Study of the propagation of the shock-air wave front in the axial air cavity of a downhole charge of explosives
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- Oriental Renaissance: Innovative, educational, natural and social sciences (E)ISSN:2181-1784 www.oriens.uz
Oriental Renaissance: Innovative,
educational, natural and social sciences (E)ISSN:2181-1784 www.oriens.uz SJIF 2023 = 6.131 / ASI Factor = 1.7 3(5), May, 2023 1324 Па R S G R S G R S G Р , 10 46 , 1 2 , 9 44 5 3 / 1 3 / 2 , (2) where S is the cross-sectional area of the axial air cavity, m 2 ; for overpressure time c м R S G c R . , 10 92 , 0 3 6 (3) where c is the speed of sound, m/s. Results and discussion As a result of the theoretical studies carried out, the dependences of the propagation of the shock-air wave front in the axial air cavity of the borehole charge were established depending on the detonation velocity and explosive density. In table. 1 shows the main characteristics of explosives, determined by the authors of [13]. Table 1 BB name Density of explosives, explosives , kg / m 3 Detonation velocity, D, m/s Heat of explosion Q, kJ/kg Air shock wave speed ω, m/s adiabatic exponent, Grammonite 79/21, GOST 21988-76 800-850 3200-4000 4285 4700 - 5000 1.9 Granulite AS-4, GOST 21987-76 850-900 2600-3500 4522 3250 - 4100 1.54 Granulite AS-4V, TU 85-620-82 800-850 3000-3500 4522 3750 - 4700 1.56 Granulite AC-8, GOST 21987-76 870-950 3000-3600 5191 3750 - 4700 1.52 Granulite AS-8V, TU 84-620-82 800-850 3000-3600 5233 3750 - 4700 1.56 Granulite M, GOST 21987-76 780-820 2500-3600 3852 3200 - 2560 1.48 Granulite S-2, GOST 21987-76 800-850 2200-3000 3939 2750 - 3500 - Also, the dependences of the propagation of the front of the shock-air wave in the axial air cavity of the borehole charge on the cross-sectional area of the cavity and the mass of the explosive charge at various distances were established (Fig. 1-3). Oriental Renaissance: Innovative, educational, natural and social sciences (E)ISSN:2181-1784 www.oriens.uz SJIF 2023 = 6.131 / ASI Factor = 1.7 3(5), May, 2023 1325 Rice. 1. Dependence of the propagation of the front of the shock-air wave in the axial air cavity of the borehole charge on the cross-sectional area of the cavity Rice. 2. Dependence of the propagation of the front of the shock-air wave in the axial air cavity of the borehole charge on the mass of the explosive charge Rice. 3. Dependence of the propagation of the front of the shock-air wave in the axial air cavity of the borehole charge on the distance |
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