Piston mechanism of interaction of non-linear geomechanical and physicochemical gas exchange and mass transfer processes in coal-bearing rocks

Abstract

The article focuses on a theoretical and experimental framework for the quantification of interaction between nonlinear geomechnical and physicochemical processes in high-stress coal-bearing rock mass during mining under high seismic risk due to large-scale blasting and earthquakes, as well as because of structural and tem- perature effects. The tests were aimed to examine and study comprehensively the piston mechanism of gas ex- change and mass transfer processes, revealed recently at the Institute of Mining, SB RAS, as well as to explain the fact that the earthquake-induced low-velocity (quasi-meter range) pendulum waves (velocity to 1 m/s and fre- quency of 0.5-5 Hz) could stimulate an increase in the gas content in coal mines. In order to perform laboratory investigation at the Institute of Mining SB RAS, special-purpose stand for analyzing gas exchange and mass transfer processes in coal-bearing geomaterials under various thermodynamic conditions (P, V, T) and gas composition was constructed in cooperation with the Institute of Semiconductors Physics SB RAS. Matching of air flow rate with compression pressures allowed to obtain relations showing that air flow rate increases at the uncertain time interval under the increasing of the compression pressure. The same measurements was carried out with another gases such as Hydrogen H2, Helium He, methane CH4, carbon dioxide CO2 and carbon oxide CO. The laboratory tests aimed to detailed investigation of the previously revealed “piston mechanism” of gas exchange and mass transfer processes in the coal specimens and their quantitative description in terms of theory of the pendulum waves were carried in the first time. Consequently, there are some arguments for the testing of the opportunity of quantitative description of the “piston mechanism” related to gas exchange and mass transfer processes in the scale of coal mines. It is relevant when pendulum waves induced by powerful earthquakes and technical blasting reaches the mine.

Keywords

Coal-bearing rock mass / Non-linear geomechanical and physicochemical / gas exchange and mass transfer processes / Low-velocity pendulum waves / Gas-dynamic activity / Coal mines

References

[1] V.V. Adushkin, V.N. Oparin, From the alternating-sign explosion response of rocks to the pendulum waves in stressed media, J. of Mining Sci. P. I 48 (2) ( 2012) 203-222. P. II: 2013, Vol. 49, No. 2, pp. 175 209;P. III: 2014, Vol. 50, No. 4, pp.623 645; P. IV: 2016, Vol. 52, No. 1, pp. 1 35.

[2] V.N. Oparin, V.V. Adushkin, T.A. Kiryaeva, V.P. Potapov, V.G. Tyukhrin, A.V. Glumov, Effect of pendulum waves from earthquakes on gas-dynamic behavior of coal seams in Kuzbass, J. Min. Sci. 54 ( 2018) 3-14.

[3] V.N. Oparin, T.A. Kiryaeva, V. Yu Gavrilov, R.A. Shutilov, A.P. Kovchavtsev, A.S. Tanaino, V.P. Efimov, I.E. Astrakhantsev, I.V. Grenev, Interaction of geomechanical and physicochemical processes in Kuzbass coal, J. Min. Sci. 50 (2) ( 2014) 191-214.

[4] V.N. Oparin, T.A. Kiryaeva, O.M. Usol’tseva, P.A. Tsoi, V.N. Semenov, Nonlinear deformation-wave processes in various rank coal specimens loaded to failure under varied temperature, J. Min. Sci. 51 (4) ( 2015) 641-658.

[5] V.N. Oparin, V.V. Adushkin, T.A. Kiryaeva, V.P. Tyukhrin V.G. Potapov, A.V. Glumov, Effect of pendulum waves from earthquakes on gas-dynamic behavior of coal seams in Kuzbass, J. Min. Sci. 54 ( 2018) 3-14.

[6] V.N. Oparin, Тheoretical fundamentals to describe interaction of geomechanical and physicochemical processes in coal seams, J. Min. Sci. 53 (2) ( 2017) 201-215.

[7] V.N. Oparin, T.A. Kiryaeva, V.P. Potapov, V.F. Yushkin, New methods and information technologies in the experimental geomechanics, Publishing house of SB RAS, Novosibirsk, 2021, p. 292.

[8] V.N. Oparin, T.A. Kiryaeva, Operator of connection between the Langmuir equation and Oparin's kinematic equation for pendulum-type waves. Part I, in: D. B. Solovev, V.V. Savaley, A.T. Bekker, V.I. Petukhov ( Proceeding of the International Science and Technology Conference "FarEastСon Eds.), 2021, Smart Innovation, Systems and Technologies, vol. 275, Springer, Singapore, 2022, https://doi.org/10.1007/978-981-16-8829-4_1.

