Identification algorithm of diagonal branches in mine ventilation systems for higher safety in operation

Operating safety in mining is achieved through efficient and reliable performance of mine ventilation systems (MVS). The early-stage enhancement of efficient and reliable performance of MVS involves rehabilitation of the system without its re-design. When developing the procedure of choice of activities to ensure a rational current emergency maintenance tactics, it is necessary to formulate prestrategic rules. The source information in this case is the list of fault codes and a matrix of diagonal branches in the system of air consumers based on the simulation modeling of reference MVS performance to analyze its efficiency and reliability. The identification algorithm is developed to determine unsafe prohibited sequential ventilation (i.e. pollution) of air consumers and to select diagonal branches and air leakage points. The algorithm uses dynamic hierarchical segmentation of MVS with respect to fresh air flow and return ventilation current. The algorithm allows construction of a matrix of diagonal branches and leakage points. In view of dynamic nature of MVS, identification of diagonal branches and leakage points is performed in a real time in the form of air distribution calculation at the moment of a fault. This enables a real-time and optimized air distribution control when selecting efficient MVS rehabilitation tactics. Enhanced recoverability of MVS improves safety of mining by ventilation criterion and provides comfortable operation conditions for mine personnel.

Ushakov V. K. Identification algorithm of diagonal branches in mine ventilation systems for higher safety in operation. MIAB. Mining Inf. Anal. Bull. 2020;(12):147-155. [In Russ]. DOI: 10.25018/0236-1493-2020-12-0-147-155.

V.K. Ushakov, Dr. Sci. (Eng.), Professor, e-mail: vk.ushakov@misis.ru, National University of Science and Technology «MISiS», Moscow, Russia.

1. Puchkov L. A., Kaledina N. O. Kobylkin S. S. Natural science-based analysis of critical pro-cess hazards. Gornyi Zhurnal. 2015, no 5, pp. 4—7. [In Russ].

2. Skopintseva O. V., Balovtsev S. V. Evaluation of the influence of aerodynamic aging of production on aerological risks on coal mines. MIAB. Mining Inf. Anal. Bull. 2020, no 6-1, pp. 74–83. [In Russ]. DOI: 10.25018/0236-1493-2020-61-0-74-83.

3. Balovtsev S. V. Aerological risk assessment in working areas of gas and dust explosionhazardous coal mines. Gornyi Zhurnal. 2015, no 5, pp. 91—93. [In Russ]. DOI: 10.17580/ gzh.2015.05.19.

4. Skopintseva O. V., Vertinskiy A. S., Ilyakhin S. V., Savelev D. I., Prokopovich A.Yu., Substantiation of efficient parameters of dust-controlling processing of coal massif in mines. Gornyi Zhurnal. 2014, no 5, pp. 17—20. [In Russ].

5. Ushakov V. K. Cost estimate of mine ventilation system design and operation towards enhanced labor safety. MIAB. Mining Inf. Anal. Bull. 2018, no 6, pp. 214—221. [In Russ]. DOI: 10.25018/0236-1493-2018-6-0-214-221.

6. Puchkov L. A., Kaledina N. O., Kobylkin S. S. System solutions of provision of methane safety of coal mines. Gornyi Zhurnal. 2014, no 5, pp. 12—16. [In Russ].

7. Rodriguez-Diaz O.-O., Novella-Rodriguez D. F., Witrant E., Franco-Mejia E. Control strategies for ventilation networks in small-scale mines using an experimental benchmark. Asian Journal of Control. 2020. https://onlinelibrary.wiley.com/doi/full/10.1002/asjc.2394. DOI: 10.1002/asjc.2394.

8. Pei X., Wang, K, Jiang S., Wu Z., Shao H. Experimental study on ventilation supply–demand matching to dispense the stope gas disaster risk of coal mines. Geomatics, Natural Hazards and Risk. 2020. Vol. 11. Pp. 1299—1318. https://www.tandfonline.com/doi/full/10.1080/194757 05.2020.1788172. DOI: 10.1080/19475705.2020.1788172.

9. Mishra D. P., Panigrahi D. C., Kumar P., Kumar A., Sinha P. K. Assessment of relative impacts of various geo-mining factors on methane dispersion for safety in gassy underground coal mines: an artificial neural networks approach. International Journal of Heat and Mass Transfer. 2020. Vol. 150. No 119392. https://link.springer.com/article/10.1007/s00521-020-04974-9. DOI: 10.1007/s00521-020-04974-9.

10. El-Nagdy K. A. Stability of multiple fans in mine ventilation networks. International Journal of Mining Science and Technology. 2013. Vol. 23. No 4. Pp. 569—571. DOI: 10.1016/j. ijmst.2013.07.016

11. Batugin A. S., Kobylkin A. S., Musina V. R. Effect of geodynamic setting on spontaneous combustion of coal waste dumps. Eurasian Mining. 2019. No 2. Pp. 64—69. DOI: 10.17580/ em.2019.02.14.

12. Kolikov K. S., Kaledina, N.O., Kobylkin, S.S. Mining safety and ecology department: Past, present and future. Gornyi Zhurnal. 2018, no 3, pp. 15—26. [In Russ]. DOI: 10.17580/ gzh.2018.03.04.

13. Shkundin S. Z., Petrov А. G., Lupiy М. G., Vanovsky V. V., Tantsov P. N. Software complex for dynamic coal mines air distribution. Ugol’. 2017, no 12, pp. 32—34. [In Russ].

14. Dziurzynski W., Krach A., Palka T. A reliable method of completing and compensating the results of measurements of flow parametres in a network of headings. Archives of Mining Sciences. 2015. Vol. 60. No 1. Pp. 3—24.

15. Brickey A. J., Lopes T. V. F. Incorporation Ventilation into Production Scheduling. Proceedings of the 16th North American Mine Ventilation Symposium, June 17—22, 2017. Pp. 2-23—2-28.

16. Castilla-Gomez J., Herrera-Herbert J., Campillos-Prieto A. Modelling and optimization of a ventilation network in underground mines. 15th International Multidisciplinary Scientific GeoConference SGEM 2015. Conference Proceedings. 2015, Book 1, Vol. 3. Pр. 469—475.

17. Ushakov V. K. Dynamic hierarchical segmentation of mine ventilation systems in modeling methods of improvement of aerological safety. MIAB. Mining Inf. Anal. Bull. 2019, no 12, pp. 76—85. [In Russ]. DOI: 10.25018/0236-1493-2019-12-0-76-85.

18. Landry M. J. The coset construction for non-equilibrium systems. JHEP 07, 200 (2020) DOI: 10.1007 / JHEP07(2020)200 [arXiv:1912.12301[hep-th]].

19. Landry M. J. Dynamical chemistry: non-equilibrium effective actions for reactive fluids. [arXiv:2006.13220[hep-th]].