Petukh O.P., Sofiiskyi K.K., Zhytlonok D.M. Laboratory research of vibration impact parameters on the coal seam through host rocks
- Деталі
- Батьківська категорія: Геотехнічна механіка, 2019
- Категорія: Геотехнічна механіка, 2019, № 147
Geoteh. meh. 2019, 147, 100-110
https://doi.org/10.1051/e3sconf/201910900069
LABORATORY RESEARCH OF VIBRATION IMPACT PARAMETERS ON THE COAL SEAM THROUGH HOST ROCKS
1Petukh O.P., 1Sofiiskyi K.K., 2Zhytlonok D.M.
1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine,2 StateEnterprise “Toretskvuhillia”
UDC [622.831.24-868:622-112].001.53
Language: English
Abstract.
Abstract. The article is devoted to the stand tests research of the hydraulic vibrator systems and the establishment of their main parameters for influencing the coal-rock massive through the host rocks.
Based on the struts of mechanized supports, hydraulic systems of the vibrators working as compact vibratory machines are selected and improved. They carry out the controlling function of the coal-rock massive state through the host rocks in the longwall, working out hazardous flat-falling coal seams with hard-to-break roofs, often represented by hazardous sandstones. Stand tests of vibrator systems of two and three racks of hydraulic supports, which operate in continuous and pulsed modes with automatic and manual control, are carried out. In this case, the frequency-amplitude characteristics are obtained. Namely: the time of the liquid pressure relief and the synchronous operation of the hydraulic racks is determined. For this purpose, the laboratory stand is equipped with strain gauge pressure sensors and manometers. The study of the characteristics of hydraulic vibrator systems is carried out at various initial pressures, volumes of the piston cavities, rotation of the air motor, etc. Evaluation of the measurement results made it possible to establish that the true values of the measured quantities are in the necessary intervals. The main parameters of hydraulic vibrator systems, the frequency and amplitude of the impact are determined, and the fundamental possibility of their operation as compact hydraulic machines in the lavas of mines hazardous by sudden emissions of coal and gas and rock emissions is proved. Measurement of sound level, vibration pressure (up to 12 m/s2) and vibration velocity (up to 1.4 m/s) meets safety requirements. When conducting stand tests, there were no significant malfunctions in the operation of the hydraulic vibrator system, which indicates its high reliability.
The principal possibility of using hydraulic systems as compact hydraulic machines has been established for controlling the condition of the coal and rock massif, moving the reference pressure zone from the bottom of the clearing generation and controlling the rock pressure of a hard-to-reach roof.
Keywords: hydraulic vibrator systems, hydraulic machines, coal-rock massive, vibration pressure, vibration velocity.
REFERENCES
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2. Kryshnev, A.S. (2012). “The results of laboratory studies when exposed to a coal seam system of hydraulic vibrators through the host rocks”, Geo-Technical Mechanics, no. 104, pp. 18-23.
3. Zhytlonok, D.M., Kryshnev, A.S., Petukh, A.P., Zolotin, V.G. (2012). “The results of experimental studies of the control of the state of the massif during vibration impact to coal seams through the host rocks”, Geo-Technical Mechanics, no. 101, pp. 276-283.
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About the authors
Petukh Oleksandr Petrovych, Candidate of Technical Sciences (Ph.D), Senior Researcher in Department of Underground Coal Mining Technology, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, Ця електронна адреса захищена від спам-ботів. вам потрібно увімкнути JavaScript, щоб побачити її.
Sofiiskyi Kostiantyn Kostiantynovych, Professor, Doctor of Technical Sciences (D. Sc.), Head of Department of Underground Coal Mining, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, Ця електронна адреса захищена від спам-ботів. вам потрібно увімкнути JavaScript, щоб побачити її.
Zhytlonok Dmytro Musiyovych, Professor, Doctor of Technical Sciences (D. Sc.), Scientific Advisor of State Enterprise “Toretskvuhillia”, Toretsk, Ukraine, Ця електронна адреса захищена від спам-ботів. вам потрібно увімкнути JavaScript, щоб побачити її.