is used to jack a 970 kg car 12 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 250 N. What is the area of the input piston

Reviews

Write a Review

 

Civil Engineering Questions & Answers

  Determine the net power produced by the cycle

An open system Brayton cycle has a heat input of 500 kW. The pressure ratio of is 15 and the mass flow rate of air through the engine is 1 kg/s. Right before compression the temperature of the air is 273K and the pressure is 70 kPa.

  Determine the ph of solution if an equivalent amount of naoh

A solution contains 300 mg/L of acetic acid. Determine the pH of the solution if an equivalent amount of sodium hydroxide (NaOH) is added to it. Determine the concentration of NaOH required (in mg/L).

  Calculate the maximum mixing height in meters

The atmosphere is stable with a lapse rate of -0.2C/100m. The surface air temperature is 15C. A parcel of air is released at the ground with a temperature of 25C. Calculate the maximum mixing height in meters.

  Determine what is the probability the lot is full

If vehicle arrivals at the lot follow a poisson process, with arrival rate lambda = 0.2 vehicles/hour, what is the probability the lot is full at 9:15 AM. Assume that no one leaves during this period.

  Derive an equation and solve for the volume v of a cstr

derive an equation and solve for the volume V of a CSTR, operated isothermically for the second-order reaction 2R->P, where rR=-kC^2 R. Data are k=6.0 L/mol-s, CRin=0.005 mol/L, CRout=0.0005 mol/L, and Q=100 L/s.

  What are the pressure and temperature in absolute units

A closed tank having a volume of 1.0 ft3 is filled with 0.15 lb of a gas. A pressure gage attached to the tank reads 12 psi when the gas temperature is 80 F. There is some question as to whether the gas in the tank is oxygen or helium.

  Determine the amount of cover over a culvert

A vertical curve of 600 ft in length is used to connect two tangents with the following locations: Tangent 1.- Point 1, Sta = 59+00, El = 1250.0' Point 2, Sta = 72+00, El = 1190.0' Tangent 2.- Point 1, Sta = 72+00, El = 1190.0' Point 2, Sta = 84+0..

  Estimate the settlement of 10ft and 5ft square footing

Footings for a structure are to be built beneath a basement slab on a clay soil at a depth of 20 ft below present ground level. The groundwater table is 15ft below the ground surface. The soil void-ratio is about 0.087.

  How much will be in the account at the end of 5 years

If you deposit $1000 per month into an investment account that pays interest at a rate of 6% per year, compounded quarterly, how much will be in the account at the end of 5 years

  How long would it take for the sled to reach at end of track

In 2003 at Holloman Air Force Base in New Mexico, test engineers set a world record by moving 192 lb payload at 6,453 miles per hour in a rocket sled. The rocket sled track, built in 1954, is 15.44 km in length.

  Determine length of an interval of time for atleast one call

determine the length of an interval of time such that the probability of at least one call in the interval is 0.90

  Determine how much runoff reached the river for the year

The average rate of flow measured in a gage at the outlet of the watershed was 30 m^3/sec. Estimate the water losses due to the combined effects of evaporation, transpiration, and infiltration due to ground water.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd