EFFICIENCY BOOSTING FEATURE OF INTENSIFICATION OF COAL MINE IN DEGASIFICATION

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.

Keywords

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.

REFERENCES:

1.        Instruktsiya po degazatsii ugol'nykh shakht. Seriya 05. Vyp. 22 [Instructions for the degassing of coal mines. Series 05. Issue 22], Moscow, ZAO NTTS PB, 2012, 250 p. [In Russ].

2.        Malashkina V. A. Definition of modes of degassing of coal mines plants with sections of underground pipelines made of composite materials. Gornyy informatsionno-analiticheskiy byulleten’. 2018. Special edition 19, pp. 1—12. [In Russ].

3.        Instruktsiya po primeneniyu skhem provetrivaniya vyemochnykh uchastkov ugol'nykh shakht s izolirovannym otvodom metana iz vyrabotannogo prostranstva s pomoshch'yu gazootsasyvayushchikh ustanovok [Instructions for use schemes of airing of excavation sites of coal mines with isolated removal of methane from out space with gazootsasyvajushchih plants], Order of the Ministry of natural re-sources № 325 from 08.10. 2009. Moscow, 2009. [In Russ].

4.        Karpov E. F., Ryazanov A. V. Avtomatizatsiya i kontrol' degazatsionnykh sistem [Automation and control of degas-sing systems], Moscow, Nedra, 1983, 190 p.

5.        Malashkina V. A., Vostrikova N. A. The choice of modes of transport methane-air mixture through an underground drainage pipe. Gornyy informatsionno-analiticheskiy byulleten’. 2003. Special edition, pp. 13—18. [In Russ].

6.        Malashkina V. A. Directions of increase of efficiency of under-ground degassing to improve the working conditions of miners in coal mines. Gornyy informatsionno-analiticheskiy byulleten’. 2018, no 7, pp. 69—75. [In Russ].

7.        Parmuzin P. N. Zarubezhnyy i otechestvennyy opyt osvoeniya resursov metana ugol'nykh plastov [Foreign and domestic experience of development of resources of coal bed methane], Ukhta, UGTU, 2017, 109 p.

8.        UNECE, Best practice guidance for effective methane drainage and use in coal mines, (U.N. Economic Commission for Europe, ECE Energy Series, No. 31, Geneva, Switzerland, Accessed on 11 March 2017 at: http://www.unece. org/fileadmin/ DAM /energy/se/pdfs/cmm/ pub/ BestPractGuide_MethDrain es31.pdf, 2010).

9.        Krings T., Gerilowski K., Buchwitz M., Hartmann J., Sachs T., Erzinger J., Burrows J., Bovensmann H. Quantification of methane emission rates from coal mine ventilation shafts using airborne remote sensing data. Atmospheric Measurement Techniques. 2013. Vol. 6. Pp. 151—166.

10.     Junjie Chen, Deguang Xu. Ventilation air Methane of Coal Mines as the Sustainable Energy Source. American Journal of Mining and Metallurgy. 2015. Vol. 3. Iss. 1. Рp. 1—8.

11.     Şuvar M. C., Lupu C., Arad V., Cioclea D., Păsculescu V. M., Mija N. Computerized simulation of mine ventilation networks for sustainable decision making process. Environmental Engineering and Management Journal. 2014. Vol. 13. No. 6. Pp. 1445—1451.

12.     Slastunov S. V., Karkashadze G. G., Kolikov K. S. Modern problems of methane safety in high-performance coal mining. Gornyy informatsionno-analiticheskiy byulleten’. 2011. Special edition 1, pp. 202—210. [In Russ].

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