Question: An alternative mining plan is to develop two levels, below the upper A Level, and mine only the high grade. The B Level would be

An alternative mining plan is to develop two levels, below the upper A Level, and mine only the high grade. The B Level would be in the 43 ft of high grade, while the C level would be in the lower 20 ft of high grade in the 102 ft column shown in the detailed geologic column. Determine the maximum possible roof span for the B Level.

Step by Step Solution

★★★★★

3.49 Rating (172 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Given New mining plan Problem 32 18 11 14 43 25 20 Find Lmax BLevel Bonneterre ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

26-E-G-R (270).docx

120 KBs Word File

Students Have Also Explored These Related Geological Engineering Questions!

With reference to Problem 9, determine the maximum possible roof span, given that all roof rock must have a safety factor greater thanone. To (102) psi (MPa) Co (103, psi (MPa) E (106) psi (GPa) Rock...

For Problem 15-16, develop upper and lower con-trol limits for the range. Do these samples indicate that the process is in control? In Problem 15-16, Colonel Electric is a large company that produces...

For Problem 16-16, develop upper and lower control limits for the range. Do these samples indicate that the process is in control?

An alternative mining plan is to develop two levels, below the upper A Level and mine only the high grade. The B Level would be in the 13.1 m of high grade, while the C level would be in the lower...

REVISION QUESTIONS MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is a generic term that covers a broad range of...

A multilevel room and pillar metal mine is under consideration in flat strata striking N60E. Entries are planned on strike, crosscuts up, and down dip. Table 6.6 shows depths and material properties...

A STUDENT GUIDE TO INTRODUCTORY & FOUNDATION LEVEL CASE STUDY ASSIGNMENTS Using the 8 Step American Management Association (AMA) Problem Solving and Case Analysis Process Sally Armstrong, May 2005....

those question are very easy . just simply search from annual report which i provided and answer the questions. those questions were supposed to be done within 3 hours in the class. but i got this as...

A multilevel room and pillar metal mine is under consideration in flat strata striking N60E. Entries are planned on strike, crosscuts up, and down dip. Table 6.8 shows depths and material properties...

5. Hydrogen atom momentum space wavefunction [2+1+2+1] The time independent momentum space wavefunction in three dimensions is defined by: o(p) = (2h)3/2e-i(pr)/(r)dr (a) Find the momentum space wave...

A communication system has an SNR(dB) of 97 dB and bandwidth of 7 Kilohertz. What is the maximum data rate of the system in Kilobit/s? Calculate to one decimal point.

Select all that apply Select the financing activities from the list below. (Check all that apply.) Multiple select question. Purchasing equipment Issuing stock Issuing a note payable Purchasing land

Based on the graphs below, which stock has more systematic risk, and which stock has more unsystematic risk? Stock #1 -30 Merket return Stock #2 -30

a. Suppose that, over the long run, the risk-premium on stocks relative to Treasury bills has been 7.6 % in the United States. Suppose also that the current Treasury bill yield is 1.5%, but the...

The partnership agreement of Angela and Dawn has the following provisions: 1. The partners are to earn 10 percent on the average capital. 2. Angela and Dawn are to earn salaries of $25,000 and...

In teams, select a public company that interests you and is a business that requires inventory. Obtain the company's most recent annual report on Form 10-K. The Form 10-K is a company's annually...

Sendelbach Corporation is a U.S.-based organization with operations throughout the world. One of its subsidiaries is headquartered in Toronto. Although this wholly owned company operates primarily in...

A certain gasoline engine has an efficiency of 30.0%. What would the hot reservoir temperature be for a Carnot engine having that efficiency, if it operates with a cold reservoir temperature of 200C?

A torque T = 20(103) lb .in is applied to the weldment shown. Estimate the maximum shear stress in the weld throat. br> tin iIt

Find Io in the network shown. 12 V

Use nodal analysis to find V0 in the circuit shown. 12 6V 4

To finance the purchase, you have arranged for a 30-year mortgage loan for 80 percent of the $2,800,000 purchase price. The monthly payment on the loan will be $22,000. What is the principal...

Determine whether the linear transformation T is one-to-one and whether it maps as specified Question 8 (1 point) Determine whether the linear transformation T is one-to-one and whether it maps as...

Which constraint results in a least upper bound for the optimal number of Deluxe Bags? Cutting & Dyeing Sewing Finishing Inspection & Packaging -Select-abcdItem 1 2. Which constraint results in a...