Innovative Online Technology Enabling Optimization in Blasting Operations

Intelligent planning and on-going analytics are required to mitigate variability and convert blasting into a predictable outcome by use of technology. Details of a software tool that utilizes historical site-specific blast data to suggest appropriate changes and optimize blast designs on an on-going basis including a case study.

 

Investigation of Shock Propagation in Air from Sheet Explosive

The geometry of an explosive is known to have a fundamental effect on the resulting shock propagation. The goal of this research is to understand the overpressure characteristics from a sheet explosive, a geometry often utilized for breeching in the military.


Investigation of the Effects of Ground Engineering Parameters on Blast-Induced Vibrations

In this study, the variation of explosion-induced vibrations according to engineering parameters was investigated in subway construction. Uniaxial compressive strength (UCS), rock quality designation (RQD) and young module were used as engineering properties. Vibration values and engineering parameters were investigated by statistical methods.


Large Scale Measurement of Velocity of Detonation

This paper examines the application of novel measurement techniques to evaluate explosive performance across the whole blast. The approach has the potential to provide VOD and timing information across a complete blast rather than individual holes. Field examples are shared.

 

Risk Management in Blasting: Lessons Learned the Hard Way

Learning from past mistakes or accidents in blasting operations is much preferable to the alternative. This paper reviews past mistakes in safety and risk management that created serious repercussions for the involved parties, and recommends methods and protocols to manage the risks involved.

 

Logistical Processes in the Explosives Industry using Examples from Daily Work

Special requirements for logistics in the explosives industry. Presentation of the efficiency, security and productivity-enhancing effects based on three practical examples out of the daily work.

 

 

Methane-Air Mixture Air-Blast Approximated Using Detonating Cord in Rock Dust Dispersibility Studies

Two curtains of PETN detonating cord with 27 and 24 m, or 43 and 27 m, or 55 and 37 m generate air-blasts in 40 tests, which show consistent wind-speeds of 33 to 52 m/s and similar duration to methane-air mixtures igniting.

Mitigating Post Blast Fume Using Density Modified Explosives

The efficacy of a variable density augered bulk product is presented, with specific reference to mitigating post blast fume. The density of the water resistant product ranges from 0.85 - 1.2 and can be matched to the dry product density which is discussed.


VOD and Initiation Effects on Blast Vibration PPV Using Nonlinear Charge Weight Scaling and Variable Time-Window for Charge Elements

A blast vibration model simulates effects of blast design parameters on the vibration peak particle velocity (PPV) from multiple blastholes at a given point of interest in the rock. The VoD initiation points, explosive type, charge decoupling and decking in each blasthole are simulated along with other design parameters.