Deep Earth Logic is one of the nation’s largest blast monitoring companies. Established in 2012 and based in North Carolina, the company monitors the impact of controlled blasting specifically in quarries across the US.
Quarry operators routinely perform controlled blasting in order to replenish their supply of gravel, fill and gradient used in the construction of roads, parking lots, and even cement. Legislation requires that such blasting be monitored to protect people, property and the environment.
Quarries often outsource the blasting and ongoing blast monitoring to external firms. A seismograph is used to ensure that both ground vibration and air-over pressure (the additional pressure above normal atmospheric pressure) are within specified ranges. Seismographs typically contain two sensors – a geophone that measures ground vibration, and a microphone that measures air-over pressure.
An important activity that often accompanies blasting is public information and education. By working with local governments and citizens to educate them about the process and likely impacts, blasting can proceed without delay.
Deep Earth Logic has established close working relationships with their clients allowing them to perform an important role as an independent third party that can not only perform all monitoring remotely, but assist their clients with public relations.
Deep Earth houses an Instantel seismograph along with the Sierra Wireless airlink LS300 rugged 3G gateway provided by Premiere Partner USAT Corp located in Chapel Hill, NC and houses the equipment in a cabinet which is mounted on a monitoring location. The monitoring locations are strategically placed around the quarry. Upon an “event”, the seismograph is triggered and the microphone and geophone are activated. The results are “locked in” and automatically transmitted via the AirLink LS300 to a back-end server. The data is then analyzed and sent on to clients and/or regulators. A typical quarry could have from 1 to 6 sensor units.
Kyle Gates has been involved in the blast monitoring industry for 8 years, and in a prior company had used the AirLink Raven XT, the predecessor to the LS300. He knew it was solid, reliable technology but was coming to the end of its product life and was concerned about which technology they would migrate to for remote sensing. With consultation from Daniel Johnson of USAT Corp., he learned about the AirLink LS300 gateway, but he still had to see product deployed to be fully assured of its capabilities. “We understood the reliability that the Raven XT offered as part of the solution, and migrating to the LS300 was a learning curve but proved to be the right choice. The LS300 is equally reliable and much fast than the Raven. We were starting up our business and had to hit the ground running, so we were able to quickly configure and deploy the solution to get early sites connected.”