公开(公告)号：US3601448A

公开(公告)日：1971-08-24

申请号：US3601448D

申请日：1969-04-21

申请人： GAS DEV CORP

发明人： STONE STANFORD C

IPC分类号： E01C23/12 ,  E21C37/18 ,  E21C37/20 ,  H05B6/80 ,  E01C23/09

CPC分类号： E21C37/20 ,  E01C23/12 ,  E21C37/18 ,  H05B6/80

摘要： A low-noise method and apparatus for fracturing concrete and other solid materials by coupling microwave energy into the material in a fashion such as to generate independent heat patterns using at least two or more microwave applicator horns that are spaced apart from each other. The power density of the microwave energy coupled into the solid material is established and maintained below a predetermined threshold level above which violent and explosive type reactions occur. The spaced heat patterns or zones produced cause the heated material to expand, so as to place high tensile forces or stresses on the unheated material between the heat patterns. These forces or stresses cause failure to occur between the heat patterns, and ultimately across the heat patterns themselves.