Simulation study on fracture evolution and seepage characteristics of stratified coal under stress loading condition

doi:10.16265/j.cnki.issn1003-3033.2017.10.017

Abstract

Abstract: To explore the influence of bedding structure on the evolution of fracture in coal seam and gas seepage characteristics, and to optimize the design of gas extraction a simulation study was carried out on samples of coal different in bedding by using the RFPA^2D-Flow software. The results show that the all coal samples different in bedding end in shear failure but their final failure patterns have obvious difference are different from each other, that the simulation result of oblique bedding coal sample conforms basically to the test results, verifying the effectiveness of the simulation.

Key words: hierarchical structure, fissure evolution, seepage, acoustic emission, numerical simulation

CLC Number:

X936

LIU Jiajia, YANG Ming, ZHANG Junwei, WANG Dan. Simulation study on fracture evolution and seepage characteristics of stratified coal under stress loading condition[J]. China Safety Science Journal, 2017, 27(10): 99-104.

References

[1] 袁欣鹏,梁冰,孙维吉,等. 卸压煤层瓦斯抽采渗透率演化模型研究[J].中国安全科学学报,2016,26(2): 127-131.
YUAN Xinpeng, LIANG Bing, SUN Weiji, et al. Research on permeability evolution model for coal seam being drained by pressure relief [J]. China Safety Science Journal,2016,26(2): 127-131.
[2] 刘佳佳,王丹,王亮,等. 考虑Klinkenberg效应的瓦斯抽采流固耦合模型及其应用[J].中国安全科学学报, 2016,26(12): 92-97.
LIU Jiajia, WANG Dan, WANG Liang, et al. A coupled ﬁuid-solid model considering Klinkenberg eff ect for methane extraction and its application [J]. China Safety Science Journal,2016,26(12): 92-97.
[3] 张永利,曹竹,肖晓春,等. 温度作用下煤体裂隙演化规律数值模拟及声发射特性研究[J].力学与实践,2015,37(3): 350-354.
ZHANG Yongli, CAO Zhu, XIAO Xiaochun, et al. Numerical simulation and acoustic emission characteristics of the evolution of coal body fissures under different temperatures [J]. Mechanics in Engineering, 2015,37(3): 350-354.
[4] 张胜,田利军,肖鹏. 综放采场支承压力对覆岩裂隙发育规律的影响机理研究[J].矿业安全与环保,2011,38(6): 12-14.
[5] 王俭. 覆岩裂隙演化的RFPA数值模拟研究[J].煤炭技术,2014,33(6): 56-58.
WANG Jian. Numerical simulation research on cracks evolution of overburden strata by RFPA[J].Coal Technology, 2014,33(6): 56-58.
[6] 彭永伟,齐庆新,李宏艳,等. 煤体采动裂隙场演化与瓦斯渗流耦合数值模拟[J]. 辽宁工程技术大学学报:自然科学版,2009,28(增1): 229-231.
PENG Yongwei, QI Qingxin, LI Hongyan, et al. Numerical simulation study on evolution of mining-induced fractures field and gas seepage [J]. Journal of Liaoning Technical University:Natural Science,2009,28(S1): 229-231.
[7] 潘荣锟. 载荷煤体渗透率演化特性及在卸压瓦斯抽采中的应用[D].徐州:中国矿业大学,2014.
PAN Rongkun. The permeability evolution characteristics of loaded coal and its application in the drainage of pressure-relief gas[D]. Xuzhou: China University of Mining and Technology,2014.
[8] 刘延保. 基于细观力学试验的含瓦斯煤体变形破坏规律研究[D].重庆:重庆大学, 2009.
LIU Yanbao. Study on the deformation and damage rules of gas-filled coal based on meso-mechanical experiments[D]. Chongqing: Chongqing University, 2009.
[9] 田坤云,齐雷. 应力加卸载下层理裂隙煤体瓦斯渗流试验研究[J].中国安全科学学报,2017,27(1): 93-97.
TIAN Kunyun, QI Lei. Experimental study on seepage of gas from fractured coal under stress loading and unloading conditions [J]. China Safety Science Journal,2017,27(1): 93-97.
[10] 孙国文,罗甲渊,罗斌玉. 煤层层理对瓦斯渗流影响理论分析与实验研究[J]. 湖南科技大学学报:自然科学版,2017,32(1): 12-17.
SUN Guowen, LUO Jiayuan, LUO Binyu. Theory analysis and experimental study of the effect of coal seam on gas seepage [J].Journal of Hunan University of Science & Technology:Natural Science Edition,2017,32(1): 12-17.
[11] 邓博知,康向涛,李星,等.不同层理方向对原煤变形及渗流特性的影响[J].煤炭学报,2015,40(4): 888-894.
DENG Bozhi, KANG Xiangtao, LI Xing, et al. Effect of different bedding directions on coal deformation and permeability characteristics[J]. Journal of China Coal Society,2015,40(4): 888-894.

