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首页> 美国政府科技报告 >Expanded rock blast modeling capabilities of DMC( )BLAST, including buffer blasting
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Expanded rock blast modeling capabilities of DMC( )BLAST, including buffer blasting

机译：扩展了DmC（）BLasT的岩石爆破建模能力，包括缓冲爆破

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A discrete element computer program named DMC( )BLAST (Distinct Motion Code) has been under development since 1987 for modeling rock blasting. This program employs explicit time integration and uses spherical or cylindrical elements that are represented as circles in 2-D. DMC( )BLAST calculations compare favorably with data from actual bench blasts. The blast modeling capabilities of DMC( )BLAST have been expanded to include independently dipping geologic layers, top surface, bottom surface and pit floor. The pit can also now be defined using coordinates based on the toe of the bench. A method for modeling decked explosives has been developed which allows accurate treatment of the inert materials (stemming) in the explosive column and approximate treatment of different explosives in the same blasthole. A DMC( )BLAST user can specify decking through a specific geologic layer with either inert material or a different explosive. Another new feature of DMC( )BLAST is specification of an uplift angle which is the angle between the normal to the blasthole and a vector defining the direction of explosive loading on particles adjacent to the blasthole. A buffer (choke) blast capability has been added for situations where previously blasted material is adjacent to the free face of the bench preventing any significant lateral motion during the blast.

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