Tula State University (Tula, Russia):

Kachurin N. M., Head of Department, Doctor of Engineering Sciences e-mail: ecology@tsu.tula.ru

FGAOU VPO "Belgorod State National Research University" Higher School "BSU":
Vorob’ev S. A., Candidate of Engineering Sciences

Moscow State Mining University (Moscow, Russia):
Kachurin A. N., Engineer

Under study are the processes of methane release from coal under rapid advance of development heading. The mathematical models of gas release from exposed coal surface are presented and compared with mine observations. Intensity of methane release directly relates with the development heading advance rate and the development heading length as per project. Analysis of these relationships shows that in the course of drivage, methane release increases because of enlargement of gas-releasing surface. The gas-releasing surface is at first subjected to maximum pressure difference. Then, outgassing takes place in the coal seam tail-piece that contacts the development heading atmosphere. The developed prediction procedure for methane release dynamics in development heading was approved in 16 development headings of 6 mines within Yuzhkuzbassugol Coal Company. The comparison of the absolute methane contents predicted by the proposed and current procedures shows that the current procedure yields an underestimated value of methane release from exposed seam surface. In whole, the theoretical and experimental research findings display satisfactory compliance and adequacy of the procedural postulates.

1. Kachurin N. M., Klishin V. I., Borshchevich A. M., Kachurin A. N. Prognoz metanovoy opasnosti ugolnykh shakht pri intensivnoy otrabotke ugolnykh plastov (Forecast of methane hazard of coal mines in the time of intensive development of coal layers). Tula – Kemerovo : Tula State University, 2013, 220 p.
2. Kachurin N. M. Izvestiya vuzov. Gornyy zhurnal – Proceedings of universities. Mining Journal, 1991, No. 1, pp. 43–47.
3. Kachurin N. M., Kaledina N. O., Kachurin A. N. Bezopasnost zhiznedeyatelnosti – Life safety, 2012, No. 5, pp. 8–11.
4. Kachurin N., Borschevich A., Kachurin A. Methane emission into Production Face from Enclosing Strata. Tehnika (Belgrade), 2013, No. 2, pp. 231–234.
5. N. Kachurin, N. Kaledina, A. Kachurin. Methane emanation from coal seam side faces by the high advance rate of development face. Underground Mining Engineering : Belgrade University, June 2013, pp. 6–9.