4 Teles or thg minerals withker than theirline limestonewill not qualifyNow strength.ceous dolo-ENGINEERING PROPERTIES OF ROCKSstate, 259 gwhen satu-cificpecifictate?re-nstrongestionstructure, typdiabase. This is why diabase is one of the srocks in nature (> 275 MPa or 40,000 psi).(160and psi)? Assume a unit weight of 2.56 Mg/m³ (lb/ft3) for the rock.stressb. At this confining pressure, what horizontal swould be required to cause a shear failure in therock? Which is o, and which o3? Use the plot cstructed in Exercise 2 to obtain the answer. What isthe shear stress on the failure plane?strength4. a. Under what conditions would the tensileof rock be significant? (Consider bending conditions for a rock mass.)b. A sample of clastic limestone yielded a compres-sive strength of 41.4 MPa (6000 psi) and a shearstrength of 7.6 MPa (1100 psi). What tensilestrength value would you select for this rock if testing was not possible? Explain how you would arriveat this value.Ex5. A core sample of basalt, 10.2 cm (4 in) long and 5.1cm (2 in) in diameter, was tested in unconfined compression. The basalt is known to have a modulus ofelasticity = 6.28 x 10 MPa (9.1 x 10 psi).a. At a pressu

Answered: 4. a. Under what conditions would the…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Related questions

Question

Tel
es or th
g minerals with
ker than their
line limestone
will not qualify
Now strength.
ceous dolo-
ENGINEERING PROPERTIES OF ROCKS
state, 259 g
when satu-
cific
pecific
tate?
re-
n
stronges
tion
structure, typ
diabase. This is why diabase is one of the s
rocks in nature (> 275 MPa or 40,000 psi).
(160
and psi)? Assume a unit weight of 2.56 Mg/m³ (
lb/ft3) for the rock.
stress
b. At this confining pressure, what horizontal s
would be required to cause a shear failure in the
rock? Which is o, and which o3? Use the plot c
structed in Exercise 2 to obtain the answer. What is
the shear stress on the failure plane?
strength
4. a. Under what conditions would the tensile
of rock be significant? (Consider bending condi
tions for a rock mass.)
b. A sample of clastic limestone yielded a compres-
sive strength of 41.4 MPa (6000 psi) and a shear
strength of 7.6 MPa (1100 psi). What tensile
strength value would you select for this rock if test
ing was not possible? Explain how you would arrive
at this value.
Ex
5. A core sample of basalt, 10.2 cm (4 in) long and 5.1
cm (2 in) in diameter, was tested in unconfined com
pression. The basalt is known to have a modulus of
elasticity = 6.28 x 10 MPa (9.1 x 10 psi).
a. At a pressu

Expert Solution

Step 1

4. a. Tensile strength of a rock can be significant under conditions when a rock is exposed to high bending pressure. Under such high bending pressure conditions, the tensile strength of the rock becomes significant as the rock is required to hold its strength in order to resist itself from breaking or rupturing.