Assessment and monitoring of a technique for rapid multi-stage weakening of poorly caving roof using directional hydraulic fracturing
V.I. Klishin1, G.Y. Opruk1, P.V. Grechishkin2, S.I. Svyazev1
1 Federal Research Center for Coal and Coal Chemistry of the Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation
2 JSC “Scientific Research Institute of Mining Geomechanics and Surveying – Intersectoral Research Center “VNIMI”, St. Petersburg, Russian Federation
Russian Mining Industry №S2 / 2023 р. 101-107
Abstract: This Based on assessing the current state of rock pressure manifestation in the mining face and development workings, a technique was proposed for multi-stage control of poorly caving roof using directional hydraulic fracturing, which is widely used in the mines of Kuzbass. Longwall face 43K10-V in the Saranskaya mine of ArcelorMittal Temirtau Coal Department was used as an example to discuss a complex approach to addressing the challenges of high stresses within the coal seam, squeezing and guttering up at the stoping face. Application of the technique for rapid multi-stage weakening of poorly caving roof from inside the mining face made it possible to implement the measures and avoid downtime of the mining face. Monitoring of the implemented measures by recording changes in the stress-and-strain state of the rock mass at the test site has demonstrated the efficiency of the applied technology.
Keywords: rock pressure, poorly caving roof, weakening, directional hydraulic fracturing, mine test, assessment and monitoring
Acknowledgments: The research was carried out as part of the ‘Development and implementation of complex technologies in the areas of exploration and extraction of minerals, industrial safety, bioremediation, creation of new deep conversion products from coal raw materials while consistently reducing the environmental impact and risks to human life’ Integrated Scientific and Technical Programme of the Full Innovation Cycle, approved by Order No.1144-р of the Government of the Russian Federation dated May 11, 2022 (Agreement No.075-15-2022-1191).
For citation: Klishin V.I., Opruk G.Yu., Grechishkin P.V., Svyazev S.I. Assessment and monitoring of a technique for rapid multistage weakening of poorly caving roof using directional hydraulic fracturing. Russian Mining Industry. 2023;(S2):101–107. https://doi.org/10.30686/1609-9192-2023-S2-101-107
Article info
Received: 25.07.2023
Revised: 17.08.2023
Accepted: 21.08.2023
Information about the authors
Vladimir I. Klishin – Dr. Sci. (Eng.), Corresponding Member of the Russian Academy of Sciences, Professor, Director of the Institute of Coal, Federal Research Center of Coal and Coal Chemistry of Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. Gleb Yu. Opruk – Cand. Sci. (Eng.), Head of the Laboratory of Effective Technologies for Coal Mining, Federal Research Center of Coal and Coal Chemistry of Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Pavel V. Grechishkin – Cand. Sci. (Eng.), Director, JSC “Scientific Research Institute of Mining Geomechanics and Surveying – Intersectoral Research Center “VNIMI”, St. Petersburg, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Sergey I. Svyazev – Senior Engineer, Coal Engineering Laboratory, Institute of Coal, Federal Research Center of Coal and Coal Chemistry of Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
References
1. Shinkevich M.V., Rodin R.I. Change in the rock pressure when mining a coal seam with a longwall face. Occupational Safety in Industry. 2021;(5):65–69. (In Russ.) https://doi.org/10.24000/0409-2961-2021-5-65-69
2. Shinkevich M.V. Periodicity of change of rock pressure on mechanized support of cleaning face. Bulletin of Scientific Centre VostNII for Industrial and Environmental Safety. 2021;(2):30–37. (In Russ.) https://doi.org/10.25558/VOSTNII.2021.32.94.004
3. Shinkevich M.V., Rodin R.I. Rock pressure waviness during longwall working. Vestnik nauchnogo tsentra po bezopasnosti rabot v ugolnoi promyshlennosti = Bulletin of Research Center for Safety in Coal Industry (Industial Safety). 2020;(4):90–94. (In Russ.)
4. Reuter M., Kurfürst V., Mayrhofer K., Veksler J. Undulant rock pressure distribution along a longwall face. Fiziko-Texhnicheskiye Problemy Razrabbotki Poleznykh Iskopaemykh. 2009;(2):38–45. (In Russ.)
5. Reuter M., Veksler J. Longwall automation: enhancing productivity and controlling hazardous rock pressures. Sibirskii Ugol'. 2008;(4):7. (In Russ.)
6. Klishin V.I. Adaptation of powered roof supports to conditions of dynamic loading. Novosibirsk: Nauka; 2002. 200 p. (In Russ.)
7. Klishin V.I., Zvorygin L.V., Lebedev A.V., Savchenko A.V. Safety challenges and new technologies of underground mining of coal deposits. Novosibirsk: Novosibirskii pisatel; 2011. 524 p. (In Russ.)
8. Drzewiecki J. Neue Verfahren zur Bekämpfung der Gebirgsschlaggefahr Wassertaschen – eine wirkungsvolle Neuentwicklung für den konstruktiven Explosionsschutz im Bergbau unter Tage. Glückauf. 2002;(3).
9. Huang B., Liu J., Zhang Q. The reasonable breaking location of overhanging hard roof for directional hydraulic fracturing to control strong strata behaviors of gob-side entry. International Journal of Rock Mechanics and Mining Sciences. 2018;103:1–11. https://doi.org/10.1016/j.ijrmms.2018.01.013
10. Huang B., Zhao X., Ma J., Sun T. Field experiment of destress hydraulic fracturing for controlling the large deformation of the dynamic pressure entry heading adjacent to the advancing longwall face. Archives of Mining Sciences. 2019;64(4):829–848. Available at: https://paperity.org/p/274660307/field-experiment-of-destress-hydraulic-fracturing-for-controlling-the-largedeformation
11. He H., Dou L., Fan J., Du T., Sun X. Deep-hole directional fracturing of thick hard roof for rockburst prevention. Tunnelling and Underground Space Technology. 2012;32:34–43. https://doi.org/10.1016/j.tust.2012.05.002
12. Grechishkin P.V., Kharchenko V.F., Rozonov E.Yu., Gornostaev V.S., Panin S.F. Improving the efficiency of assessing the condition of roofing rock formations using various methods in the conditions of the “Chertinskaya-Koksovaya” mine. Ugol’. 2019;(10):42–48. (In Russ.) https://doi.org/10.18796/0041-5790-2019-10-42-46
