Verma, H.K.
(2015)
CONTROLLED BLASTING TECHNIQUES FOR DEVELOPMENTOF ROAD
INFRASTRUCTURES IN HILLY TERRAIN.
Journal of Hydro-Tech, 4 (1).
pp. 43-50.
Abstract
Blasting is a process of breaking the rock mass to excavate the ore and materials. Many open blasting operations are faced with the apparently conflicting requirements of providing large quantities of fragmented rock and of minimizing the amount of damage inflicted upon the surrounding slopes. A slope in strong hard rock is not necessarily stable, nor is a slope in weathered weak rock necessarily unstable. In some cases the reverse is true, depending on the geometry of joints and weak planes. Many slope failures in hard rock occur with no or very little warning. Detection and monitoring may not be feasible, or require sophisticated instruments and procedures that are not practical at some locations. An important element in avoiding catastrophes is to study the site geology for dangerous conditions, implement the types of blasting procedures that minimize failures, and evaluate the potential use of reinforcement or other mechanical stabilizing procedures. Apart from undesired profile of excavation, the conventional blasting damages the surrounding rock mass and structures like buildings, etc. These damages can be minimized by use of controlled blasting technique. The controlled blasting technique (CBT) is used to produce the desired stability of pit walls/slope. The CBT used for slopes is specifically termed as wall controlled blasting technique (WCBT). WCBT includes buffer blasting, trim blasting, line blasting and pre-splitting. Among these, the pre-splitting is the most commonly used technique. This technique has several advantages such as minimum damage from back-break, enhanced carrying capacity, higher structural stability and stable final pit walls or slope at the designed angle thus improving overall safety of wall/slope
| Item Type: |
Article
|
| Uncontrolled Keywords: |
Wall control blasting technique, Rock mass damage, Construction blasting vibration, Pre-splitting |
| Subjects: |
Blasting |
| Divisions: |
UNSPECIFIED |
| Depositing User: |
Mr. B. R. Panduranga
|
| Date Deposited: |
13 Jan 2020 10:24 |
| Last Modified: |
13 Jan 2020 10:24 |
| URI: |
http://cimfr.csircentral.net/id/eprint/2148 |
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