Pittsburgh, PA30+ days ago
With more than 65 years of business and technical expertise in mining (https://www.hatch.com/Projects/Metals-And-Minerals) ,energy (https://www.hatch.com/Projects/Energy) , andinfrastructure (http://bit.ly/HatchProjectsInfrastructure) , our10,000 colleagues (http://bit.ly/3l3V1N3) in150 countries (https://bit.ly/2TTgBIl) tirelessly work toward bettering the industries in which we operate. + Drill & blast tunnelling and shaft construction techniques and controlled blasting design, including burn cut and charged hole pattern design, delay timing, explosives and detonator product, charging procedures, and explosive charge weight calculations.