Minieiev S.P., Vasilyev L.M., Trohymets M.Ya., Maltseva V.Ye., Vialushkin Ye.O., Polushyna M.V. The method for driving preparatory roadway in gas-saturated rocks prone to gas-dynamic phenomena

Details
Parent Category: Geo-Technical Mechanics, 2023
Category: Geo-Technical Mechanics, 2023, Issue 165

Geoteh. meh. 2023, 165, 45-50

https://doi.org/10.15407/geotm2023.165.045

 

THE METHOD FOR DRIVING PREPARATORY ROADWAY IN GAS-SATURATED ROCKS PRONE TO GAS-DYNAMIC PHENOMENA

1MinieievS.P., 1VasilyevL.M., 1TrohymetsM.Ya., 1MaltsevaV.Ye., 2Vialushkin Ye.O., 3Polushyna M.V.

1M.S.Polіakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, 2Institute of Industrial and Business Technologies of the Ukrainian State University of Science and Technology, 3Dnipro University of Technology

UDC 622.232.522.24  

Language: English

Abstract. The paper describes the method for safe driving preparatory roadway in gas-saturated rocks prone to gas-dynamic phenomena by applying a set of additional measures to ensure outburst safety in the underground space.
As a result of the analysis of different methods for driving preparatory roadway in gas-saturated rocks prone to gas-dynamic phenomena, the authors of this article designed a new safest method for driving preparatory roadway in gas-saturated rocks prone to gas-dynamic phenomena at the level of the Ukrainian patent No. 151296 for utility model. In order to ensure outburst safety while driving preparatory roadway, additional technological measures must be taken to prevent outburst of coal and gas before heading machine starts to work.
The method includes preliminary drilling of degassing, unloading and injection boreholes in the mine face plane. Before the driving, preliminary reliable information about the categorical need for degassing of the near face zone of rock massif must be obtained. After the degassing, a decision on the safety of further driving with mechanical destruction of the mine face by a heading machine should be made if the following simultaneously obtained indicators are: the gas pressure in the sealed axial injection borehole after degassing is not more than 0.5 MPa; the gas concentration around mine face is not more than 1%; the diameter deformation of discharge holes is not less than 20% from their initial value.
The developed method is carried out by a device consisting of a reinforced rubber flexible hose with seals installed at its ends, inlet and outlet faucets for supplying water to the sealer and draining it away. A metal probe (tube) with a length exceeding the length of the daily works heading is placed in the seals of the sealer with a sliding fit. The metal probe is connected to a pressure gauge. The device is placed in the cavity of a borehole drilled in the centre of the mine face surface along the direction of the preparatory roadway drivage to the depth equal to the length of the daily works heading. After sealing the borehole, the gas pressure in the cavity behind the sealer is measured along its entire length.
The implementation of the developed method for safe driving preparatory roadway in gas-saturated rocks prone to gas-dynamic phenomena by a heading machine can give a good technical result to the mining industry - a significant safety improvement of preparatory roadway drivage, as well as provision of stable speed and continuous mine working as a result of the applying technological measures for preventing sudden gas outbursts. 
Keywords: preparatory roadway, gas-dynamic phenomena, degassing, heading machine.

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About the authors:

Мinieiev Serhii Pavlovych, Doctor of Technical Sciences (D.Sc.), Professor, Head of Department of Pressure Dynamics Control in Rocks, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Vasyliev Leonid Mikhaylovych, Doctor of Technical Sciences (D.Sc.), Professor, Senior Researcher in Department of Pressure Dynamics Control in Rocks, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnіprо, Ukraine.

Trohymets Мyкola Yakovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher in Department of Pressure Dynamics Control in Rocks, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnіprо, Ukraine.

Maltseva Vira Yevhenivna, Senior Engineer in Department of Pressure Dynamics Control in Rocks, М.S. Poliakov Institute of Geotechnical Mechanics  of the NAS of Ukraine (IGTM of the NAS of Ukraine), Dnіprо, Ukraine.

Vialushkin Yehor Olehovych, Engineer, Institute of Industrial and Business Technologies of the Ukrainian State University of Science and Technology, Dnipro, Ukraine.

Polushyna Maryna Vitaliivna, Candidate of Technical Science (Ph.D.), Associate Professor, Associate Professor in Department of Engineering and Design in Machinery Industry, Dnipro University of Technology (NTU "DP"), Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it. .