Techniques of Controlled Blasting - SlideShare
Following are the techniques of controlled blasting: Line drilling, Trim (Cushion) blasting, Smooth (contour or perimeter) blasting, Pre-splitting, Selecting and employing various parameters of blast design, using modern technology, Precise and accurate timing delays, Muffle blasting at critical and congested areas. 4 5.Blasting | ontariocolleges.ca,Techniques in blast hole drilling, blast design, accident prevention and environmental protection are also part of the curriculum. In programs that focus on both drilling and blasting, students learn more specialized methods of blasting compared to those in blasting or drilling techniques programs.Underground Drilling and Blasting Training DVD - ACG - YouTube,24/10/2012· All underground mine workers will be exposed to drilling and blasting processes. The aim of this new DVD is to provide workers with the critical knowledge on drilling and blasting to aid,Blasting technique - YouTube,17/5/2018· Blasting method of ground improvement techniques. This feature is not available right now. Please try again later.Tunnel Construction Methods and their comparison – Mining,,27/7/2011· Tunnel Construction Methods and their comparison . 1. Introduction – This paper gives a general description of the tunnelling techniques such as cut and cover, drill and blast, bored tunnelling and sequential mining construction, reviewed for possible use in various projects. A summary of environmental merits and demerits associated with these methods are also given.Tunnelling methods - BBT SE,In tunnel construction, we differentiate between two excavation methods: blasting and mechanised tunnelling using tunnel boring machines (TBMs). The choice of excavation method depends on various factors – e.g. route length, nature of the rock mass, economic framework conditions and planned construction period.Blaster's Training Modules - Module 4 - Blasthole Drilling,There are two basic drilling methods—percussion and rotary—classified in accordance with the way in which mechanical energy transfers from the rig to the rock. Percussion Drilling In percussion drilling, the rock is made to fail by means of a piston that delivers rapid impacts to the drill steel, thereby transferring energy to the drill bit.Mine Shaft Sinking Methods,Conventional mine shaft sinking methods involve the performance of a cycle of different operations—drilling and blasting, removal of smoke and cleaning of fly-rock lodged on overhead timbers, mucking and hoisting of the broken rock, and timbering. The latter (a) may be the last operation of the cycle, (b) may be carried on during drilling and mucking, provided it is done from a substantial,Blast Hole Drilling: The Basic Process | RPM Drilling,Basic Blast hole Drilling Process: Step 1 – Surveying the location . Before the blast hole drilling can begin, the proposed site needs to be inspected, and certain decisions need to be made with regards to the hole size/diameter, the type of drill or drills that will be required, etc.