Methodology for investigation of stone dust combustion and detonation processes in mining

Родионов, В. А.; Abiev, Zaur A.; Zhikharev, Sergey

doi:10.15593/2224-9923/2018.1.5

Cited by 2 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the help of an explosive combustion chamber designed as a sphere with a volume of 20 litres (Rodionov et al, 2018), it is shown that the particle-size distribution of coal dust affects the explosion pressure, the rate of increase of the explosion pressure and the transformation ratio. It was proven that dust with a fractional size distribution of 63-94 μm has the most explosive properties.…”

Section: Analysis Of Recent Research and Publicationsmentioning

confidence: 99%

Mechanism of Coal Aerosol Explosion Development in an Experimental Mine Working

Костенко

Bohomaz

Kostenko

et al. 2023

MGPB

View full text Add to dashboard Cite

Today there is not enough scientific data on the energy level and the velocity of an explosion in actual mine workings, which have a cross-sectional area larger than experimental mine workings. The objective of the paper is to justify the energy parameters of an explosion in actual mine workings based on the disclosure of the fire front development mechanism when coal dust explodes in an experimental mine working with a limited cross-sectional area. These studies can be the basis for choosing the speed of action and the strength of the means of the localization of dust explosions. The main research method is an experimental and analytical method, based on the analysis of the results of experimental explosions of coal dust in experimental mine workings and theoretical substantiation of the regularities of the development of the velocity and additional energy of the fire front with further extrapolation to the conditions of actual mine workings. It is proposed to supplement the mechanism of explosion development with an idea about the sections of development of explosion dynamics, i.e. initiation, dust explosion, crater, which determine the characteristic parameters of the explosive front velocity: maximum initiating velocity, average velocity, and maximum velocity in a crater. It was established that during methane initiation in the experimental mine working at the boundary between the initiation and dusting zones, there is a situation of a hybrid explosion of a mixture of methane and dust with air, which has its own velocity and energy indicators. A linear dependence of the energy generated during the coal aerosol explosion on the cross-sectional plane of the mine working was established. This makes it possible to use the results of testing the coal from certain deposits in small-scale experimental set-ups to justify the parameters of protective means for the actual mine workings.

show abstract

Section: Analysis Of Recent Research and Publicationsmentioning

confidence: 99%

Mechanism of Coal Aerosol Explosion Development in an Experimental Mine Working

Костенко

Bohomaz

Kostenko

et al. 2023

MGPB

View full text Add to dashboard Cite

show abstract

“…It is confirmed that as the particle size of coal dust decreases, its burning rate increases.Particles of coal dust with a size of 44 μm and 37 μm have a higher burning rate when compared to other sizes [2]. The analysis of laboratory experiments proved that dust with a fractional composition of 63…94 μm possesses the most explosive properties [3]. This may be due to the polymodal composition of dust deposits, which leads to the simultaneous reaction of different fractions of fuel [4].…”

mentioning

confidence: 99%

Substantiation of Design Parameters of Coal Dust Explosion Containment System

Kostenko¹,

Zavialova²,

Pozdieiev³

et al. 2021

News of NAN RK. SGTS

View full text Add to dashboard Cite

The aim of the paper is to identify the qualitative and quantitative parameters of seismic waves and accelerations on the mine working contour after an explosion of the gas-and-dust mixture. Information about the formation of seismic waves in the rock mass accommodating the mine working was received using modelling in order to improve the means of containment of explosion of further developed dust-air mixture. The parameters of seismic waves, such as propagation velocity and acceleration, amplitude, and frequency of oscillations of mine working walls, were established for the conditions of the experimental structure, which allows to scientifically substantiating the design parameters of the systems protecting the miners against explosion. The energy of the explosion propagates in the rock mass in the form of a series of peak-like pulses and oscillations with smaller amplitude. Modulus of acceleration is an informational indicator, which suits the most for registration by seismic sensors responding, specifically, to the most powerful peak pulses formed by seismic waves. By revealing the qualitative and quantitative indicators of seismic wave propagation on the mine working contour and in the rock mass, the parameters of seismic sensors of the systems protecting the miners against explosion can be substantiated.

show abstract

Methodology for investigation of stone dust combustion and detonation processes in mining

Cited by 2 publications

References 4 publications

Mechanism of Coal Aerosol Explosion Development in an Experimental Mine Working

Mechanism of Coal Aerosol Explosion Development in an Experimental Mine Working

Substantiation of Design Parameters of Coal Dust Explosion Containment System

Contact Info

Product

Resources

About