Peculiarities of kinematics of rock mass shear during development of subseismic-scale faults
- 1 — Donetsk National Technical University
- 2 — Research Mining Institute
Abstract
The article describes the mechanism of formation and development of subseismic-scale faults in sedimentary rock mass based on results of physical and mathematical simulation. Physical modelling of layered rock massif was carried out by using sand-gypsum mixture. The results of physical modeling made it possible to visually evaluate the process of formation and development of subseismic-scale faults, to establish the orientation and amplitude of the modeled faults. It was established that faults with higher amplitude had filler material formed because of friction of fault edges/walls. The volume of modelled formation after formation of faults depending on fault amplitudes changed from 2-3 to 10 %. To gain information on stress deformed condition of rock massif and identification of key peculiarities of fault propagation dynamics we used the mathematical modeling based on particle-flow algorithm. The results of mathematical modeling determined that during formation of low amplitude faults the shear field has several rock clusters. Due to interaction of clusters, which have coordinated movement and promote massif loosening, the rock mass accumulates voids, which are the prerequisite for formation of subseismic-scale faults. The gained results enable to specify the complex mechanism of irreversible shears and deformations of rock mass during formation and development of subseismic-scale faults. It contributes to the improvement of the methodology for predicting the SSF parameters, which is of practical importance in terms of reducing mining risks.
References
- Гзовский М.В. Основы тектонофизики. М.: Недра, 1978. 536 c.
- Глухов А.А. Метод определения типа и параметров малоамплитудной тектонической нарушенности угольного пласта / А.А.Глухов, А.В.Анциферов // Проблемы горного давления. 2001. № 5. С. 106-113.
- Грабер Н.С. Разрывные нарушения угольных пластов / Н.С.Грабер, В.Е.Григорьев, Ю.Н.Дупак. Л.: Недра, 1979. 190 с.
- Корчемагин В.А. К методике выделения и реконструкции наложенных полей напряжений / В.А.Корчемагин, В.С.Емец // ДАН СССР. 1982. Т. 263. № 1. С. 163-168.
- Халимендик Ю.М. Исследование закономерностей вывалообразований в очистных забоях угольных шахт / Ю.М.Халимендик, А.В.Бруй, М.В.Чемакина // Записки Горного института. 2010. Т.188. С.70-73.
- Цирель С.В. Дилaтансия в разрушенных породах // Записки Горного института. 2011. Т.190. С.172-176.
- Azad Sağlam Selçuk. Geology of the Çaldıran Fault, Eastern Turkey: Age, slip rate and implications on the characteristic slip behavior / Azad Sağlam Selçuk, M.Korhan Erturaç, Sebastien Nomade // Tectonophysics. 2016. Vol. 680. P.155-173.
- Hazeghian M. Numerical modeling of dip-slip faulting through granular soils using DEM / M.Hazeghian, A.Soroush // Soil Dynamics and Earthquake Engineering. 2017. Vol. 97. P.155-171.
- Jun Cai. Substratum transverse faults in Kuqa Foreland Basin, northwest China and their significance in petroleum geology / Jun Cai, Xiuxiang Lü // Journal of Asian Earth Sciences. 2015.Vol.107. P.72-82.
- Relationship between joint development in rock and coal seams in the southeastern margin of the Ordos basin Original Research Article/ Linlin Wang, Bo Jiang, Jilin Wang, Zhenghui Qu, Pei Li, Jiegang Liu // International Journal of Mining Science and Technology. 2014. Vol.24. Iss.2. P.219-227.
- SHI Xiaojuan. Operational state monitoring and fuzzy fault diagnostic system of mine drainage // Mining Science and Technology. 2010. Vol.20. Iss.4. P.581-584.
- Stress spatial evolution law and rockburst danger induced by coal mining in fault zone / Li T., Mu Z., Liu G., Du J., Lu H. // International Journal of Mining Science and Technology. 2016. Vol.26(3). P.409-415.
- Stefano Tavani. High precision analysis of an embryonic extensional fault-related fold using 3D orthorectified virtual outcrops: The viewpoint importance in structural geology/ Stefano Tavani, Amerigo Corradetti, Andrea Billi // Journal of Structural Geology. 2016. Vol.86. P.200-210.