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(d) Design an underground rectangular tunnel drift, in a massive granitic rock with a UCS over 100 MPa, of width: 3.1 m, height: 4.1 m, and length 10 m, using an initial Burn-Cut method to create an extra surface for the next underground Bench-Blasting operation, where the idea is roughly illustrated in Figure A3-Q2. : VIII VII VIII VIII IV . IV VII IV IV Development leading Salad care andy VII Brech Blast hader 2 VII . VIII VII VII VII VIII Firing sequence for tunnel numerical order 1 Dorsegment healing Seldcre body Burn cut (after ICI) Arabic numerals: short delay periods Roasan nunerals: half-second periods xy-section view Derech Eros Batt holes Bench blasting methods (yz section view) Figure A3-Q2. Idea of new free surface creation in underground drifts and tunnels

(d) Design an underground rectangular tunnel drift, in a massive granitic rock with a UCS over 100 MPa, of width: 3.1 m, height: 4.1 m, and length 10 m, using an initial Burn-Cut method to create an extra surface for the next underground Bench-Blasting operation, where the idea is roughly illustrated in Figure A3-Q2. : VIII VII VIII VIII IV . IV VII IV IV Development leading Salad care andy VII Brech Blast hader 2 VII . VIII VII VII VII VIII Firing sequence for tunnel numerical order 1 Dorsegment healing Seldcre body Burn cut (after ICI) Arabic numerals: short delay periods Roasan nunerals: half-second periods xy-section view Derech Eros Batt holes Bench blasting methods (yz section view) Figure A3-Q2. Idea of new free surface creation in underground drifts and tunnels

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.12P
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(d-i) Sketch/draw, with correct scales, your tunnel excavation problem showing all the xy, yz and xz section views together with your staged drilled blast holes. (d-ii) Design your burn-cut and show your design schematically with all the firing charge and detonation time delay details.
(d) Design an underground rectangular tunnel drift, in a massive granitic rock with a UCS over 100 MPa, of width: 3.1 m, height: 4.1 m, and length 10 m, using an initial Burn-Cut method to create an extra surface for the next underground Bench-Blasting operation, where the idea is roughly illustrated in Figure A3-Q2. : VIII VII VIII VIII IV . IV VII IV IV Development leading Salad care andy VII Brech Blast hader 2 VII . VIII VII VII VII VIII Firing sequence for tunnel numerical order 1 Dorsegment healing Seldcre body Burn cut (after ICI) Arabic numerals: short delay periods Roasan nunerals: half-second periods xy-section view Derech Eros Batt holes Bench blasting methods (yz section view) Figure A3-Q2. Idea of new free surface creation in underground drifts and tunnels
Transcribed Image Text:(d) Design an underground rectangular tunnel drift, in a massive granitic rock with a UCS over 100 MPa, of width: 3.1 m, height: 4.1 m, and length 10 m, using an initial Burn-Cut method to create an extra surface for the next underground Bench-Blasting operation, where the idea is roughly illustrated in Figure A3-Q2. : VIII VII VIII VIII IV . IV VII IV IV Development leading Salad care andy VII Brech Blast hader 2 VII . VIII VII VII VII VIII Firing sequence for tunnel numerical order 1 Dorsegment healing Seldcre body Burn cut (after ICI) Arabic numerals: short delay periods Roasan nunerals: half-second periods xy-section view Derech Eros Batt holes Bench blasting methods (yz section view) Figure A3-Q2. Idea of new free surface creation in underground drifts and tunnels
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