Analysis of the stress deformed state of rocks around the haulage roadway of the Beskempir field (Kazakhstan)
Abdrakhman Begalinov1, Talgat Almenov1, Raissa Zhanakova1, Bakytbek Bektur1
1Satbayev University, Almaty, 50013, Kazakhstan
Min. miner. depos. 2020, 14(3):28-36
Full text (PDF)
Purpose. To perform research and detailed analysis of the stress deformed state of rocks around the haulage roadway based on the numerical modeling with the purpose to select the rational type and design of the haulage roadway support at the Beskempir field.
Methods. A comprehensive research method has been used: review and generalization of references related to the study of the stress deformed state of a rock mass, improvement of the walling technology, in-situ and laboratory tests in the research and testing of rock samples strength; application of mathematical statistics and processing of experimental data using software products. The numerical modeling of the stress deformed state was done using the Examine 2D application with due account for the shape of broken rocks area, which is a 138х138х138 m regular triangle. Barton’s Q-system was used to the RQD assessment.
Findings. The numerical modeling of the stress deformed state of rocks in the tectonic fault zone of the haulage roadway at +230 m was performed, and the rock mass deformation zones were defined around the mine contours. The charts showing displacement of roof rocks and walls of the haulage roadway were built, where it was established that the maximum displacement was manifest over the tectonic fault zone. The following zones were identified: the rock mass instability zones, the rock mass instability zones with due account for its fracturing, the zones of stable and unstable rock masses of the haulage roadway. It was established that 41.6% of the working with the fault zone is unstable, and 58% of it is a more stable part. It is proposed to divide the haulage roadway into three sections depending on the rock stability with a certain type of support.
Originality.. Based on the study of the stress deformed state of the rock mass in the conditions of the Beskempir field, site-specific unstable sections were identified. They ensured the selection of the support design with adjustable resistance.
Practical implications. The application of support with adjustable resistance depending on the rock mass stability ensures minimization of costs for roadway support, maintenance of extensive sections of the working as well as enhanced mining safety in specific mining and geological conditions of the Beskempir field.
Keywords: stress deformed state, rock mass, support, fault zone, support design, construction, tectonic faults, underground workings
- Baibatsha, A. (2011). Geological models of formation and industrial types of gold deposits in kazakhstan. International Multidisciplinary Scientific Geoconference and EXPO – Modern Management of Mine Producing, Geology and Environmental Protection. (1), 133-138.https://doi.org/10.5593/sgem2011/s01.118
- Luzin, B.S. (2001). Mine “ABS-Balkhash”: The leader of gold mining in Kazakhstan. Gornyi Zhurnal, (11), 78-80.
- On Gold Mining in Kazakhstan: Particularities and Outlooks of Development. (2019). Retrieved fromhttps://prodragmetally.ru/
- Aiva. Gold Mining in Africa, Russia and Kazakhstan. (2019). Retrieved fromhttps://musthaveforyou.mediasole.ru/
- Luzin, B.S., & Golik, V.I. (2004). The prospects of gold mining development in Kazakhstan. Izvestiya Vysshikh Uchebnykh Zavedenij. Tsvetnaya Metallurgiya, (3), 11-16.
- Sagers, M.J. (1998). Gold production in Central Asia. Post-Soviet Geography and Economics, 39(3), 125-150.
