Coalbed low-amplitude tectonic disturbance detection by horizontal directional drilling

Low-amplitude tectonics investigations at Chulmakanskoye coal deposit have been studied from the beginning of the development phase. The first significant findings were obtained as a result of ground-based geophysical work in the central part of the Inaglinskaya mine field. However, the findings showed low reliability in terms of minor fault prediction within the mine field. According to check drilling data only 57% of the predicted faults were confirmed. An innovative technique of the horizontal directional borehole drilling from airway into the seam was proposed to study the minor faults of the D15 coal seam at Inaglinskaya mine field development. The main objective of the study was to spot low-amplitude tectonic dislocations and to study seam occurrence variations along the strike and down-dip within the surveyed section. The main factors in tectonic disturbance spotting were taken as follows: seam roof vertical shifts, drastic variations of seam dip and thickness, technological factors of drilling (fluid loss, drill sticking, etc.). HDD Borehole No.1 was sunk in the Inaglinskaya mine 2PK airway. It intersects the planned drifts of R&P-15−1-40, panels 15−1-2 and 15−1-3. Based on drilling results such D15 morphology disturbances were detected within the studied section of the mine field as folding, low-amplitude and no-amplitude faults, layer-by-layer movements and deformations in the host rocks and coal seams, flexure bends with up to 100 seam dip increase. Splitting and fault wash of the coal seam occur in some areas. Lowamplitude disturbances with amplitudes from 0.1 to 1.6 m are represented by faults, reverse faults and overthrust faults. Plicative disturbances cause local seam thickness increases. As a result of layer-by-layer movements the coal redistributed resulting in D15 swelling and pinching.

Grib N. N., Kolodeznikov I. I., Kachaev A. V., Grib G. V. Coalbed low-amplitude tectonic disturbance detection by horizontal directional drilling. MIAB. Mining Inf. Anal. Bull. 2023;(12-1):27—39. [In Russ]. DOI: 10.25018/0236_1493_2023_122_0_27.

Grib N. N., Dr. Sci. (Eng.), Professor, Deputy Director for Research, ORCID: https://orcid. org/0000−0001−9237−0292, NEFU Technical Institute Neryungri Branch, 16 Kravchenko Str., Neryungri, 678960, Russian Federation, e-mail: grib-n-n@yandex.ru, Scopus ID: 55769374800;
Kolodeznikov I. I., Dr. Sci. (Geol. Mineral.), Professor, Advisor to the President of the Academy of Sciences of the Republic of Sakha (Yakutia), 677007, 677007, 33 Lenin Str., Yakutsk, е-mail: i-i-kol@yandex.ru, Scopus ID: 347818;
Kachaev A. V., head of laboratory, NEFU Technical Institute Neryungri Branch, 16 Kravchenko Str., Neryungri, 678960, kachaev67@gmail.com, Scopus ID: 495217;
Grib G. V., Cand. Sci. (Geol. Mineral.), head of laboratory, NEFU Technical Institute Neryungri Branch, 16 Kravchenko Str., Neryungri, 678960, е-mail: grib-n-n@yandex.ru, Scopus ID: 880120.

Grib N. N., e-mail: grib-n-n@yandex.ru.

1. Bajkenzhina A. Zh. Detection and mapping of tectonic disturbances as indicators of outburst hazard zones by MOGT-3D method detailed prospecting in the conditions of the Qaraghandy coal basin. Izvestija Tomskogo politehnicheskogo universiteta [Izvestija TPU]. Inzhiniring georesursov. 2018. Vol. 329, No. 8. p. 145−155. http://earchive.tpu.ru/ handle/11683/50264. [In Russ].

2. Tailakov O. V., Sokolov S. V., Makeev M. P., Kormin A. N. Seismological survey of the coal fields based on the applying of the low-power sources of oscillation. 3rd International Innovative Mining Symposium, IIMS 2018. Article No. 01029. https://doi.org/10.1051/ e3sconf/20184101029.

3. Antsiferov A. V., Glukhov A. A., Antsiferov V. A. Mine seismic prediction of tectonic faults by reflected waves using the method of location. MIAB. Mining Inf. Anal. Bull. 2020;(6):131−139. [In Russ]. DOI: 10.25018/0236−1493−2020−6-0−131−139.

4. Gaysin R. M., Tsarikov A. Yu. Location of damage zones in coal seams by underground resistivity prospecting. MIAB. Mining Inf. Anal. Bull. 2019. No. 6. p. 19–26. [In Russ]. DOI: 10.25018/0236−1493−2019−06−0-19−26.

5. Ákos GYULAI, Mihály DOBRÓKA, Tamás ORMOS, Endre TURAI, and Tibor SAVARI. In-mine Geoelectric Investigations for Detecting Tectonic Disturbances in Coal Seam Structures. Acta Geophysica. 2013. Vol. 61, no. 5, Oct. pp. 1184−1195. https://doi. org/10.2478/s11600−013−0112−6.

6. Nan Wang, Zijian Wang, Qianhui Sun and Jian Hui. Coal Mine Goaf Interpretation: Survey, Passive Electromagnetic Methods and Case Study. Minerals 2023. 13 (3). 422. https://doi.org/10.3390/min13030422.

7. Pisarenko M. V., Tajlakov O. V., Sokolov S. V., Kolmakova A. A. About forecasting low amplitude disturbances of coal seams. Izvestija TulGU. Nauki o Zemle. 2022, No. 2, p. 356−366. [In Russ]. DOI 10.46689/2218−5194−2022−2-1−356−366.

8. Prykhodchenko V. F., Shashenko O. M., Sdvyzhkova O. O., Prykhodchenko, O. V., Pilyugin V. I. Predictability of a small-amplitude disturbance of coal seams in Western Donbas. Scientific Bulletin of National Mining University. 2020, Iss. 4, p. 24−29. DOI:10.33271/ nvngu/2020−4/024.

9. Shabel’nikov S. I. Prediction of low-amplitude tectonic fissures of coal seams in the conditions of underground mine workings in the preparation of panels. Forum gіrnikіv, 2013: materіali mіzhnarodnoi konferencii, 2−5 zhovtnja 2013. Dnіpropetrovs’k, 2013. Vol. 4. p. 32−37. http://ir.nmu.org.ua/handle/123456789/150154. [In Russ].

10. Shabel’nikov S. I. Prediction of low-amplitude tectonic ruptures of coal seams at mine workings drivage. Gornyj zhurnal. 2017, no. 12. p. 21−24. [In Russ]. DOI 10.17580/ gzh.2017.12.04 DOI 10.17580/gzh.2017.12.04.

11. Rodivilov D. B., Nezhdanov A. A., Shtol’ A. V. Identification of low-amplitude tectonic faults in the process of drilling horizontal wellbores in the interval of the Lower Berezovskaya subformation of the Medvezhye field (Western Siberia). Jekspozicija Neft’ Gaz. 2021, No. 2, p. 17–20. DOI: 10.24412/2076−6785−2021−2-17−20.

12. Malinnikova Olga, Uchaev Dmitry, Uchaev Denis and Malinnikov Vasiliy. The study of coal tectonic disturbance using multifractal analysis of coal specimen images obtained by means of scanning electron microscopy. E3S Web of Conferences. 2019. 129, 01017. 1st International Scientific Conference “Problems in Geomechanics of Highly Compressed Rock and Rock Massifs”: Volume 129. https://doi.org/10.1051/e3sconf /201912901017.

13. Kalinchenko V. M., Shurygin D. N., Efimov D. A. Prediction of small-amplitude disturbance of coal seams: monograph, Novocherkassk, JuRGPU (NPI), 2013, 131 p. [In Russ].

14. Tianshou Ma, Jinhua Liu, Jianhong Fu, Bisheng Wu. Drilling and completion technologies of coalbed methane exploitation: an overview. International Journal of Coal Science & Technology. 2022. no. 9. P. 27 of 31 https://doi.org/10.1007/s40789−022−00540-x.

15. Leśniak G., Brunner D. J., Topór T., Grzegorz, Słota-Valim M., Cicha-Szot R., Jura B., Skiba J., Przystolik A., Lyddall B., Grzegorz Plonka G. Application of long-reach directional drilling boreholes for gas drainage of adjacent seams in coal mines with severe geological conditions. International Journal of Coal Science & Technology. 2022. no. 9. 88. https://doi. org/10.1007/s40789−022−00553−6.

16. Gennadii Rout, Oleg Tailakov, Denis Zastrelov, Sergey Kolesnichenko. To the issue of monitoring the length of degasification boreholes. E3S Web of Conferences. 2021. 315, 01020. VIth International Innovative Mining Symposium. https://doi.org/10.1051/ e3sconf/202131501020.

17. Houben G. J., Collins S., Bakker M., Daffner T., Triller F. Review: Horizontal, directionally drilled and radial collector wells. Hydrogeol Journal 30, 329–357 (2022). https://doi.org/10.1007/s10040−021−02425-w.

18. Remezov A. V., Torro V. O. Development analysis of technology and methods for controlled drilling of degassing, vertical, slant and horizontal wells. Vestnik Nauchnogo centra VostNII po promyshlennoj i jekologicheskoj bezopasnosti. 2019, No.1, p. 53–74. [In Russ]. DOI: 10.25558/VOSTNII.2019.20.86.006.

19. Slastunov S. V., Sadov A. P., Khautiev A. M.-B., Komissarov I. A. The results of testing the technology of hydraulic fracturing of the coal seam through wells from the surface at the kirov mine. MIAB. Mining Inf. Anal. Bull. 2022, No. 11, p. 121–132. [In Russ]. DOI: 10.25018/0236_1493_2022_11_0_121.

20. Grib N. N., Kuznetsov P. Yu. Optimal density planning of exploratory wells network during pre-mining grade control drilling based on cluster arrangement of coal deposits. Ugol’. 2019, No. 4. p. 96−100. [In Russ]. DOI: http://dx.doi.org/10.18796/0041−5790−2019−492−96.