Sibirit PSM-7500™ explosives are intended for open-pit mining application in all mining and geological conditions and climatic regions of the Russian Federation as borehole charges for boreholes with any degree of water presence, including application to the rocks and ores containing sulfides, whereas:
if pyrite content does not exceed 30%, and the acidity (pH) of the borehole water is no less than 4.0 there should be applied Sibirit PSM-7500™ of G and M grades:
if pyrite content exceeds 30% and the acidity (pH) of the borehole water is less than 4.0, modified compositions of Sibirit PSM-7500™ of G(s) and M(s) grades should be applied:
- cartridge diameter - 90 mm, charge weight - 3.7-4.8 kg;
- cartridge diameter - 120 mm, charge weight -7.0-8.3 kg;
- cover - high-strength five layer polyamide (or other polymeric material) film.
Minimum blasthole diameter - 120 mm.
The product will perform in temperatures ( free-air temperature) from -50oС to +40oС. Sleeping time of emulsion explosive Sibirit PSM-7500™ grades G and M - no more than 7days.
Sleeping time of emulsion explosive Sibirit PSM-7500™ modified grades G(s) and M(s) is defined by the application instruction developed for the specific mining and geological conditions with account of the Guidance on preventing self-induced ignitions and explosions of ammonium nitrate explosives at carrying out blasting works in copper sulfide ores.
Boreholes depth - up to 65 m
|
Properties |
Data |
|
|---|---|---|
| Calculated | ||
| The heat of explosion MJ/kg (kcal/kg) | 3,10 (740) | |
| TNT equivalent | 0,85-0,90 | |
| Volume of explosive gases,L/kg | 1020 | |
| Toxic fumes volume (CO), L/kg | 48 | |
| Oxygen balance,% | Minus 3.1 | |
| Experimental | ||
| Impact sensitivity as per GOST 4545-88:- lower limit | Above 500 | |
| Friction sensitivity (under the load of 15 kg) | Do not initiate | |
| Critical detonation diameter in polymeric tube, mm | 50 | |
| Recommended initiation charge | Primers T-400G, TGP-600, TGP-850, TGF-850, cartridges PNP-A6ZhV or boosters of analogous type, also Sibirit P™ cartridges with electric detonators, a detonating cord or non-electric wave initiating systems of SINV, Edelin types and their analogues, allowed for use by Russian Service for Ecological, Technological and Nuclear Supervision. | |
| Velocity of detonation in 90 mm cartridge, km/s Velocity of detonation in 120 mm cartridge, km/s |
no less 4.3 no less 4.5 |
|