Question: After grouting, a cemented fill, that has completely filled the old workings, has a Youngs modulus of 100ksi (690 MPa), and an unconfined compressive strength

After grouting, a cemented fill, that has completely filled the old workings, has a Young’s modulus of 100ksi (690 MPa), and an unconfined compressive strength of 3,400 psi (23.4 MPa), as determined from unconfined compressive strength tests. The original extraction ratio in this area is estimated to be about 40%. Assume that the old pillars deteriorate to the point where they have no support capability. Estimate the maximum subsidence that might occur in this event. Explain why this is a maximum or upper bound estimate and why the actual “settlement” would probably be less. Or is it?

Step by Step Solution

★★★★★

3.38 Rating (167 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Given Grouted fill data Co3400 psi E 100 psi R40 old pi... 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 (279).docx

120 KBs Word File

Students Have Also Explored These Related Geological Engineering Questions!

An acre planted with walnut trees is estimated to be worth $12,000 in 25 years. If you want to realize a 15 percent rate of return on your investment, how much can you afford to invest per acre?

The security market line is estimated to be k = 5% 1 110.4% - 5%2b. You are considering two stocks. The beta of A is 1.4. The firm offers a dividend yield during the year of 4 percent and a growth...

A comet has a period estimated to be about 4210 y. What is its mean distance from the sun? (4210 y was the estimated period of the comet HaleBopp, which was seen in the Northern Hemisphere in early...

I have everything except the CMatrix::Fill() function which is at the bottom of the question. I hope someone can help. You're to write a C++ program that randomly fills the entire screen with a...

You're to write a program that randomly fills the entire screen with a character, like an asterisk, with certain foreground/background colors. After you've filled the whole screen with the character,...

You're to write a C++ program that randomly fills the entire screen with a character, like an asterisk, with certain foreground/background colors. After you've filled the entire screen with the...

I need help with a C++ program. All the files are in finished state except cmatrix.cpp. Hope u can help out You're to write a C++ program that randomly fills the entire screen with a character, like...

I have everything except the CMatrix::Fill() function which is at the bottom of the question. I hope someone can help. You're to write a C++ program that randomly fills the entire screen with a...

lab 5 Write a menu-driven program to handle the flow of widgets into and out of a warehouse. The warehouse will have numerous deliveries of new widgets and orders for widgets The widgets in a filled...

Predict the products of the following reactions. (a) (b) HCI DCI (D-2H)

ZeeZees Construction Company has the opportunity to select one of four projects (A, B, C, or D) or the null (Do Nothing) alternative. Each project requires a single initial investment and has an...

Consider the situation of Case Study 9.1 on page 281 with a larger sample of metal pieces. The diameters are as follows: 1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 1.01, 1.03, 0.99, 1.00, 1.00, 0.99, 0.98,...

The table below shows annual returns on Archer Daniels Midland (ADM) and Walmart. The last column of the table shows the annual return that a portfolio invested 50% in ADM and 50% in Walmart would...

Clarita is a single taxpayer with two dependent children, ages 10 and 12. Clarita pays $3,000 in qualified child care expenses during the year. If her adjusted gross income (all from wages) for the...

Refer to the data regarding Juda Products in Exercise E26-24. Compute the IRR of each project, and use this information to identify the better investment. In Exercise 26.24 Use the NPV method to...

Explain the relationship among data mining, text mining, and sentiment analysis.

Discuss the differences and commonalities between text mining and sentiment analysis.

Consider a car trip into the mountains. Construct a problem in which you calculate the overall efficiency of the car for the trip as a ratio of kinetic and potential energy gained to fuel consumed....

Use loop analysis to find Vo in the circuit shown. 12V 2mA

Brackets, such as the one shown, are used in mooring small watercraft. Failure of such brackets is usually caused by bearing pressure of the mooring clip against the side of the hole. Our purpose...

Use loop analysis to find Io in the circuit shown. 2 nA 4mA 2 2

Show that the risk-neutral probability of a call finishing in the money is phi (d_2, (T, S_0, K, sigma, r)). Show that the risk-neutral probability of a call finishing in the money is phi (d_2, (T,...

find the mean, median and mode for one of the variables.Which of these measures of central tendency do you think is the best choice for "average" and why?Find the range and standard deviation...

how to solve the logistic model using R programming what are the code to use to produce the 1 st and 2 nd using R programming please provide the code. data is following: