1. At what depth do you encounter fresh rock (unweathered)? 2. From 5.8m to 7.5m depth, what is the Rock Quality Designation (RQD), given a 1 m length of core box for each partition? 3. How many discontinuity sets are there between 5.8 and 7.5 meters of depth? Estimate the dip angle of each discontinuity set. Note: RQD is calculated by dividing the total length of drill run core pieces longer than 10 cm by that length.
1. At what depth do you encounter fresh rock (unweathered)? 2. From 5.8m to 7.5m depth, what is the Rock Quality Designation (RQD), given a 1 m length of core box for each partition? 3. How many discontinuity sets are there between 5.8 and 7.5 meters of depth? Estimate the dip angle of each discontinuity set. Note: RQD is calculated by dividing the total length of drill run core pieces longer than 10 cm by that length.
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
Related questions
Question
Rockmass Identification and Characterization. The image below shows rock cores acquired through drilling; answer the following questions briefly.
1. At what depth do you encounter fresh rock (unweathered)?
2. From 5.8m to 7.5m depth, what is the Rock Quality Designation (RQD), given a 1 m length of core box for each partition?
3. How many discontinuity sets are there between 5.8 and 7.5 meters of depth? Estimate the dip angle of each discontinuity set. Note: RQD is calculated by dividing the total length of drill run core pieces longer than 10 cm by that length.
8. What is the rock's name and type?
9. Soil is _____ rock.
10. What is the soil's thickness?
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