CREATION OF DETONATION PROCESS DURING GAS OUTBURST IN ROADWAY AT SUPERSONIC SPEED

Deeper level coal mining is more frequently exposed to adverse effects which impair safety and slow down production. Such effects are primarily coal/rock/gas outbursts, rock bursts and bleeding. One more category of depressing effects includes chemically responsive dust and gas–air mixtures, as well as places of spontaneous heating. The latter change temperature fields in rocks and mine air, which essentially amplifies proneness of dust and gas–air mixtures to ignition and burning in the mode of deflagration or detonation. This article studies the problem on induced detonation as a result of gas outflow from underground cavity to mine roadway at supersonic speed. Based on the conservation law fundamentals, the formulas are obtained to characterize variation in velocities pressures and densities of dust and gas–air mixture flow at the shock wave front and on the Chapman–Jouguet surface. The graphs are constructed and help reveal some conditions and regular patterns of induced detonation process in dust and gas–air mixtures.


For citation: Cherdantsev S. V., Shlapakov P. A., Lebedev K. S., Kolykhalov V. V. Creation of detonation process during gas outburst in roadway at supersonic speed. MIAB. Mining Inf. Anal. Bull. 2019;(7):62-73. [In Russ]. DOI: 10.25018/0236-1493-2019-07-0-62-73.

Keywords

Mine roadways, dust and gas–air mixture, mass conservation law, law of conservation of momentum, energy law, enthalpy, Mach and Damkohler numbers, Poisson adiabat index, Hugoniot adiabat, Chapman–Jouguet condition.

Issue number: 7
Year: 2019
ISBN: 0236-1493
UDK: 622.272:516.02
DOI: 10.25018/0236-1493-2019-07-0-62-73
Authors: Cherdantsev S. V., Shlapakov P. A., Lebedev K. S., Kolykhalov V. V.

About authors: S.V. Cherdantsev, Dr. Sci. (Eng.), Chief Researcher, e-mail: svch01@yandex.ru, P.A. Shlapakov, Head of Laboratory, е–mail: shlapak1978@mail.ru, K.S. Lebedev, Researcher, е–mail: lebedevks1987@yandex.ru, V.V. Kolykhalov, Senior Researcher, е–mail: x77kem@mail.ru, Join-stock company «Scientific centre VOSTNII on industrial and ecological safety in mountain industry» (JC «NC VOSTNII»), Kemerovo, 650002, Russia. Corresponding author: P.A. Shlapakov, е–mail: shlapak1978@mail.ru.

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