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METHOD OF MONITORING THE DYNAMICS OF LONGWALLS WORK
BY PARAMETERS OF UNDERGROUND MINING
Merzlikin Artem1*
1Donetsk National Technical University, Pokrovsk, Donetsk region, Ukraine
*Corresponding author:
e-mail: artem.merzlikin@donntu.edu.ua
Physical and technical
problems of mining production, 2021, (23), 216-228.
https://doi.org/10.37101/ftpgp23.01.014
full
text (pdf)
ABSTRACT
Purpose. Development
of methods for monitoring the dynamics of coal production
from treatment pits on the
basis of analysis of their work on the distribution
of daily and monthly coal production. The tasks of
the research are the analysis
of histograms of distribution and establishment of quantitative connection between the indicator of rhythm of
lava and the degree of its controllability.
Method. Statistical
analysis of daily production from complex mechanized treatment pits is performed.
It is proved that stable values of the first
initial, as well as the
second and third central statistical moments are provided under the condition
of using a sliding window lasting 16-18 days.
Findings. A significant
statistical relationship
was found between the duration of continuous daily growth of the
coefficient of variation of production and its subsequent steady decline. It is shown
that a continuous increase in the coefficient of variation of production for 5-6 days is dangerous (critical) and leads to a decrease in the level of
controllability of the treatment face. It was
found that the lava responds
to a critical level of fluctuation
of production with a delay of 6 days.
Scientific novelty. For
the first time it was
established that the histograms of variation of stable production
from controlled bottomholes are asymmetric and shifted towards the planned load, and in
weakly controlled ones - symmetric, and the amplitude
of variation of production from bottomholes is exponentially dependent on its value, which increases reliability. results of quantitative forecast of risks of loss
of rhythm of the main
and auxiliary processes of coal mining.
Practical implications. A method
of monitoring the dynamics of production is proposed, which provides a timely response to the negative
trend of controllability of the treatment face. The application
of such a technique allows you to quickly
take measures to stabilize or improve the controllability of the lava
and, as a consequence, to ensure a sustainable level of production.
Keywords: variation
of mining, controllability, stable work, distribution histogram
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