Aspects of the gas content of the host rocks of the bedrock diamond deposit of the Mir kimberlite pipe are considered. The intervals of gas-saturated reservoirs in the interval of the Tolbachan were studied and identified, the effect of discontinuous disturbances on their fluid saturation is given. The research results allow to predict the nature of gas occurrences and the amount of reservoir gases during the mining of the Mir tube indigenous diamond deposit in the Tolbachan formation interval. The efficiency of the proposed method of degassing host rocks is confirmed by the already achieved significant (20–30 times) drop in the flow rates of observed gas manifestations at analogous deposits, and the absence of cases of gassing in the opening workings and stopes of mines over the past 3–5 years. Degassing of host rocks is carried out in two stages. At the first stage, a circular system of vertical leading wells is drilled to the full capacity of the production block. Calculations showed as follows: the system of advanced degassing of reservoirs of the Tolbachan should consist of 64 wells with a depth of 350 m each. To ensure safe mining, drilling of holes should be carried out directly from the underground mine workings, using blowout control equipment designed for a pressure of 225–250 kgf/cm2. Subsequently, the residual pressure in the massif will not exceed 30–40 kgf/cm2, which will allow to move on to the second stage of massif unloading — drilling of slightly inclined wells directly from the faces of the underground mine workings under construction.
2. Yannikov A.M., Kharchenko A.V. Degassing Drilling as an Effective Way to Unload Carbonate Reservoirs of the Host Rock Mass of Primary Diamond Deposits. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2021. № 6. pp. 88–94. (In Russ.). DOI: 10.24000/0409-2961-2021-6-88-94
3. Gernon T.M., Sparks R.S.J., Field M. Degassing structures in volcaniclastic kimberlite: Examples from southern African kimberlite pipes. Journal of Volcanology and Geothermal Research. 2008. Vol. 174. Iss. 1–3. pp. 186–194.
4. Dongre A., Tappe S. Kimberlite and carbonatite dykes within the Premier diatreme root (Cullinan Diamond Mine, South Africa): New insights to mineralogical-genetic classifications and magma CO2 degassing. Lithos. 2019. Vol. 338–339. pp. 155–173. DOI: 10.1016/j.lithos.2019.04.020
5. Kolganov V.F., Akishev A.N., Drozdov A.V. Mining and geological features of primary diamond deposits in Yakutia. Mirnyy: Institut «Yakutniproalmaz», 2013. 568 p. (In Russ.).
6. Bodunov E.I., Beletskiy V.L., Fradkin G.S. Geology, hydrogeology and geochemistry of oil and gas of the southern slope of the Anabar anteclise. Yakutsk: YaF SO AN SSSR, 1986. 176 p. (In Russ.).
7. Giniyatulin I.M., Blazhkun D.V., Ivashina E.I., Korobkov G.V. Materials for the legend of the Botuobinskaya series of sheets of the geological maps at a scale of 1:50 000. Mirny, 1989. 70 p. (In Russ.).
8. Yannikov A.M., Golovanev A.O. Gas content of deposits of the tolbachanskaya suite in the near-pipe space of the «Internatsionalnaya » pipe. Estestvennye i tekhnicheskie nauki = Natural and technical sciences. 2018. № 10 (124). pp. 83–87. (In Russ.).
9. Alekseev S.V., Alekseeva L.P., Borisov V.N., Shouakar-Stash O., Frape S.K., Chabaux F., Kononov A.M. Isotopic composition (H, O, Cl, Sr) of the underground brines of the Siberian platform. Geologiya i geofizika = Geology and Geophysics. 2007. Vol. 48. № 3. pp. 291–304. (In Russ.).
10. Zueva I.N, Utkina N.A., Bodunov E.I. Chemical structure of naphthides in Daldyn-Alakitsky region (according to IR and UV spectroscopy data). Geology, hydrogeology and geochemistry of oil and gas of the southern slope of the Anabarskaya anteclise. Yakutsk: Izd-vo YaF SO AN SSSR, 1986. pp. 99–110. (In Russ.).
11. Yannikova S.A., Yannikov A.M. Gas-dynamic characteristics of the host rocks of Mir pipe mine field deep horizons. Nauki o Zemle i nedropolzovanie = Earth Sciences and Subsoil Use. 2021. Vol. 44. № 3 (76). pp. 293–300. (In Russ.). DOI: 10.21285/2686-9993-2021-44-3-293-300
12. Zheng C., Jiang B., Xue S., Chen Z., Li H. Coalbed methane emissions and drainage methods in underground mining for mining safety and environmental benefits: A review. Process Safety and Environmental Protection. 2019. Vol. 127. pp. 103–124. DOI: 10.1016/j.psep.2019.05.010
13. Zheng C., Kizil M.S., Chen Z., Aminossadati S.M. Role of multi-seam interaction on gas drainage engineering design for mining safety and environmental benefits: Linking coal damage to permeability variation. Process Safety and Environmental Protection. 2018. Vol. 114. pp. 310–322. DOI: 10.1016/j.psep.2018.01.011
14. Drozdov A.V., Iost N.A., Lobanov V.V. Cryohydrogeology of the diamond deposits in Western Yakutia. Irkutsk: Izd-vo IGTU, 2008. 507 p. (In Russ.).
15. Hydrogeology of the USSR: Yakutskaya ASSR. In 46 v. V. 20. Moscow: Izd-vo «Nedra», 1970. 384 p. (In Russ.).
16. Pinneker E.V. Brines of Angara-Lena artesian basin. Moscow: Nauka, 1966. 332 p. (In Russ.).
17. Keegan-Treloar R., Irvine D.J., Solórzano-Rivas S. C., Werner A. D., Banks E.W., Currell M.J. Fault-controlled springs: A review. Earth-Science Reviews. 2022. Vol. 230. p. 104058. DOI: 10.1016/j.earscirev.2022.104058