不同动载对煤岩块的破坏作用数值模拟
Numerical simulation of failure of coal and rock blocks under different dynamic loads
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摘要: 以HJC本构模型进行数值模拟,分析动载作用下煤岩块的应力场、应变场及能量场动态变化过程。结果表明:载荷变化率的改变对煤岩块的破坏形态影响最大,其次是载荷的最大压力值,最后是作用时间;5种载荷压力形式下,煤岩块的动能、内能和总能量3种能量随时间变化趋势一致;煤岩块未破坏时,3种能量随时间增加;煤岩块发生破坏时,动能最终降为0,内能有所降低;煤岩块破坏越严重,3种能量降低的程度越大。煤岩块达到临界应力时只是发生轻微破坏,随后达到最大总能量时才发生严重破坏。压力和作用时间达到一定值时煤岩块才发生破坏,载荷变化率方向的改变增大了煤岩块的破坏能力。Abstract: The numerical simulation of HJC constitutive model is carried out to analyze the dynamic changes of the stress field, strain field and energy field of coal and rock mass under dynamic loading process. The results show that the change of load change rate has the greatest influence on the failure mode of coal and rock mass, followed by the maximum pressure value of the load, and finally the action time. Under the five kinds of load pressures, the kinetic energy, internal energy and total energy of coal and rock mass are consistent with time. When coal and rock mass is not destroyed, these three kinds of energy increase with time. When coal and rock mass is destroyed, the kinetic energy is finally reduced to zero, and the internal energy is reduced. The more severe coal and rock mass damage, the greater the reduction of the three types of energy. When coal and rock mass reaches the critical stress, only minor damage occurs, and then the maximum damage is reached when the maximum total energy is reached. When the pressure and the action time reach a certain value, coal and rock mass will be destroyed, and the change of the load change rate will increase the damage capacity of coal and rock mass.
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Keywords:
- HJC /
- coal and rock mass /
- dynamic load /
- load change rate /
- energy /
- dynamic diaster /
- deformation of surrounding rock
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[1] 王登科,刘淑敏,魏建平,等.冲击载荷作用下煤的破坏特性试验研究[J].采矿与安全工程学报,2017,34(3):594-600. WANG Dengke, LIU Shumin, WEI Jianping, et al. The failure characteristics of coal under impact load in laboratory[J]. Journal of Mining & Safety Engineering, 2017, 34(3): 594-600.
[2] 孙晓元.受载煤体振动破坏特征及致灾机理研究[D].北京:中国矿业大学(北京),2016:3-9. [3] Iannacchione A T, Tadolini S C. Occurrence, predication, and control of coal burst events in the U.S.[J]. International Journal of Mining Science and Technology, 2016, 26(1): 39-46. [4] 金解放,李夕兵,殷志强,等.轴压和循环冲击次数对砂岩动态力学特性的影响[J].煤炭学报,2012,37(6):923-930. JIN Jiefang, LI Xibing, YIN Zhiqiang, et al. Effects of axial pressure and number of cyclic impacts on dynamic mechanical characteristics of sandston[J]. Journal of China Coal Society, 2012, 37(6):923-930.
[5] 左宇军,李夕兵,张义平.动静组合加载下的岩石破坏特性[M].北京:冶金工业出版社,2008:2-8. [6] 王盛川.采动动载诱导围岩变形破坏的模拟试验研究[D].徐州:中国矿业大学,2017:23-29. [7] 刘少虹,毛德兵,齐庆新,等.动静加载下组合煤岩的应力波传播机制与能量耗散[J].煤炭学报,2014(S1):15-22. LIU Shaohong, MAO Debing, QI Qingxin, et al. Under static loading stress wave propagation mechanism and energy dissipation in compound coal-rock[J]. Journal of China Coal Society, 2014(S1):15-22.
[8] 窦林名,何学秋,Ren T,等.动静载叠加诱发煤岩瓦斯动力灾害原理及防治技术[J].中国矿业大学学报,2018(1):48-59. DOU Linming, HE Xueqiu, Ren T, et al. Mechanism of coal-gas dynamic disasters caused by the superposition of static and dynamic loads and its control technology[J]. Journal of China University of Mining & Technology, 2018(1): 48-59.
