Rockburst is a typical rock failure which frequently threatens both human life and construction equipment during highly stressed underground excavation. Rock lithology is a control factor of rockburst. In this paper. rockburst tests were conducted on rectangular prismatic specimens of six types of intact hard brittle rocks. https://www.nacrack.com/flash-pick-Ib-Laursen-Unika-Mursteinsform-Enkel-mega-value/