Improvement of Degassing Efficiency at Coal Seams High Productive Development


Annotation:

Methods for improving degassing efficiency of the developed space with the extraction of the conditioned gas can be based on the use of gas-draining workings and the use of the complex shape wells. The distinctive feature of the use of gas-draining workings is that the gas extraction is constantly carried out from the zone that most actively effects on the gas situation in the lava, while vertical wells reduce their influence as a result of lava movement. The method is shown concerning the developed space degassing by wells from the surface, the design and profile of which allow to preserve them during underworking and to operate them much longer and with a higher effect.

Improvement of degassing the deposit under development in modern conditions should be based on the use of the methods that ensure increased gas permeability of the coal seam. The most practical interest is rather simple, reliable and quickly implemented technology of coal seams hydraulic fracturing through the underground interbedding wells. Field tests conducted at the mine named after S.M. Kirov in Kuzbass, allowed to test the process flowsheet effect on the coal seam and evaluate the efficiency of in-seam gas drainage integrated technology.

Methodologically correct assessment of the efficiency of the developed technology was carried out in the process of second working by lava 24–58. It was established that the average value of the relative gas content of the working face in the area of implementation of the underground hydraulic fracturing technology was reduced by 30 %, production was increased by 20 %, the duration of mining equipment shutdown for ventilation decreased by more than 40 %, which allows to give positive assessment of the efficiency and prospects for further practical application of this method.

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DOI: 10.24000/0409-2961-2019-1-71-76
Year: 2019
Issue num: January
Keywords : degassing efficiency mined-out space gas content load gas release reservoir properties intensification reservoir under development
Authors:
  • Kolikov K.S.
    Kolikov K.S.
    Dr. Sci. (Eng.), Prof., Head of Department, kolikovks@mail.ru, NITU MISiS, Moscow, Russia
  • Slastunov S.V.
    Slastunov S.V.
    Dr. Sci. (Eng.), Prof. NITU MISiS, Moscow, Russia
  • Mazanik E.V.
    Mazanik E.V.
    Cand. Sci. (Eng.), Director AO SUEK-Kuzbass, Leninsk-Kuznetsky, Russia