The blasting quality and the rock volume blasted directly affect the cost of mines. A small charge-forward blast crater experiment was conducted to study the relationships between the rock volume blasted, the explosive unit consumption, the bulk yield, and the depth ratio. The results showed that the rational resistant line or explosive charge depth should be 0. Based on theoretical analysis of the large spacing of the holes and the small resistance line, the uniform design method was used to conduct the lateral blasting crater tests. The relationship equations among the blasting parameters, the blasting volume, and the bulk yield were obtained by regression analysis. The results illustrated that the rock volume blasted was negatively correlated with the bulk yield.
Results for : suck hole teen cock explosive
Study of non-conventional fuels for explosives mixes
Study of non-conventional fuels for explosives mixes. The use of ammonium nitrate and fuel oil ANFO results in low cost blasting. Such costs may be further reduced by replacing fuel oil with alternative fuels such as biomass biodiesel, rice straw, corn cob, sugar cane bagasse and tires residue. This paper investigates the use of other fuels instead of fuel oil by measuring the detonation velocity VOD and verifying the importance of these fuels in an explosive mixture. Except for biodiesel, all the tests conducted for the mixture of ammonium nitrate and alternative fuels showed poor performance when compared with ANFO. This study indicates that the methodology proposed can be applied as a reference for determination and preparation of explosive mixtures of fuel and oxidizing agents since in all the tests conducted the detonation of the charges occurred. The importance of ANFO as an industrial explosive due to cost, safe handling and ease of use has prompted a large amount of work attempting to quantify the influence of physical properties parameters of the explosive to the detonation properties parameters of the explosion.
The COntinuous Reflectometry for Radius vs. The CORRTEX system, fielding techniques, and the methods and software for data reduction and analysis were developed over a 15 year period with hundreds of measurements made on nuclear tests and high explosive experiments. CORRTEX is a compact, portable, fast-sampling, microprocessor-controlled system, based on time domain reflectometry, requiring only a 24 volt power source and a sensing element. Only the sensing element a length of 50 ohm coaxial cable is expended during the detonation. Its utility for diagnosing chemical explosives was further demonstrated with successful measurements on large multiple-hole chemical shots in rock quarries and strip mines.
Project Plowshare was the overall United States program for the development of techniques to use nuclear explosives for peaceful construction purposes. As part of the program, 31 nuclear warheads were detonated in 27 separate tests. Successful demonstrations of non-combat uses for nuclear explosives include rock blasting , stimulation of tight gas , chemical element manufacture, [a] unlocking some of the mysteries of the R-process of stellar nucleosynthesis and probing the composition of the Earth's deep crust, creating reflection seismology vibroseis data which has helped geologists and follow-on mining company prospecting. The project's uncharacteristically large and atmospherically vented Sedan nuclear test also led geologists to determine that Barringer crater was formed as a result of a meteor impact and not from a volcanic eruption, as had earlier been assumed. This became the first crater on Earth definitely proven to be from an impact event.