SU1578439A1 - Safety cartridge - Google Patents

Abstract

The invention relates to mining and can be used in blasting operations in mines hazardous to methane and coal dust. The cartridge consists of inner 1 and outer 2 shells placed in each other with a gap. The shell 1 contains a charge of 4 explosives of reduced performance. The gap between the shells is filled with a filler in the form of hydrate 8 of an extinguishing gas flame. When electric detonator 5 is triggered, charge 4 explodes, as well as scattering and decomposition of gas hydrates 8. Improvement of the safety properties occurs due to release of dispersed sodium chloride, water and large volumes of flame quenching gas, as well as absorption of thermal energy during decomposition of gas hydrates 8. 1 ill., 3 tab.

Description

Table 1 Characterization of the hydrates of certain gases

Indicator

co2

Hydrate density at 0 ° С 1.053 and hydrate formation pressure, t / m The volume of gas in one volume of water (C; 1 MPa),

m3 / m3176.1

The volume of gas in one volume of hydrate (under the same conditions), me / m3137.6 Mass of gas per unit volume of hydrate, kg / m 27.1.9 Mass of water per unit volume of hydrate, kg / m3 781.1

T

The equilibrium parameters of the carbon d hydrate (experimental data

Tdis, K Rdtss, kPa J T., K

277.72040 282.3 279.12580 282.3

280.83220

T

The gas pressure in the decomposition of a gi closed volume at different (calculated data) is given in

Temperature, 6C 50 75 Pressure, MPa 140 270

Gas

co2

Claims (1)

Claim A safety cartridge, consisting of inner and outer shells, placed one in the other with a gap, with an explosive charge of reduced efficiency being placed in the inner shell, a filler in the gap between the shells, characterized in that, in order to increase the safety properties and expand the area the application of the cartridge, the inter-shell space is filled with hydrate of flame-extinguishing gas. Table 1 Characterization of hydrates of certain gases Gas indicator I r ί 1 1 η 1: _x o ι. ** .1 I 1 1 1 1 1 1 | Argon The density of the hydrate at 0 ° C and the pressure of hydrate formation, t / m ³ The volume of gas in one volume 1,053 1,200 water (T = 0 C; P = 0.1 MPa). m ³ / m ³ 176.1 300 The volume of gas in one volume hydrate (under the same conditions), m ^e / m ³ 137.6 223 The mass of gas in a unit volume of hydrate, kg / m ³ 27.1.9 412 Mass of water per unit volume of hydrate, kg / m ³ 781.1 788 table 2 The equilibrium parameters of carbon dioxide hydrate (experimental data) Tdns, K | Rdns, kPa to Rdis, kPa 277.7 2040 282.3 3690 279.1 2580 282.3 4290 280.8 3220 Table 3 The gas pressure during the decomposition of CO ^ hydrate in a closed volume at different temperatures (calculated data) are given in table. 3. ti Temperature, C 50 75 95 Pressure, MPa 140,270 400 Compiled by A. Paradise Editor L. Pcholinskaya Tehred A. Kravchuk Proofreader T. Malets Order 1904 Circulation 386 Subscription VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology 1 13035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and Publishing Plant "Patent", Uzhhorod, st. Gagarina, 101