As a consequence of inefficient degassing in many high-gas coal mines, methane release in roadways exceeds permissible rates, prevents high-capacity mining machines from reaching project output per face, and causes explosions of mine methane and gas-and-dust mixtures. These events become more frequent is mining is advanced with the related expansion of branched net of underground degasification pipelines. Vacuum pumps operate at the same preset capacity, and rarefaction at holes is often zero. Methane flows from holes by gravity but not every time. Under such conditions, mine personnel safety and nonstall coal production are only feasible through stabilization of methane content of coal mine air within standard ranges. To this effect, many coal mines in Russia apply integrated degasification, i.e. in-mine drainage of methane sources and surface gas suction. These actions allow meeting the set objectives at the continuous growth of mining depth and length of roadways in coal mines due to reduction in pressure loss and, consequently, in rarefaction drop along the underground vacuum pipeline by using pipe sections and connection fittings made of composite (fiberglass) materials.

For citation: Malashkina V. A. Efficiency boosting feature of intensification of coal mine in degasification. MIAB. Mining Inf. Anal. Bull. 2019;(9):131-137. [In Russ]. DOI: 10.25018/0236-1493-2019-090-131-137.


Degasification, pressure loss, underground vacuum gas pipeline, methane-and-air mixture, fiberglass pipeline.

Issue number: 9
Year: 2019
ISBN: 0236-1493
UDK: 622.831
DOI: 10.25018/0236-1493-2019-09-0-131-137
Authors: Malashkina V. A.

About authors: V.A. Malashkina1, Doctor of Technical Sciences, Professor, e-mail: Promecolodgy@mail.ru, Mining Institute, National University of Science and Technology «MISiS», 119049, Moscow, Russia.


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