Zberovskyi V.V. Control of the mud pulse method the loosening of coal layers by amplitude-frequency recommendation of acoustic signal by the APSS-1 system

Details
Parent Category: Geo-Technical Mechanics, 2019
Category: Geo-Technical Mechanics, 2019, Issue 147

Geoteh. meh. 2019, 147, 183-190

https://doi.org/10.1051/e3sconf/201910900122

control of the mud pulse method the loosening of coal layers by amplitude-frequency recommendation of acoustic signal by the APSS-1 system

1Zberovskyi V.V.

1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDC 621.313.12-752.001.5:532.528                      

Language: English

Abstract.

The results of hydroimpulse loosening method parameters studies  of outburst coal seams in the faces of the preparatory workings by the APSS-1 system are given in the article. The results of monitoring and evaluating the effectiveness of hydraulic loosening in the static and pulsed fluid injection mode, the main provisions of the developed methods and additions to the methods of acoustic control for the purpose of their use in hydroimpulse exposure are presented.

The use of the APSS-1 system to control the parameters of the hydro-pulse impact required additional studies. This determined the purpose and objectives of the work. The control of the discharge zone, the liquid injection pressure, the period of the active hydraulic loosening process and the emission factor allowed the adjustment of the acoustic control parameters. The acoustic signal parameters are used to study the stress-strain state of rocks in the formation roof.

Evaluation of the method's effectiveness is carried out by comparing the results of static and pulsed modes of fluid injection.

It is established that the use of pulsed fluid injection leads to a decrease in the active stage of the hydraulic loosening process and an increase in its efficiency. The influence of hydroimpulse exposure is recorded at a distance of more than 20 m, which indicates a uniform (without delay) development of deformations in the rocks of the formation roof. This leads to a reduction in front of the bottom of the mine by at least 25% of the array tension and an increase to 74% of the low-frequency component of the dynamic load.

The use of hydroimpulse hydraulic loosening of outburst coal seams can significantly reduce the active stage of the hydraulic loosening process and increase the safe zone of excavation to the depth of well drilling. In order to maintain the maximum pace of workings out, measures must be carried out continuously every 6-7 meters by a combine with coal.

Keywords: outburst coal seam, hydroimpulse impact, preparatory development, work safety.

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About the author

ZberovskyiVasylVladislavovych, Doctor f technical Sciences (D. Sc.), Senior Researcher in Department of Rock Breaking Problems, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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