VNIMI’s Division in Kemerovo, Kemerovo, Russia:

P. V. Grechishkin, Director, Candidate of Engineering Sciences, pv_grechishkin@mail.ru

NUST MISIS’s College of Mining, Moscow, Russia:

S. A. Malova, Training and Guidance Specialist

Experience of construction and operation of deep mines proves the necessity of making deep-level openings in the strongest rocks, mainly, in sandstone, limestone and dolomite. However, such rocks at a depth of 800 m and deeper are the most rockburst-hazardous. Rock outbursts impair safety of mining, and lead to deceleration and appreciation of production processes. The study into the failure-causing residual stresses in rockburst-hazardous rocks is performed. The direct tests of the residual stresses in rockburst-hazardous sandstone make it possible to state the absence of such stresses and, thus, the absence of the residual tectonic stresses in such rocks. The petrographic research proves the essential and crucial role of diagenesis when physicochemical transformations of rocks are assessed. These transformations reinforce the conclusion on the absence of the residual tectonic stresses in rockburst-hazardous sandstone in Donbass. The main cause of the anomalous stress zones is the high-pressure gas (methane) in rocks. The internal stresses to add the gravitational stresses are governed by the swelling property of sandstone when saturated with methane and by the degree of “constraint” of this swelling. The main cause of failure in a high-stress rock mass is the transition of a brittle material from the volumetric compression to the complex stress state when there are the conditions for the elastic recovery deformation, i.e. tensile deformation. Failure is possible when the latter reaches the ultimate values. The cause of the stress redistribution is the instantaneous separation of a part of the high-stress rock mass during blasting.

1. Nesterov K. V., Kuzenkov M. V. Expanding Kola MMC’S resource base. Tsvetnye Metally. 2019. No. 11. pp. 16–22. DOI: 10.17580/tsm.2019.11.01
2. Vasyuchkov Yu. F., Melnik V. V. Heating coal massif from the channel of underground gasification. Eurasian Mining. 2018. No. 2. pp. 3–7. DOI: 10.17580/em.2018.02.01
3. Shevyreva N. Yu., Shevyrev Yu. V., Bobokin G. I. The use of frequency converter and active rectifier of voltage for the power quality improvement in coal longwalls. Eurasian Mining. 2022. No. 1. pp. 80–84. DOI: 10.17580/em.2022.01.17
4. Yuxuan Jin, Ze Liu, Le Han, Yanbo Zhang, Li Li et al. Synthesis of coal-analcime composite from coal gangue and its adsorption performance on heavy metal ions. Journal of Hazardous Materials. 2022. Vol. 423. 127027. DOI: 10.1016/j.jhazmat.2021.127027
5. Kuznetsov V. D., Bolshanina M. A. Physics of solids. Tomsk : Krasnoe znamya, 1941. Vol. II. 772 p.
6. Baryakh A. A., Andreiko S. S., Fedoseev A. K. Gas-dynamic roof fall during the potash deposits development. Journal of Mining Institute. 2020. Vol. 246. pp. 601–609.
7. Bobrov I. V. Safe development heading methods for rock and gas ourburst-hazardous strata. Moscow : Gosgortekhizdat, 1961. 264 p.
8. Pozin E. Z. Effect of face slip on cuttability of coal. Failure Resistance of Rocks in Mining: Conference Proceedings. Moscow : Izdatelstvo AN SSSR, 1962. pp. 53–68.
9. Vyunikov A. A., Vorozhtsov S. G., Pul E. K., Khoyutanova N. V. Prevention of rock and gas outbursts in superdeep-level mining in Internatsionalny Mine of ALROSA. Gornyi Zhurnal. 2022. No. 1. pp. 85–89. DOI: 10.17580/gzh.2022.01.15
10. Slobodov M. A. Destressing method in deep-level stress research : A case-study. Ugol. 1958. No. 7. pp. 30–35.
11. Shadrin M. A., Sidorov D. V., Kornaushenko A. P., Mulev S. N. Modern geomechanical assessment of influence of rockbursts in tectonic areas on mine stability in the North Urals Bauxite Mine. Gornyi Zhurnal. 2022. No. 1. pp. 4–11. DOI: 10.17580/gzh.2022.01.01
12. Nikolin V. I. The existence of first-order residual stresses in sandstones prone to rock bursts. Soviet Mining. 1965. Vol. 1, Iss. 4. pp. 322–325.
13. Kui Gao, Ping Huang, Zegong Liu, Jian Liu, ChiMin Shu et al. Coal–rock damage characteristics caused by blasting within a reverse fault and its resultant effects on coal and gas outburst. Scientific Reports. 2021. Vol. 11. 191158. DOI: 10.1038/s41598-021-98581-w
14. Galushko P. Ya. Nature of rock outbursts in Shcheglovskaya-Glubokaya mine. Ugol Ukrainy. 1964. No. 2. pp. 46–47.
15. Obert L. In situ deterination of stress in rock. Mining Engineering. 1962. No. 8. pp. 51–58.
16. Lebedev N. N. Temperature stresses in elasticity. Leningrad : ONTI, 1937. 110 p.
17. Bin Zhou, Jiang Xu, Fazhi Yan, Shoujian Peng, Yabin Gao et al. Effects of gas pressure on dynamic response of two-phase flow for coal–gas outburst. Powder Tecnology. 2021. Vol. 377. pp. 55–69.
18. Kuznetsov G. N. Mechanical properties of rocks. Moscow : Ugletekhizdat, 1947. 180 p.
19. Bin Zhou, Jiang Xu, Shoujian Peng, Fazhi Yan, Wei Yang et al. Experiment al Analysi s of the Dynamic Effects of Coal–Gas Outburst and a Protean Contraction and Expansion Flow Model. Natural Resources Research. 2020. Vol. 29, No. 3. pp. 1617–1637.