Experimental study on freeze-thaw damage and seepage characteristics of coal rock at different prefabrication temperatures

Qi Xiaoghan; Liu Yang; Yang Xuesong; Zhu Tongguang; Wang Pin; Hou Shuangrong

doi:10.19606/j.cnki.jmst.2023.04.004

Volume 8 Issue 4

Aug. 2023

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Article Navigation > Journal of Mining Science and Technology > 2023 > 8(4): 474-486

Qi Xiaoghan, Liu Yang, Yang Xuesong, Zhu Tongguang, Wang Pin, Hou Shuangrong. Experimental study on freeze-thaw damage and seepage characteristics of coal rock at different prefabrication temperatures[J]. Journal of Mining Science and Technology, 2023, 8(4): 474-486. doi: 10.19606/j.cnki.jmst.2023.04.004

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Experimental study on freeze-thaw damage and seepage characteristics of coal rock at different prefabrication temperatures

doi: 10.19606/j.cnki.jmst.2023.04.004

College of Safety Science and Engineering, Liaoning Technical University, Huludao Liaoning 125105, China

Received Date: 2022-10-20
Rev Recd Date: 2023-02-10
Publish Date: 2023-08-31

Abstract

Abstract

This experimental study probes into the evolution patterns of fine damage and mechanical and seepage characteristics of coal rocks using the coal rock triaxial servo experiment system by employing three types of pretreatment methods, namely heating, freeze-thawing with liquid nitrogen and freeze-thawing with water, with an aim to investigate the effect of temperature on freeze-thaw damage and seepage characteristics of coal rocks.Results show that higher preheating temperature leads to more severe structural damage, damage to water-filled liquid nitrogen freeze-thawed coal samples at the same temperature is greater than that of liquid nitrogen freeze-thawed coal samples and heated coal samples only, the degree of damage is negatively correlated with the wave speed and positively correlated with the number of joint dimensions of the end face damage; coal samples with high triaxial compressive strength feature low pre-deformation under different pretreatment methods; all three pre-treatment methods lead to an increase in the number of internal pores and fractures in the coal sample, resulting in the formation of a network of fractures.Freezing and thawing the coal sample with warmed water and liquid nitrogen demonstrate more stronger effect than that of freezing and thawing with warmed liquid nitrogen only.Therefore, in engineering practice, preheating-water injection-liquid nitrogen injection freeze-thaw could be employed to achieve efficient coal seam penetration and improve the effect of gas extraction.
- liquid nitrogen freezing and thawing,
- triaxial loading,
- a closer look damage,
- seepage,
- translucency

