Main Page
Welcome
About the Center
About The SPC
Mission and Vision
Organizational Structure
Spc Directors
Facts and Figures
Services
ِActivities
Exhibitions
Print Exhibition
Books Exhibition
Visits
Training
Workshops
Courses
Seminars
Conventions
Celebrations
Research
Favorite Links
Contact Us
PhotoAlbum
Contact Us
Researches
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Scientific Publishing Center
Document Details
Document Type
:
Article In Journal
Document Title
:
ROD Range and the Threshold Value
مجال معلم جودة صخور وقيمة المرجع
Subject
:
Earth Sciences
Document Language
:
English
Abstract
:
The RQD is the easiest method of calculating the desingation of the rock masses for design purposes. The threshold value of lOOmm is used so far to calculate RQD, with no scientific or physical basis for choosing this value. If the RQD calculation is based on this value it could give an ambiguous evaluation of the actual RQD of the rock mass in concern, and different threshold values could lead to different RQD's. In this paper, various threshold values were chosen from lOrnm to lOOmm to calculate the effect of RQD using a written computer program utilizing Monte Carlo method. The criterion used in the assessment of threshold value is its change with the RQD range which is defined as the difference between maximum and minimum RQD values that occur during a simulation of RQD by Monte Carlo technique. The result appears as an inverse parabolic relationship between RQD range difference and the threshold value. This research recommends use of a threshold value between lOmm to 4Ornm to calculate the actual RQD of the rock mass which lead to a minimum expected error
ISSN
:
1012-8832
Journal Name
:
Earth Sciences Journal
Volume
:
5
Issue Number
:
1
Publishing Year
:
1412 AH
1992 AD
Number Of Pages
:
13
Article Type
:
Article
Added Date
:
Sunday, October 11, 2009
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
بهاءالدين هاشم صدقة
BAHAA-ELDIN H. SADAGAH
Researcher
Files
File Name
Type
Description
21578.pdf
pdf
Back To Researches Page