Controlled blasting techniques pdf

Measures to control silica dust generated by abrasive blasting include using a blasting medium which does not contain silica, and ensuring the process is isolated or appropriate administrative strategies are implemented. Blasting of concrete and masonry will produce silica dust. However, controlling blasting damage starts long before the introduction of pre-splitting or smooth blasting. Figure 5: Results achieved using well designed and carefully controlled blasting in a 19 foot diameter tunnel in gneiss in the Victoria hydroelectric project in Sri Lanka. This paper tells the story of using controlled surface and underground blasting methods to excavate hard rock in three areas on Australia's largest road Finally, the blasting contractor used underground development blasting techniques to remove the rock and breakthrough into the open construction site. Chapter 8 - blast vibration control. 8.1 personnel. 8.2 permissible vibration levels. A number of techniques have been developed using vibration readings, together with the distance and orientation of the monitoring point relative to the blast for further analysis to gain an Share & Embed "1. Controlled Blasting Techniques-2011". Please copy and paste this embed script to where you want to embed. Download "1. Controlled Blasting Techniques-2011". We are a sharing community. So please help us by uploading 1 new document or like us to download Although a traditional technique, significant improvements are identified along the course of the investigation. A method for analysis of rock masses, with particular attention to systems of discontinuities, has been cast, so that planning of quarrying works is made in a sound and systematic Controlled Blasting Techniques. Explosives and Blasting in Opencast. Signature Hole Blast Vibration Control. BLASTING_TECHNIQUES_IN_UNDERGROUND_METAL_MINES.pdf. The two-semester Blasting Techniques Ontario College Certificate is the only program of its kind in Canada. Blasters are employed by mining, quarrying, and construction, and drilling and blasting companies, as well as in the special effects industry. of a Successful Spanish Railway Tunnel Construction Controlled Blast Design..50 Discussion Perimeter control blasting is commonly applied to the roof but increasingly it is being applied to the walls as well. Damage was measured using various techniques including: (1) wire sawing to Chapter 11 SPECIALIZED. BLASTING TECHNIQUES. Directional control of air-blast and fragments can be achieved by designing a weak wall or roof (usually by The blaster-in-charge must have all EBW detonators and the control unit under personal control during all blasting operations. 1. Controlled Blasting Techniques-2011 - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) (PDF) rock blasting for mining -. Controlled blasting is a technique of blasting for the purpose to reduce the am ount of over break and . to control the ground vibrations. 1. TECHNIQUES OF CONTROLLED BLASTING TO IMPROVE OVERALL ENVIRONMENTAL & SAFETY STANDARD *** MEANS TO MITIGATE ADVERSE IMPACT OF BLASTING IN OPEN PITS, QUARRIES, TUNNELS, UG METAL MINES AND CONSTRUCTION WORKINGS Partha Das Sharma 1. TECHNIQUES OF CONTROLLED BLASTING TO IMPROVE OVERALL ENVIRONMENTAL & SAFETY STANDARD *** MEANS TO MITIGATE ADVERSE IMPACT OF BLASTING IN OPEN PITS, QUARRIES, TUNNELS, UG METAL MINES AND CONSTRUCTION WORKINGS Partha Das Sharma 1.TECHNIQUES OF CONTROLLED BLASTING TO IMPROVE OVERALL ENVIRONMENTAL &SAFETY STANDARD *** MEANS TO MITIGATE ADVERSE IMPACT OFBLASTING IN OPEN PITS, QUARRIES, TUNNELS, UG METAL MINES AND CONSTRUCTIONWORKINGS Partha Das Sharma In this paper, the main techniques adopted to control the rock removal process (consti-tuting a real shaping of rock, in the case of sculptures) are reviewed. Presplitting, smooth blasting, and mechanical cutting are rstly presented from a theoretical point of view. Secondly, concrete applications of these