[9] V.N. Oparin, T.A. Kiryaeva, Operator of connection between the Langmuir equation and Oparin's kinematic equation for pendulum-type waves. Part II, in: D. B. Solovev, V.V. Savaley, A.T. Bekker, V.I. Petukhov ( Proceeding of the international science and technology conference "FarEastСon Eds.), 2021, Smart Innovation, Systems and Technologies, vol. 275, Springer, Singapore, 2022, https://doi.org/10.1007/978-981-16-8829-4_2.

[10] V.N. Oparin, T.A. Kiryaeva, Operator of connection between the Langmuir equation and Oparin's kinematic equation for pendulum-type waves. Part III,in: D. B. Solovev, V.V. Savaley, A.T. Bekker, V.I. Petukhov ( Proceeding of the International Science and Technology Conference "FarEastСon Eds.), 2021, Smart Innovation, Systems and Technologies, vol. 275, Springer, Singapore, 2022, https://doi.org/10.1007/978-981-16-8829-4_3.

[11] N.N. Melnikov ( Ed.), Geomechanical fields and processes: experimental and analytical studies of the formation and development of focal zones of catastrophic events in mining and natural systems, Novosibirsk, vol. 1, Izd-vo SO RAN, 2018, p. 549, 2. 2019, 543.

[12] Kiryaeva T. A., Oparin V. N. RF Database registration certification No. 2018620264 catalog of methane content of coal in Kuzbass. Dated December 13, 2018.

[13] T.A. Kiryaeva, Methods of energy analysis and prediction of gas-dynamics in coal- and-methane coal seams in Kuzbass, LAPLAMBERT Academic Publishing, Riga, 2019, p. 332.

[14] T.A. Kiryaeva, V.N. Oparin, D.A. Yatsenko, Micro and nano structure analysis of coal substance versus coal rank, Mining Info. Anal. Bull.—GIAB 5 ( 2021) 5-23.

[15] D. Wu, H. Zhang, G. Hu, W. Zhang, Fine characterization of the macromolecular structure of Huainan coal using XRD, FTIR, 13C-CP/MAS NMR, SEM and AFM techniques, Molecules 25 (11) ( 2020) 2661.

[16] Jingchong Yan, Zhiping Lei, Zhanku Li, Zhicai Wang, Shibiao Ren, Shigang Kang, Xiaoling Wang, Hengfu Shui, Molecular structure characterization of low-medium rank coals via XRD, solid state 13C NMR and FTIR spectroscopy, Fuel 268 ( 2020), 117038.

[17] Yankun Xiong, Lijun Jin, Yang He, Li Yang, Haoquan Hu, Insight into the aromatic ring structures of a low-rank coal by step-wise oxidation degradation, Fuel Process. Technol. 210 ( 2020), 106563.

[18] Kaizhong Zhang, Yuanping Cheng, Wei Li, Congmeng Hao, Biao Hu, Jingyu Jiang, Microcrystalline characterization and morphological structure of tectonic anthracite using XRD, Liquid Nitrogen Adsorption, Mercury Porosimetry and Micro- CT, Energy & Fuels 33 (11) ( 2019) 10844-10851.

[19] Junqing Meng, Shichao Li, Jiaxing Niu, Crystallite structure characteristics and its influence on methane adsorption for different rank coals, ACS Omega 4 (24) ( 2019) 20762-20772.

[20] Yu Liu, Yanming Zhu, Shangbin Chen,Effects of chemical composition, disorder degree and crystallite structure of coal macromolecule on nanopores (0.4-150 nm) in different rank naturally-matured coals, Fuel 242 ( 2019) 553-561.

[21] Jingyu Jiang, Weihua Yang, Yuanping Cheng, Zhengdong Liu, Qiang Zhang, Ke Zhao, Molecular structure characterization of middle-high rank coal via XRD, Raman and FTIR spectroscopy: implications for coalification, Fuel 239 ( 2019) 559-572.

[22] Rong-Kun Pan, Cong Li, Ming-Gao Yu, Ze-Jun Xiao, Fu Dong, Evolution patterns of coal micro-structure in environments with different temperatures and oxygen conditions, Fuel 261 ( 2020), 116425.

[23] V.N. Oparin, T.A. Kiryaeva, V.G. Potapov, V.F. Yushkin,New methods and information technologies in the experimental geomechanics, SB RAS Publ., - Novosibirsk, 2021, p. 292, https://doi.org/10.53954/9785604642856.