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Fundamental and applied issues of mining

2019 year, number 2

ESTIMATION OF ALLOWABLE DYNAMIC LOADS AT LOCATIONS OF BURIED HIGH-PRESSURE GAS PIPELINES WITH RESPECT TO BLASTING OPERATIONS IN OPEN PIT MINES

V. A. Kutuev, S. N. Zharikov
Institute of mining, Ural branch, Russian Academy of Sciences, Yekaterinburg, Russia
Keywords: Сейсмическое действие взрыва, сейсмоустойчивость, взрывные работы, разрушение горных пород, физико-механические свойства горных пород, газопровод высокого давления, безопасные расстояния, Seismic effect of blasting, seismic resistance, blasting operations, destruction of rocks, physical and mechanical properties of rocks, high pressure gas pipeline, safe distances

Abstract

Results of the study of allowable dynamic load at the location of category II buried high-pressure gas pipeline within the bounds of the mining property, in connection with blasting operations at the quarry of “Sukholozhsktsement” Company are presented. A calculation technique for estimating distances from the technological blast in opencast mine to the gas pipeline facility depending on the mass of explosives at delay stages, on the soil condition coefficient and ground velocity of vibration rate is proposed. We found that it is possible to completely eliminate the negative impact from explosion on the gas pipeline facility by changing mass of explosive in delay stages. A calculation scheme is also proposed to determine safe distances to the high-pressure gas pipeline based on the bench face angle and depth of blasting works in open pit mine.