- Haynes, P.E. (2008). A Eulogy for the Underground Workings of the Gold Hill Mine: Tooele County, Utah. Rocks & Minerals, 83(5), 451–456.https://doi.org/10.3200/rmin.83.5.451-456
- Tsvetkov, V.K., & Prikhod’ko, V.D. (1992). Rational shape of the cross section of an underground mine working. Journal of Mining Science, 28(2), 156-159.https://doi.org/10.1007/bf00710735
- Kolesnyk, V., Pavlychenko, A., Borysovs’ka, O., & Buchavyy, Y. (2018). Formation of Physic and Mechanical Composition of Dust Emission from the Ventilation Shaft of a Coal Mine as a Factor of Ecological Hazard. Solid State Phenomena, (277), 178-187.https://doi.org/10.4028/www.scientific.net/ssp.277.178
- Vladyko, O., Kononenko, M., & Khomenko, O. (2012). Imitating modeling stability of mine workings. Geomechanical Processes During Underground Mining, 147-150.https://doi.org/10.1201/b13157-26
- Zhdankin, N.A., & Kolokolov, S.B. (1989). Rational shape of a rock exposure in underground workings. Soviet Mining Science, 25(3), 248–252.https://doi.org/10.1007/bf02528483
- Majcherczyk, T., Małkowski, P., & Niedbalski, Z. (2008). Rock mass movements around development workings in various density of standing-and-roof-bolting support. Journal of Coal Science and Engineering (China), 14(3), 356-360.https://doi.org/10.1007/s12404-008-0078-1
- Project “Joint Development of Beskempir and Aksakal Mines” (Stage I). (2001). Astana, Kazakhstan: Production Association Ore Mining Company “ABC-Balkhash”.
- Begalinov, A.B., Serdaliyev, Ye.T., Almenov, T.M., Iskakov, Ye.Ye., Amanzholov, D.B., & Bakhramov, B.A. (2012). Enhancing the development of gold-bearing ore of Akbakay ore field. Mining Magazine of Kazakhstan, (12), 4-8.
- Borsch-Komponiets, V.I. (2013). Practical rock mechanics. Moscow, Russian Federation: Publishing House “Gornaya Kniga”.
- Makarov, A.B. (2006). Practical geomechanics. Moscow, Russian Federation: Publishing House “Gornaya Kniga”.
- Bukhartsev, N.B., & Volkov, Ye.N. (2013). Impact of faults on stress deformed state of a rock mass near the tunneling. Magazine of Civil Engineering, 4(39), 1-11.
- Fahimifar, A., Tehrani, F.M., Hedayat, A., & Vakilzadeh, A. (2010). Analytical solution for the excavation of circular tunnels in a visco-elastic Burger’s material under hydrostatic stress field. Tunnelling and Underground Space Technology, 25(4), 297-304.https://doi.org/10.1016/j.tust.2010.01.002
- Pankov, I.L. (2019). Theoretical assessment of natural stress state of rock masses in the conditions of tectonic impact. News of TulSU. Earth Sciences, (4), 292-304.
- Pankratenko, A.N., Pleshko, M.V., & Nasonov, A.A. (2017). Determining stress deformed state of a rock mass in the vicinity of the underground object with anchor-concrete support. Electronic Scientific Magazine “Don’s Engineering Bulletin”, (3), 1-13.
- Pleshko, M.S., Voynov, I.V., & Nasonov, A.A. (2017). Research of stress deformed state of underground objects’ lining in junction points. Electronic Scientific Magazine “Don’s Engineering Bulletin”, (3), 1-9.
- Begalinov, A.B., Serdaliyev, Ye.T., & Abakanov, A.T. (2013). Solving geomechanical tasks using ANSYS Software. Mining Magazine of Kazakhstan, (12), 13-18.
- Hoek, E., & Diederichs, M.S. (2006). Empirical estimation of rock mass modulus. International Journal of Rock Mechanics and Mining Sciences, 43(2), 203-215.https://doi.org/10.1016/j.ijrmms.2005.06.005
- Construction Norms and Rules II-94-80. (1980). Underground mine workings.
- Results of geotechnical surveys of rocks of the Akbakay Mining and Metallurgical Company. (2009). Order No. 302, No. 339, No. 78.
- Grimstad, E., & Barton, N. (1993). Updating of the Q-System for NMT. Proceedings of the International Symposium on Sprayed Concrete, 46-66.
- Grimstad, E., Kankes, K., Bhasin, R., Magnussen, A., & Kaynia, A. (2002). Rock mass quality q used in designing reinforced ribs of sprayed concrete and energy absorption. Proceedings of International Symposium on Sprayed Concrete, 134-142