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References

[1]	李勇, 胡海涛, 王延斌, 等. 煤层气井低产原因及二次改造技术应用分析[J]. 矿业科学学报, 2022, 7(1): 55-70. doi: 10.19606/j.cnki.jmst.2022.01.006 Li Yong, Hu Haitao, Wang Yanbin, et al. Analysis of low production coalbed methane wells and application of secondary reconstruction technologies[J]. Journal of Mining Science and Technology, 2022, 7(1): 55-70. doi: 10.19606/j.cnki.jmst.2022.01.006
[2]	武世亮. 冻融对煤体损伤及瓦斯放散影响实验研究[D]. 徐州: 中国矿业大学, 2017.
[3]	Winkler E M. Frost damage to stone and concrete: geological considerations[J]. Engineering Geology, 1968, 2(5): 315-323. doi: 10.1016/0013-7952(68)90010-0
[4]	黄路云. 低温循环冷冻作用下岩石损伤试验与机理研究[D]. 武汉: 湖北工业大学, 2020.
[5]	苏善杰. 低渗煤体液氮致裂作用与增透机理研究[D]. 徐州: 中国矿业大学, 2021.
[6]	楚亚培. 液氮冻融煤体孔隙裂隙结构损伤演化规律及增渗机制研究[D]. 重庆: 重庆大学, 2020.
[7]	常铎. 冻融循环条件下煤体致裂影响因素与机理研究[D]. 焦作: 河南理工大学, 2020.
[8]	Wei J P, Zhang L L, Li B, et al. Non-uniformity of coal damage caused by liquid nitrogen freeze-thaw[J]. Journal of Natural Gas Science and Engineering, 2019, 69: 102946. doi: 10.1016/j.jngse.2019.102946
[9]	Li B, Shi Z, Wang Z Q, et al. Effect of liquid nitrogen freeze-thaw cycles on pore structure development and mechanical properties of coal[J]. ACS Omega, 2022, 7(6): 5206-5216. doi: 10.1021/acsomega.1c06296
[10]	史宏财. 高温预损伤下煤岩蠕变声发射及分形特征[J]. 煤田地质与勘探, 2020, 48(2): 187-194. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT202002028.htm Shi Hongcai. Creep acoustic emission and fractal characteristics of coal rock under high temperature pre-damage[J]. Coal Geology & Exploration, 2020, 48(2): 187-194. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT202002028.htm
[11]	王勇, 孟巧荣, 高力, 等. 热解无烟煤微细观孔裂隙结构随温度的演化规律[J]. 煤炭学报, 2020, 45(S1): 300-307. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB2020S1032.htm Wang Yong, Meng Qiaorong, Gao Li, et al. Evolution law of micro-meso pore-fracture structure of anthracite in pyrolysis[J]. Journal of China Coal Society, 2020, 45(S1): 300-307. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB2020S1032.htm
[12]	Richter D, Simmons G. Thermal expansion behavior of igneous rocks[J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1974(11): 403-411.
[13]	齐消寒, 马恒, 王晓琪, 等. 热冲击对煤岩细观损伤及力学特性影响研究[J]. 中国安全科学学报, 2020, 30(12): 85-92. https://www.cnki.com.cn/Article/CJFDTOTAL-ZAQK202012012.htm Qi Xiaohan, Ma Heng, Wang Xiaoqi, et al. Impacts of thermal shocks on meso-damage and mechanical properties of coal[J]. China Safety Science Journal, 2020, 30(12): 85-92. https://www.cnki.com.cn/Article/CJFDTOTAL-ZAQK202012012.htm
[14]	马占国, 茅献彪, 李玉寿, 等. 温度对煤力学特性影响的实验研究[J]. 矿山压力与顶板管理, 2005, 22(3): 46-48. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL200503018.htm Ma Zhanguo, Mao Xianbiao, Li Yushou, et al. Experimental study on the influence of temperature on coal mechanical properties[J]. Ground Pressure and Strata Control, 2005, 22(3): 46-48. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL200503018.htm
[15]	姜波, 秦勇, 金法礼. 煤变形的高温高压实验研究[J]. 煤炭学报, 1997, 22(1): 80-84. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB701.016.htm Jiang Bo, Qin Yong, Jin Fali. Coal deformation test under high temperature and confining pressure[J]. Journal of China Coal Society, 1997, 22(1): 80-84. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB701.016.htm
[16]	许江, 张丹丹, 彭守建, 等. 温度对含瓦斯煤力学性质影响的试验研究[J]. 岩石力学与工程学报, 2011, 30(S1): 2730-2735. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2011S1018.htm Xu Jiang, Zhang Dandan, Peng Shoujian, et al. Experimental research on influence of temperature on mechanical properties of coal containing methane[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S1): 2730-2735. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2011S1018.htm
[17]	李智威. 煤体热损伤裂隙发育及渗流特性研究[D]. 徐州: 中国矿业大学, 2018.
[18]	王伟, 张村, 吴山西, 等. 垮落带破碎煤岩样循环加卸载渗流特征实验研究[J]. 矿业科学学报, 2020, 5(4): 374-381. http://kykxxb.cumtb.edu.cn/article/id/301 Wang Wei, Zhang Cun, Wu Shanxi, et al. Experinmental study on seepage characterisics of broken coal and rock samples in caving zone under cyclic loading and unloading[J]. Journal of Mining Science and Technology, 2020, 5(4): 374-381. http://kykxxb.cumtb.edu.cn/article/id/301
[19]	王凯, 赵恩彪, 郭阳阳, 等. 中间主应力影响下含瓦斯复合煤岩体变形渗流及能量演化特征研究[J]. 矿业科学学报, 2023, 8(1): 74-82. doi: 10.19606/j.cnki.jmst.2023.01.007 Wang Kai, Zhao Enbiao, Guo Yangyang, et al. Deformation, seepage and energy evolution characteristics of gas-bearing coal-rock under intermediate principal stress[J]. Journal of Mining Science and Technology, 2023, 8(1): 74-82. doi: 10.19606/j.cnki.jmst.2023.01.007
[20]	徐超, 秦亮亮, 李晓敏, 等. 加卸载煤体损伤-渗透特性影响因素实验研究[J]. 矿业科学学报, 2021, 6(3): 280-289. doi: 10.19606/j.cnki.jmst.2021.03.004 Xu Chao, Qin Liangliang, Li Xiaomin, et al. Experimental study on influence factors in damage-permeability characteristics of loading and unloading coal[J]. Journal of Mining Science and Technology, 2021, 6(3): 280-289. doi: 10.19606/j.cnki.jmst.2021.03.004
[21]	郝宪杰, 袁亮, 王飞, 等. 三轴压缩煤样破坏规律及剪切强度参数的反演[J]. 中国矿业大学学报, 2017, 46(4): 730-738. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201704005.htm Hao Xianjie, Yuan Liang, Wang Fei, et al. Analysis of failure of coal under tri-axial compression and inversion of its shear strength parameters[J]. Journal of China University of Mining & Technology, 2017, 46(4): 730-738. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201704005.htm

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Experimental study on freeze-thaw damage and seepage characteristics of coal rock at different prefabrication temperatures

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