Gontar P. Mechanical rocks destruction technology improving using cumulative explosive warhead

The dissertation is dedicated to developing new energy-efficient explosive-mechanical method of rock destruction with cumulative explosive warhead usage. Specific power consumption decreasing of explosive-mechanical rock destruction due to addition natural fractures with technological one was chosen as optimization objective. The mathematical model of energy consumption of rock destruction, which includes parameters of explosive-mechanical stressing and complex of natural and technological fractures influence, was developed. Experimentally investigated decreasing of rocks’ elastic properties with cumulative explosion warhead influence frequency increasing (0…24 explosions per minute). Namely: ultrasonic waves speed was decreased on 2…8 %; Young’s modulus – on 28…37 %. The full-size experimental device for combined explosive-mechanical rock destruction method with cumulative explosive warhead implementation was created. The device allowed to determine decreasing of rock destruction specific energy consumption from cumulative explosion warhead stressing frequency (on 9…16 %) and temperature of explosion (on 4…7 %).