Download GTU BE/B.Tech 2019 Summer 5th Sem New 2152204 Rock Mechanics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 5th Sem New 2152204 Rock Mechanics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?V (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2152204 Date: 31/05/2019

Subject Name:Rock Mechanics

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Describe the various uses of Rock Mechanics. 03
(b) Explain the engineering properties of soil. 04
(c) What are the dynamic properties of rock? Explain them. 07

Q.2 (a) List out the Mechanical properties of rocks. 03
(b) Explain swelling and anisotropy in rocks. 04
(c) Explain in-situ elastic properties of rock. 07
OR
(c) How abrasivity is determined in rock? 07

Q.3 (a) Explain types of consolidation. 03
(b) Explain Isotropic and Anisotropic Rock. 04
(c) Explain Failure of rocks. Give the types of Failure. 07
OR
Q.3 (a) Write note on Analysis of Stress. 03
(b) Write a note on Thermal Properties of Rock. 04
(c) Write a note on Triaxial compressive strength. 07

Q.4 (a) What is application of rock mechanics in mining? 03
(b) Explain ground water flow in rock mass. 04
(c) Explain Moh?s and Griffith criteria of rock failure. 07
OR
Q.4 (a) Write short note on Water influence on rock mass. 03
(b) Write note on Permeability of rocks. 04
(c) What is rheology? List out different rheology models. Explain
Kelvin model.

07
Q.5 (a) Define the following terms: (1) Permeability (2) Viscosity (3)
Elasticity.
03
(b) What are the pre-mining stress in rock mass. 04
(c) Write a note on the hydro-fracturing in rocks in pre-mining state of
stress.
07
OR

Q.5 (a) Explain the Mohr?s scale of hardness. 03
(b) Define the following terms: (1) Rock (2) Density (3) Mineral (4)
Strength.
04
(c) Define creep? Give the measurement of creep in rocks. 07



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