Sibirit-2500 RZ™ - commercial explosive of class 1 (classification OST 84-2158-84), representing a blend of emulsion explosive - Sibirit-1200™ (Specifications 727680000-010-05608605-99) with granulite NP (Specifications 727680-001-00173901-94) or with granulite UP (Specifications 7276-064-00173769-03) or with granulite-igdanite (Specifications 7276-01-04683349-96).
Sibirit-2500 RZ™ is produced during simultaneous separate mechanized above ground charging of the borehole by Sibirit-1200™ and granulite NP or UP or igdanite and is intended for blasting dry boreholes or boreholes containing little water (height of water column - 3-4 m), including applying to the rock and ores containing sulfides, if pyrite content does not exceed 30% and the acidity (pH) of the borehole water is no less than 4.0 in all climatic regions of Russia.
Minimum blasthole diameter - 150 mm. Recommended depth of the borehole - up to 35-40 m. Sleep time - no less than 3-7 days (depending on whether high density or porous ammonium nitrate was used at producing granulite NP or UP).
Sample of identifying the product in the order and in technical documents:
Sibirit-2500 RZ™ (Specifications 727680-011-05608605-2000), where 2500 defines the weight ratio of the components, Sibirit-1200™ to granulite NP, UP or igdanite, which equals 25/75; RZ index indicates that explosive composition is developed during simultaneous separate charging (abbreviated from Russian) of the borehole from two mix-charging trucks.
The requirements of the present technical conditions are mandatory.
Main physical-chemical and blasting properties of Sibirit-2500RZ™ are given in the Table below.
|
Properties |
Technical Data |
|---|---|
|
Calculated: The heat of explosion MJ/kg (kcal/kg) |
3,57(852) |
|
Specific volume of explosive gases,L/kg, including toxic, L/kg |
992 19,2 |
|
Oxygen balance,% |
-1,3 |
|
Experimental: Impact sensitivity as per GOST 4545-88: - lower limit, mm |
|
|
Friction sensitivity (under the load of 15 kg) |
Do not initiate |
|
Heat sensitivity (DTA method) |
Show no exothermic decomposition up to 170oC, intensive exothermic decomposition at 240-260oC. |
|
Remain chemically stable at 75оС during 48 hours |
Show no decomposition |
|
Critical detonation diameter in steel tube, mm |
no less than 75 |
|
Velocity of detonation in 100 mm diameter steel wrap, km/s |
4,0-4,5 |
|
TNT equivalent |
1,0-1,1 |
|
Recommended initiation charge |
T-400G or other |
|
Specific electrical volume resistivity Ohm*m |
90 |
|
Minimum ignition energy, J |
Above 1 |