专利名称：A METHOD OF FRACTURING ROCK OR
SIMILAR MATERIAL
发明人：BRUCE, HOWARD D.申请号：EP91918292申请日：19911016公开号：EP0559658A4公开日：19940608
摘要：method for breaking hard compact material, such as rock or concrete,consisting of a hole drilled in advance in the area of the material to be broken.theprocess involves the introduction of a plug of solid material in the hole to the bottom ofit, and the application of an impact force on the plug is powerful enough for at least onesurface of the impact at the level of the cap to sides of the hole. in order to break thesurrounding material.
申请人：BRUCE, HOWARD D.
地址：1129 COMMODORE STREET; CLEARWATER, FL 34615
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