HOLLOW CHARGE Russian patent published in 1997 - IPC

FIELD: crushing of large-size pieces of rock in open and under-ground operations. SUBSTANCE: charge of explosive 1 is put into shell 2. Cone-shaped hollow recess 3 is page in the form of central mated V members 4 and additional planes 10. Additional planes intercross to form peripheral V-shaped recesses 11 and cross base of charge 18 forming polygon 14. Its internal vertexes 15 are connected to vertex of recess 3 by means of ribs 6 of central V members and its external vertexes - by means of broken lines which links are ribs 9 of additional recesses and line 7 of mating of central V members 4. EFFECT: enhanced operational efficiency of hollow charge. 3 dwg