[1]	LI Gang, LIU Haizhen, YANG Qinghe, NIU Weifeng. Analysis on failure characteristics of coal seam floors and water inrush risks in mining under pressure [J]. China Safety Science Journal, 2022, 32(5): 68-76.
[2]	HE Xin, MA Yilong. Study on wake safety intervals of PA based on CFD [J]. China Safety Science Journal, 2022, 32(5): 77-83.
[3]	ZHENG Aichen, XIANG Jinyang, HUANG Feng, JIN Chenghao, LIU Xingchen. Test and simulation of influence of voids on tunnel structure safety [J]. China Safety Science Journal, 2022, 32(5): 119-126.
[4]	YOU Bo, MAO Cong, SHI Shiliang, LIU Heqing, LU Yi, LI Min. Research on change characteristics of environment in micro space of mine ventilation suits [J]. China Safety Science Journal, 2022, 32(5): 185-193.
[5]	WU Xuehai, LI Bobo, GAO Zheng, XU Jiang, FU Jiale. Influence mechanism of gas pressure reduction on coal deformation and seepage [J]. China Safety Science Journal, 2022, 32(4): 129-134.
[6]	FENG Gong, XIA Yuanyou, WANG Zhide, YAN Minjia. Dynamic early warning method of open-pit mine slopes based on integrated displacement information [J]. China Safety Science Journal, 2022, 32(3): 116-122.
[7]	LU Yi, YANG Fan, LIU Huan, CHEN Jian, WANG Jinpeng, LI Wenhui. Thermal resistance calculation of aerogel fire-fighting clothing lining [J]. China Safety Science Journal, 2022, 32(1): 201-207.
[8]	ZHANG Ran, LIU Jie, SA Zhanyou, CHENG Jianwei, LU Shouqing, WANG Chunyuan. Critical slowing down characteristics of acoustic emission of gas bearing coal under unloading conditions [J]. China Safety Science Journal, 2021, 31(9): 128-134.
[9]	ZHANG Junxiang, LIU Yanwei, REN Peiliang, HAN Hongkai, ZUO Weiqin. Optimization and experimental study of sealing parameters of crossing boreholes based on creep effect [J]. China Safety Science Journal, 2021, 31(7): 97-104.
[10]	DING Houcheng, LIAN Zhixu, DENG Quanlong, JIANG Zhongan, YANG Liwei, GE Mengyuan. Research on dust removal characteristics under synergistic action of vibrating wire grid and high-pressure spray [J]. China Safety Science Journal, 2021, 31(6): 106-112.
[11]	JING Deji, JIA Xin, ZHANG Tian, MENG Xiangxi, MA Mingxing, WANG Zhiheng. Numerical simulation and experimental study on vortex blowing and suction dedusting technology during coal falling [J]. China Safety Science Journal, 2021, 31(6): 121-127.
[12]	ZHU Haohao, GUO Hailin, ZHUMAKELDI A. Research on crack propagation of pipeline inner surface defect under external force [J]. China Safety Science Journal, 2021, 31(3): 66-72.
[13]	JIANG Xuepeng, CHEN Xin'ge, GUO Kun. Study on critical velocity of lateral point smoke extraction tunnel fire [J]. China Safety Science Journal, 2021, 31(3): 105-111.
[14]	WANG Liang, SUN Yimin, CHU Peng, ZHAO Wei, ZOU Shuangying. Study on accuracy of coal seam gas pressure measurement based on its spatial and temporal distribution characteristics [J]. China Safety Science Journal, 2021, 31(2): 40-47.
[15]	ZHANG Meng, LIU Honglei, QIAO Wenguang, GAO Xun. Significant research on influencing factors of dump stability [J]. China Safety Science Journal, 2021, 31(2): 69-75.