[9] 王恩元,刘晓斐,何学秋,等.煤岩动力灾害声电协同监测技术及预警应用[J].中国矿业大学学报,2018(5):1-6. WANG Enyuan, LIU Xiaofei, HE Xueqiu, et al. Acoustic emission and electromagnetic radiation synchronized monitoring technology and early-warning application for coal and rock dynamic disaster[J]. Journal of China University of Mining & Technology, 2018(5): 1-6.
[10] 高文蛟,单仁亮,苏永强.无烟煤单轴冲击动态强度理论[J].爆炸与冲击,2013,33(3):297-302. GAO Wenjiao, SHAN Renliang, SU Yongqiang. Theoretical research on dynamic strength of anthracite under uniaxialimpact[J]. Explosion and Shock Waves, 2013, 33(3): 297-302.
[11] YUAN Pu, MA Qinyong, MA Dongdong. Stress uniformity analyses on nonparallel end-surface rock specimen during loading process in SHPB tests[J]. Advances in Civil Engineering, 2018, 2018: 12. [12] 李峰,方书昊,毕明鑫,等.煤岩体在动载下的动态损伤数值模拟[J].煤炭技术,2017(11):167-169. LI Feng, FANG Shuhao, BI Mingxin, et al. Numerical simulation of dynamic damage of coal and rock mass under dynamic load[J]. Coal Technology, 2017(11):167-169.
[13] 钱杰,韩靖,胡鸣.基于ABAQUS的煤岩动态拉伸力学特性研究[J].煤矿安全,2017,48(8):20-22. QIAN Jie, HAN Jing, HU ming. Study on dynamic mechanical properties oof coal and rock based on ABAQUS simulation[J]. Safety in Coal Mines, 2017, 48(8):20-22.
[14] 李成武,王金贵,解北京,等.基于 HJC 本构模型的煤岩 SHPB 实验数值模拟[J].采矿与安全工程学报,2016,33(1):158-164. LI Chengwu, WANG Jingui, XIU Beijing, et al. Numerical simulation of SHPB tests for coal by using HJC model[J]. Journal of Mining & Safety Engineering, 2016, 33(1): 158-164.
[15] 严欢,李树刚,丁洋,等.煤岩材料变形过程位移场演化研究[J].煤矿安全,2019,50(11):38-42. YAN Huan, LI Shugang, DING Yang, et al. Displacement field evolution in deformation process of coal and rock materials[J]. Safety in Coal Mines, 2019, 50(11): 38-42.
[16] 何江.煤矿采动动载对煤岩体的作用及诱冲机理研究[D].北京:中国矿业大学(北京),2013:43-49. [17] 任根茂,吴昊,方秦,等.普通混凝土HJC本构模型参数确定[J].振动与冲击,2016,35(18):9-16. REN Genmao, WU Hao, FANG Qin, et al. Determinations of HJC constitutive model parameters for normal strength concrete[J]. Journal of Vibration and Shock, 2016, 35(18): 9-16.
[18] 张秀辉,胡仁喜,康士延,等.ansys 14.0有限元分析从入门到精通[M].北京:机械工业出版社,2013. [19] 李峰,方书昊,田静,等.动载应变率对煤岩块损伤的模拟研究[J].煤矿安全,2018,49(5):218-221. LI Feng, FANG Shuhao, TIAN Jing, et al. Simulation study on damage of coal and rock mass by dynamic load strain rate[J]. Safety in Coal Mines, 2018, 49(5): 218-221.
[20] 解北京,赵泽明,徐晓萌,等.含瓦斯煤锤击破坏HJC本构模型及数值模拟[J].煤炭学报,2018,43(10):2789-2799. XIE Beijing, ZHAO Zeming, XU Xiaomeng, et al. HJC constitutive model and numerical simulation of hammer damage with gas-containing coal[J]. Journal of China Coal Society, 2018, 43(10): 2789-2799.
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