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| Experimental study on impact failure characteristics of coal and rock based on SHPB dynamic load process |
| Sun Xiaoyuan1, Li Jihui1*, Ding Hao2, Jin Tingxu1, Xie Jianlin1, Liang Lei1 |
| 1. School of Safety and Emergency Management Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China; 2. School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China |
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Abstract In order to fully explore the failure characteristics of coal and rock under impact dynamic load and further clarify the mechanism of system instability, SHPB dynamic load system was used to carry out impact failure of coal and rock specimens at different speeds, and fragments were collected for screening test. The results showed that the particle size distribution of coal rock specimen was determined by the impact loading speed and the physical properties of the medium. With the increase of impact loading speed, the damage degree of coal and rock increased, the number of broken bodies increased significantly, and the fragment size decreased accordingly. Under the similar impact loading speed, the physical properties of the medium became the dominant factor determining the distribution law of fragments in the roof and bottom slate layer. When the difference between ultrasonic wave velocities of coal seam specimens was not obvious, the impact velocity determined the concentrated distribution area of fragments. When the impact velocity was more than 6 m / s, the coal seam fragments were mainly concentrated in area II, and the rise range of cumulative mass percentage curve could reach 52%. When the impact velocity was less than 6 m / s, the fragments were mainly concentrated in Area III, and the rise range of the curve reached 61%. The research results were helpful to reveal the failure mechanism of coal and rock and enrich the theory of coal and rock dynamic disaster prevention and control.
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| 1 ] 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.
[ 2 ] 胡千庭. 煤与瓦斯突出的力学作用机理及应用研究[ D ]. 北京：中国矿业大学（北京），2007.
[ 3 ] 王 振，胡千庭，金洪伟. 煤岩失稳的发生机制研究[ C ]//自主创新与持续增长第十一届中国科协年会论文集（ 1 ），2009.
[ 4 ] 于亚伦. 岩石动力学的研究内容和动载荷的分类[ C ]// 第四届全国岩石破碎学术讨论会论文集， 1989.
[ 5 ] 解北京. 煤冲击破坏动力学特性及磁场变化特征实验研究[ D ]. 北京：中国矿业大学（北京），2013.
[ 6 ] 于亚伦. 用三轴SHPB装置研究岩石的动载特性[ J ]. 岩土工程学报，1992，14（ 3 ）：76 - 79.
[ 7 ] 鞠 杨，李业学，谢和平，等. 节理岩石的应力波动与能量耗散[ J ]. 岩石力学与工程学报，2006，25（ 12 ）：2 426 -
2 434.
[ 8 ] 黎立云，徐志强，谢和平，等. 不同冲击速度下岩石破坏能量规律的实验研究[ J ]. 煤炭学报，2011，36（ 12 ）：2 007 - 2 011.
[ 9 ] 赵毅鑫，肖 汉，黄亚琼. 霍普金森杆冲击加载煤样巴西圆盘劈裂试验研究[ J ]. 煤炭学报，2014，39（ 2 ）：286 - 291.
[ 10 ] 韩秀会，李成武，邢同振，等. 基于变形场时空演化的煤冲击劈裂试验研究[ J ]. 煤炭学报，2016，41，266（ 11 ）：2 743 - 2 748.
[ 11 ] 刘少虹，李凤明，蓝 航，等. 动静加载下煤的破坏特性及机制的试验研究[ J ]. 岩石力学与工程学报，2013，32（增2）：3 749 - 3 759.
[ 12 ] Li X, Zou Y, Zhou Z. Numerical Simulation of the Rock SHPB Test with a Special Shape Striker Based on the Discrete Element Method[ J ]. Rock Mechanics & Rock Engineering, 2014, 47（ 5 ）: 1 693 - 1 709.
[ 13 ] 郭德勇，吕鹏飞，赵杰超，等. 煤岩冲击变形破坏特性及其本构模型[ J ]. 煤炭学报，2018，43（ 8 ）：2 233 - 2 242.
[ 14 ] 张明涛，王 伟，王奇智，等. 基于SHPB实验的砂岩动态破坏过程及应变-损伤演化规律研究[ J ]. 爆炸与冲击，2021，41（ 9 ）：40 - 53.
[ 15 ] 李夕兵. 岩石动力学基础与应用[ M ].北京：科学出版社，2014.
[ 16 ] 解北京，王新艳，吕平洋. 层理煤岩SHPB冲击破坏动态力学特性实验[ J ]. 振动与冲击，2017，36（ 21 ）：117 - 124.
[ 17 ] 陶俊林，陈裕泽，田常津，等. SHPB 系统圆柱形试件的惯性效应分析[ J ]. 固体力学学报，2005，26（ 1 ）：107 - 110.
[ 18 ] 杜 晶. 不同长径比下岩石冲击动力学特性研究[ D ]. 长沙：中南大学，2011.
[ 19 ] Sun X, Chen G, Li J, et al. Propagation characteristics of ultrasonic P-wave velocity in artificial jointed coal briquettes[ J ]. Journal of Geophysics and Engineering， 2020，17（ 5 ）: 827 - 837.
[ 20 ] SY/T 6351-2012，岩样声波特性的实验室测量规范[ S ].
[ 21 ] JTG E42-2005，公路工程集料试验规程[ S ].
[ 22 ] 曹学禹，刘 阳. 水泥混凝土用细集料筛分试验解析[ J ]. 四川建材，2020，46（ 8 ）：7 - 9.
[ 23 ] 李占金，郝家旺，甘德清，等. 动载作用下磁铁矿石破坏特性实验研究[ J ]. 振动与冲击，2019，38（ 12 ）：231 - 238，245.
[ 24 ] 巩思园. 矿震震动波波速层析成像原理及其预测煤矿冲击危险应用实践[ D ]. 徐州：中国矿业大学，2010.
[ 25 ] 成 林，王 赟，张玉贵，等. 煤岩声波特征研究现状及展望[ J ]. 地球物理学进展，2013，28（ 1 ）：452 - 461. |
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