Question: Prescribe a bolting plan for entries driven 28 ft (8.5 m) wide in the lower coal seam in the sketch using the dead weight load

Prescribe a bolting plan for entries driven 28 ft (8.5 m) wide in the lower coal seam in the sketch using the dead weight load approach. Include nominal bolt diameter, length, grade of steel, installation tension, and spacing. Support your recommendation withcalculations.

Rock type E-106 r-pcf (kNim?) Co-psi (Mpa) Topsi (Mpa) h-ft (m) psi

Rock type E-106 r-pcf (kNim?) Co-psi (Mpa) Topsi (Mpa) h-ft (m) psi (Gpa) I Over-burden 2 Massive Sandstone 1694 (516) 1714 (522) 1.70 (I1.7) 3.00 (20.7) 50 (0.34) 850 (5.86) I44.0 (22.8) 148.2 (23.4) 0.25 1,000 (6.9) 19,000 (131.0) 0.20 3 Coal 4 Layered sandstone 5 Massive sandstone 6 Sandy shale 7 Coal 8 Massive sandstone 75.0 (11.9) 0.30 3,500 (24.I) 149.5 (23.6) 1.50 (10.3) 0.10 17,500 (120.7) 700 (4.83) 0.35 (2.4) 130 (0.90) 1719 (524) 1741 (531) 1744 (532) 148.2 (23.4) 3.00 (20.7) 0.20 19,000 (131.0) 850 (5.86) 170.0 (26.9) 75.0 (11.9) 148.2 (23.4) 4.50 (31.0) 0.35 (2.4) 3.50 (24.1) 0.10 0.30 15,000 (103.4) 3,500 (24.1) 19,500 (134.5) 1,000 (6.90) 1,300 (8.97) 1,000 (6.90) 1747 (533) 1754 (535) 1778 (542) 0.20 9 Layered sandstone 2250 (658) 149.5 (23.6) 1.50 (10.3) 0.10 17,500 (120.7) 700 (4.83)

Step by Step Solution

★★★★★

3.31 Rating (169 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Given Sketch data Wo28 ft lower seam Find Using dead weight load approach a bolting p... 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 (235).docx

120 KBs Word File

Students Have Also Explored These Related Geological Engineering Questions!

A steel cable with nominal diameter 25 mm (see Table 2-1) is used in a construction yard to lift a bridge section weighing 38 kN, as shown in the figure. The cable has an effective modulus of...

A in-16 UNF series SAE grade 5 bolt has a -in ID tube 13 in long, clamped between washer faces of bolt and nut by turning the nut snug and adding one-third of a turn. The tube OD is the washer-face...

A 7 ft m tall steel cylinder has a cross sectional area of 15 ft2. At the bottom with a height of 2 ft m is liquid water on top of which is a 4 ft high layer of gasoline. The gasoline surface is...

Coal is mined in two seams that are shown in the sketch. Mining is full seam height in both seams. Entries are 24 ft wide (7.3 m).With reference to the stratigraphic column and rock properties in the...

A thin "low" metallurgical coal seam 3 ft thick is mined at a depth of 980 ft. The main entries are mined 4 ft into the R1 roof stratum to give sufficient clearance for track haulage. With reference...

A thick seam of coal is mined from the floor to a height of 13 ft at a depth of 1,450 ft. With reference to the stratigraphic column in the sketch and the rock properties given in Table 5.2, assume L...

With reference to the strata data given in the sketch and Table 5.3, seam depth is 1670 ft (509 m), strata dip is negligible and entries are planned 24 ft (7.32 m) wide. Mining height from the...

With reference to the strata data given in the sketch and Table 5.4, seam depth is 1,324 ft (404 m), strata dip is negligible and entries are planned 21 ft (6.4 m) wide. Mining height from the...

0405441 Human Factors and Ergonomics Assignment 1 1. Summarise the events of Piper Alpha disaster based on the two articles found on the BB (in less than 500 words). 2. What were the causes of this...

Gapco manufactures three products, whose daily labor and raw material requirements are given in the following table. The profits per unit of the three products are $25, $30, and $22, respectively....

For each of the following, determine the expected cashflows. Probability Assessment Cash Flow Estimate $ 4,800 6,300 7,500 (a) 20% 50% 30% $ 5,400 (b) 30% 7,200 8,400 50% 20% (c) $(1,000) 3,000 5,000...

Suppose that an MSC student collects data for 72- monthly exchange rates for US dollar and Pounds against KSH. She estimated the long-run relationship between US dollar and Pounds and reports the...

FIN 3 6 8 0 - 1 0 2 _ INTRODUCTION TO FINANCE ( SE curstion 4 0 Tret terred nete out of leg puretion Who owns the NYSE? Select one: exisa b . specialises c . dealers d . floor brokees : e ....

Minor Company, is authorized to sell 1,200,000 shares of $10 par value common stock and 60,000 shares of $100 par value 6 percent preferred stock. As of the end of the current year, the company has...

The actual cash received from cash sales was $36,183, and the amount indicated by the cash register total was $36,197. a. What is the amount deposited in the bank for the days sales? b. What is the...

The 2012 balance sheet for Kimberly-Clark Corporation indicates that the company has 1.2 billion shares of common stock authorized, of which approximately 428.6 million have been issued. In addition,...

Merchandise is sold on account to a customer for $12,500, terms FOB shipping point, 1/10, n/30. The seller paid the freight of $400. Determine the following: (a) Amount of the sale, (b) Amount...

After the amount due on a sale of $25,000, terms 1/10, n/eom, is received from a customer within the discount period, the seller consents to the return of the entire shipment. The cost of the...

9.40 Suppose the probability is p 5 .2 that a person who purchases an instant lottery ticket wins money, and this probability holds for every ticket purchased. Consider different random samples of n...

Find 1/0 in the network shown. 10 k 12 W

Find 10 in the network shown. 10 k 12 W

In testing the wear life of gear teeth, the gears are assembled by using a pretorsion. In this way, a large torque can exist even though the power input to the tester is small. The arrangement shown...

computech Corporation is expanding rapidly and currently needs to retain all of its earnings hands it does not pay dividends however investors expect computech to begin paying dividends beginning...

The central economic characteristic of a city's base activities is that they: give the city influence in the larger world are industrial bring in income from the larger world bring recognition and...

In hypothesis testing we set alpha, the significance level, which limits the likelihood of making a Type 1 error if the null hypothesis were true. When does a type 2 error occur? Give a real world...