BSU Bulletin. Mathematics, Informatics
Bibliographic description:
, , , ENVIRONMENTAL SAFETY DURING EXPLOSION OF PRESSURE CHARGES // BSU Bulletin. Mathematics, Informatics. - 2020. №4. . - С. 40-50.
Title:
ENVIRONMENTAL SAFETY DURING EXPLOSION OF PRESSURE CHARGES
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Annotation:
Explosive crushing of over-sized blocks always creates environmental
stress. The article presents the assessment of the air-blast during the explosion of pressure charges. We have calculated the air-blast parameters during the explosion of open
charges with the parameters close to the used in slap-dab at ballast quarries, and assessed the impact of various factors on the air-blast formed during the crushing of
over-sized blocks.
Comparison of the value of overpressure at the shock front with the value of permissible exposure level shows that the use of short-delayed blasting does not always
ensure the safety of the explosion in terms of the air-blast. It is established that the
minimum value corresponds to the direction along the row of charges against propagation axis of detonation and is achieved with separate airblast arrival from each group of
charges.
stress. The article presents the assessment of the air-blast during the explosion of pressure charges. We have calculated the air-blast parameters during the explosion of open
charges with the parameters close to the used in slap-dab at ballast quarries, and assessed the impact of various factors on the air-blast formed during the crushing of
over-sized blocks.
Comparison of the value of overpressure at the shock front with the value of permissible exposure level shows that the use of short-delayed blasting does not always
ensure the safety of the explosion in terms of the air-blast. It is established that the
minimum value corresponds to the direction along the row of charges against propagation axis of detonation and is achieved with separate airblast arrival from each group of
charges.
Keywords:
explosion; blasting work; pressure charges; over-sized blocks; environmental safety; air-blast; short-delayed blasting; overpressure.
List of references:
1. Makaryev V. P., Vasilyev O. G. Optimalnoe droblenie gornoi massy na shchebenochnykh karerakh [Optimal Crushing of Rock Mass in Ballast Quarries]. Zapiski LGI. Vol. 125. 1991. Pp. 62–65.
2. Egorov M. G., Mikhailov V. A., Noskov V. A. Vozdeistvie udarnoi vozdushnoi volny na sooruzhenie pri vzryve [Impact of an Air-Blast on a Construction during an Explosion]. Gornoe delo v Arktike — Mining in the Arctic. Proc. III International Symposium. St. Petersburg, 1994. P. 68.
3. Ayurzanain B. A. Issledovanie i razrabotka metodov opredeleniya bezopasnykh rasstoyanii po deistviyu udarnaya vozdushnaya volna pri proizvodstve massovykh vzryvov na karerakh: avtoreferat dissertatsii na soiskanie stepeni kandidata tekhnicheskikh nauk [Research and Development of Methods for Determining Safe Distances during Massive Explosions in Open Pits. Abstract of Cand. Engineering Diss.]. Leningrad, 1979. 23 p.
4. Egorov M. G. Raschet parametrov udarnoi vozdushnoi volny pri korotkozamedlennom vzryvanii [Calculation of the Parameters of a Shock Wave during ShortDelayed Blasting]. Problemy teorii proektirovaniya karyerov. St. Petersburg: Saint Petersburg Mining University Publ., 1995. Pp. 96–103.
5. Tsikulin M. A. O dogone odnogo treugolnogo profilya drugim v asimptotike udarnykh voln [On Slewing of One Triangular Profile by Another in the Asymptotics of Shock Waves]. Zhurnal prikladnoi mekhaniki i tekhnicheskoi fiziki. 1960. No. 2. Pp. 12–16.
6. Smith P. D., Mays G. C., Rose T. A., Teo K. G., and B. J. Roberts. Small Scale Models of Complex Geometry for Blast Overpressure Assessment. International Journal of Impact Engineering. Vol. 12, no. 3. 1992. Pp. 345–360
2. Egorov M. G., Mikhailov V. A., Noskov V. A. Vozdeistvie udarnoi vozdushnoi volny na sooruzhenie pri vzryve [Impact of an Air-Blast on a Construction during an Explosion]. Gornoe delo v Arktike — Mining in the Arctic. Proc. III International Symposium. St. Petersburg, 1994. P. 68.
3. Ayurzanain B. A. Issledovanie i razrabotka metodov opredeleniya bezopasnykh rasstoyanii po deistviyu udarnaya vozdushnaya volna pri proizvodstve massovykh vzryvov na karerakh: avtoreferat dissertatsii na soiskanie stepeni kandidata tekhnicheskikh nauk [Research and Development of Methods for Determining Safe Distances during Massive Explosions in Open Pits. Abstract of Cand. Engineering Diss.]. Leningrad, 1979. 23 p.
4. Egorov M. G. Raschet parametrov udarnoi vozdushnoi volny pri korotkozamedlennom vzryvanii [Calculation of the Parameters of a Shock Wave during ShortDelayed Blasting]. Problemy teorii proektirovaniya karyerov. St. Petersburg: Saint Petersburg Mining University Publ., 1995. Pp. 96–103.
5. Tsikulin M. A. O dogone odnogo treugolnogo profilya drugim v asimptotike udarnykh voln [On Slewing of One Triangular Profile by Another in the Asymptotics of Shock Waves]. Zhurnal prikladnoi mekhaniki i tekhnicheskoi fiziki. 1960. No. 2. Pp. 12–16.
6. Smith P. D., Mays G. C., Rose T. A., Teo K. G., and B. J. Roberts. Small Scale Models of Complex Geometry for Blast Overpressure Assessment. International Journal of Impact Engineering. Vol. 12, no. 3. 1992. Pp. 345–360
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