blasting fragmentation and how blasting effects loading and hauling

Downstream Impacts of Drilling and Blasting

Impacts of Drilling and Blasting Drilling and Blasting is a complex process, that in many situations is not given the full emphasis it deserves in process development and controlling the costs throughout the mine. For example, the blasting process dictates muckpile configuration which effects shovel and loader fill factors. The fill factor of the shovel […]

Quarry and Open Pit Mine

Geologic Problems that Influence Blast Floors

Toe and Elevated Floor Problems The problem of toes and elevated floors after a blast can be traced back centuries to when explosive were first used in mining. Why do they occur? What is commonly blamed as the cause of these toes is geology, but how does geology change that rapidly to where one shot […]

Blast Burden and Ground Vibration

How does you blasting burden influence your ground vibration? The burden of a blast is defined as the nearest relief to the borehole at the time that it fires. This can be either through a free face that the borehole was drilled near or a newly created face that was made from previous blastholes firing. […]

Stemming Charges to Break Boulders

Using Stemming Charges to Break Cap Rock

Stemming is widely used to ensure loaded boreholes achieve optimum blast results, but can this stemming be creating boulders in your blast? The utilization of stemming is now commonplace in mine and construction blasting projects as it leads to large decreases in air overpressure and ground vibration and increases to fragmentation and muckpile control. Oftentimes […]

Blast Stemming Blow Out Reduces Efficiency

Improving Explosive Efficiency with Proper Stemming

The use of proper stemming for decreasing noise and increasing fragmentation in blasting.   Stemming is a material that is poured into a borehole after the explosive has been loaded in order to confine gas pressure. Many blasters acknowledge that stemming can reduce air overpressure, often cutting it over 98% compared to an unstemmed borehole. […]

Six Sigma Drilling and Blasting

Six Sigma Drilling and Blasting

Drilling and Blasting is a complex process involving heavy machinery, structural geology, engineering designs, and thousands of pounds of explosives. This process is specifically designed to optimize the fragmentation while minimizing the cost and environmental factors. Often times mines begin this process and call in consultants to assist in the optimization, however the design is […]

Stemming for blast holes

Stemming

Stemming Calculations Stemming In this video Anthony Konya of KonyaInc.com explains stemming and stemming calculations. Stemming is a material that is put inside of a blast hole to help prevent gases from escaping. While stemming is typically put in the top of a blast hole, it can also be used to help bridge mud seams […]

Spacing example

Spacing with Delayed Holes

Spacing with Delayed Holes Spacing In this video Anthony Konya explains how to calculate spacing with delayed holes. Incorrect spacing can make blast vibration increase up to 500%! This happens in ground vibration when to much spacing is included in the blast pattern, as the hole will feel constrained and not break the rock effectively. […]

Blasting Course Stiffness Ratio

Stiffness Ratio

Stiffness Ratio Stiffness Ratio In this short video, Anthony Konya will explain what stiffness ratio is and how to calculate stiffness ratios. Stiffness Ratio was first developed by Dr. Calvin Konya as a means to classify benches. As time went on Dr. Konya discovered a unique relationship, that benches were not only dependent on the […]

Subdrill

Subdrill

Subdrilling to optimal levels! Subdrilling Calculations Subdrilling Subdrilling is the process of drilling below the desired floor in blasting in order to form a smooth floor at correct level. If your subdrill is not low enough the floor may be uneven, or leave a large toe. If your subdrill is to large then you lose valuable time and […]