METHOD OF EXPLOSIVE TRANSFORMATION PARAMETER DETERMINATION Russian patent published in 2017 - IPC G01N33/22 G01N25/54 

FIELD: blasting.

SUBSTANCE: invention relates to the explosive reactivity scope by the action of thermal means, in particular, determination of the time before the onset of a self-sustaining reaction and can be used to determine the critical conditions for the occurrence of explosives thermal explosion by direct experimental way and the verification of adequate kinetic models of thermal explosive decomposition. In the method of explosive transformation parameter determination carried out under thermal conditions for the investigated samples of explosives in a reaction chamber that is connected to measuring devices that generate measuring signals and to devices that convert and process measurement signals by recording measurement signals, plotting the graphical dependences of the measured in on-line mode parameters, and evaluation of the conditions for the occurrence of explosive transformations, the thermal effect on the investigated explosive is carried out with heating with a speed of not more than 0.7°C/min, the plotting of graphical dependencies is performed on the basis of the recorded signals characterizing the temperature at all characteristic points of the surface and inside the investigated cylindrical explosive sample of an arbitrary kind and characterizing the pressure of the gaseous medium inside the reaction chamber, and estimating the conditions for the occurrence of explosive transformations are performed visually according to the run of the noted curves behavior of the graphical dependencies in the zone of the observed parameters extreme values, indicative of the onset of explosive transformation, then the revealed extreme values of the parameters are compared with the calculated parameters obtained by means of the kinetic models of the explosives thermal decomposition characterizing the energy state of explosives of an arbitrary type, on the basis of which it is estimated on the adequacy of the used kinetic models types in the establishment of the fact of the onset of explosives explosive transformations.

EFFECT: ensuring the possibility of reliable onset moment and parameters establishment of the critical explosive transformation - a self-sustaining reaction in the samples of explosives, obtaining more accurate and complete information on the parameters of the self-sustaining reaction emergence in the explosives, necessary for verifying adequate kinetic models for the thermal decomposition of explosives and predicting the behavior of general explosives under thermal conditions.

1 tbl, 5 dwg, 1 ex