Development of a Small-Scale Model for Caprock

Small scale tests were used to determine the major factors of caprock breakage relative to a single blasthole. This was done using small scale concrete blocks. The tests showed a distinct difference between the bench fragmentation adjacent the explosives, and the caprock.


Downstream Benefits of Optimized Drilling

This paper will discuss how capital investments in drill optimization technologies to provide precise pattern geometries allow the mine or quarry to expand patterns and still produce results that benefit mucking, crushing, and processing. It will also demonstrate how quickly the return on investment may be realized.


Drill and Blast Instrumentation for Troubleshooting Underground Up-Hole Stoping

The use of drill and blast instrumentation to troubleshoot problems with up hole stope blasting.


Drilling and Blasting Techniques for Sinking a Well in a Water Reservoir-A Case Study for Underwater Controlled Blasting Methodology and Monitoring

Underwater drilling and blasting is being conducted at Panchet Dam, Asansol, West Bengal, for sinking a 20m diameter well inside Panchet Reservoir with minimum standing water depth of 15m to 35m by drilling and blasting techniques.


Dutch Harbor, Alaska Unisea Quarry – Using Near Field Vibration Measurements to Improve Blasting Results Close to Structures

This is a blasting operation in a very remote place on the Aleutian Islands in the far west of Alaska. The short distance between the blast side and the camp facilities (50') represented a big challenge to avoid high vibration readings and fly rock issues. Electronic detonators were crucial.


Effect of Explosive Charge Geometry on Shockwave Propagation

The physical geometry of a charge has a direct correlation to the geometry of the shock wave. This paper will describe the methodology and findings of a series of experiments designed to examine shock wave propagation, in the near and far field, from charges of different geometries.


Exploring Rock- Explosive Interaction Through Cross Blasthole Pressure Measurements

Blasting, cross blasthole pressure, rock-explosive interaction.


Exterior Explosive Model Development and Validation for Application in Terrorism Risk Assessment

In support of a quantitative risk assessment of explosive terrorism risks to the US homeland, a probabilistic model of the human health consequences of an explosive attack in an exterior area, such as a city center, was developed and validated against both past incidents and industry accepted modeling.