|本期目录/Table of Contents|

[1]杨伟杰,王文,李东印,等.自然及强制饱和煤样的力学特征试验研究[J].中国安全生产科学技术,2017,13(11):129-134.[doi:10.11731/j.issn.1673-193x.2017.11.021]
 YANG Weijie,WANG Wen,LI Dongyin,et al.Experimental study on mechanical characteristics of coal samples in natural and forced saturation state[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(11):129-134.[doi:10.11731/j.issn.1673-193x.2017.11.021]
点击复制

自然及强制饱和煤样的力学特征试验研究
分享到:

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年11期
页码:
129-134
栏目:
职业安全卫生管理与技术
出版日期:
2017-11-30

文章信息/Info

Title:
Experimental study on mechanical characteristics of coal samples in natural and forced saturation state
文章编号:
1673-193X(2017)-11-0129-06
作者:
杨伟杰1王文123李东印13王杰1刘文超1
(1.河南理工大学,能源科学与工程学院,河南 焦作 454003;2. 山西煤炭进出口集团有限公司, 山西 太原 030006 3.煤炭安全生产河南省协同创新中心,河南 焦作 454003)
Author(s):
YANG Weijie1 WANG Wen123 LI Dongyin13 WANG Jie1 LIU Wenchao1
(1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China; 2. Shanxi Coal Import and Export Group Co., Ltd., Taiyuan Shanxi 030006, China; 3. Coal Production Safety Collaborative Innovation Center in Henan Province, Jiaozuo Henan 454000, China)
关键词:
煤样自然饱和强制饱和单轴压缩三轴压缩
Keywords:
coal sample natural saturation forced saturation uniaxial compression triaxial compression
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2017.11.021
文献标志码:
A
摘要:
为探讨不同饱水状态下煤的力学变化特征,利用RMT-150B岩石力学系统并自行设计及研制煤样饱和试验装置,对自然饱和与强制饱和的煤样进行单轴、三轴压缩静载试验。结果表明:煤样强制饱和前后波速变化明显,强制吸水后波速增加51.75%;强制饱和煤样单轴抗压强度比自然饱和煤样平均降低了7.61MPa,降幅54.83%;三轴压缩时不同围压下强制饱和煤样峰值强度平均降低了19.5MPa,降幅31.18%;强制饱和煤样吸水量较自然饱和煤样大,K值降低。基于Mohr-Coulomb准则及有效应力原理,推导出孔隙水压与黏聚力、抗压强度呈负相关,表明强制饱和煤样的黏聚力与抗压强度均低于自然饱和煤样,并与试验结果对比验证。
Abstract:
In order to study the mechanical change characteristics of coal samples under different saturation states, an experimental device of coal sample in different saturation state was designed and developed by using the RMT-150B rock mechanics test system, and the uniaxial and triaxial compression static load tests were conducted on the coal samples in natural and forced saturation stats. The results showed that the wave velocity changed obviously before and after the forced saturation of coal samples, and the wave velocity increased by 51.75% after the forced saturation. The uniaxial compressive strength of coal samples in forced saturation state decreased by 7.61 MPa and 54.83% decreasing amplitude than that of coal samples in natural saturation state on the average. Under the triaxial compression, the peak intensity of coal samples in forced saturation state under different confining pressures decreased by 19.5 MPa and 31.18% decreasing amplitude on the average. The water absorption capacity of coal samples in forced saturation state was larger than that of coal samples in natural saturation state, and the K value decreased. Based on the Mohr-Coulomb criterion and the effective stress principle, it was deduced that the pore water pressure has a negative correlation with the cohesive force and compressive strength, which showed that the cohesive force and compressive strength of coal samples in forced saturation state were both lower than those of coal samples in natural saturation state, and the results were verified by comparing with the experimental results.

参考文献/References:

[1]熊德国, 赵忠明, 苏承东,等. 饱水对煤系地层岩石力学性质影响的试验研究[J]. 岩石力学与工程学报, 2011, 30(5):998-1006. XIONG Deguo, ZHAO Zhongming, SU Chengdong, et al. Experimental study of effect of water-saturated state on mechanical properties of rock in coal measure steata[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(5):998-1006.
[2]Zhou Z, Cai X, Cao W, et al. Influence of water content on mechanical properties of rock in both saturation and drying processes[J]. Rock Mechanics & Rock Engineering, 2016, 49(8):3009-3025.
[3]张辉, 程利兴, 苏承东,等. 饱水煤样巴西劈裂强度和能量特征试验研究[J]. 中国安全生产科学技术, 2015(12):5-10. ZHANG Hui, CHENG Lixing, SU Chengdong, et al. Experimental study on strength and energy characteristics of Brazilian split for saturated coal specimens[J]. Journal of Safety Science and Technology, 2015(12):5-10.
[4]于岩斌, 周刚, 陈连军,等. 饱水煤岩基本力学性能的试验研究[J]. 矿业安全与环保, 2014(1):4-7. YU Yanbin, ZHOU Gang, CHEN Lianjun, et al. Experimental study on basic mechanical properties of water-saturated coal[J]. Mining Safety, 2014(1):4-7.
[5]刘玉春, 赵扬锋, 张超,等. 含水煤岩单轴压缩微震信号特征试验研究[J]. 中国安全生产科学技术, 2017, 13(2):51-55. LIU Yuchun, ZHAO Yangfeng, ZHANG Chao, et al. Experimental research on microseismic signal characteristics of moisture-containing coal and rock in uniaxial compression[J]. Journal of Safety Science and Technology, 2017, 13(2):51-55.
[6]苏承东, 翟新献, 魏向志,等. 饱水时间对千秋煤矿2#煤层冲击倾向性指标的影响[J]. 岩石力学与工程学报, 2014, 33(2):235-242. SU Chengdong, ZHAI Xinxian, WEI Xiangzhi, et al. Influence of saturation period on bursting liability indices for coal seam #2 in qianqiu coal mine[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(2):235-242.
[7]王文,李化敏,顾合龙. 三维动静组合加载含水煤样强度特征试验研究[J]. 岩石力学与工程学报, 2017, 36(10): 2406-2414. WANG Wen, LI Huamin, GU Helong, et al. Experimental study of strength characteristics of waterer-saturated coal specimens under 3D coupled static-dynamic loadings[J]. Journal of China Coal Society, 2017, 36(10): 2406-2414.
[8]王文, 李化敏, 顾合龙,等. 动静组合加载含水煤样能量耗散特征分析[J]. 岩石力学与工程学报, 2015,34(S2):3965-3971. WANG Wen, LI Huamin, GU Helong, et al. Feature analysis of energy dissipation of water-saturated coal samples under coupled static-dynamic loads[J]. Journal of China Coal Society, 2015,34(S2):3965-3971.
[9]唐书恒, 颜志丰, 朱宝存,等. 饱和含水煤岩单轴压缩条件下的声发射特征[J]. 煤炭学报, 2010(1):37-41. TANG Shuheng, YAN Zhifeng, ZHU Baocun, et al. Acoustic emission characteristics of water}aturated coals in uniaxial compression experiment[J]. Journal of China Coal Society, 2010(1):37-41.
[10]王云刚, 李满贵, 陈兵兵,等. 干燥及饱和含水煤样超声波特征的实验研究[J]. 煤炭学报, 2015, 40(10):2445-2450. WANG Yungang, LI Mangui, CHEN Bingbing,et al. Experimental study on ultrasonic wave characteristics of coal samples under dry and water saturated conditions[J]. Journal of China Coal Society, 2015, 40(10):2445-2450.
[11]苏承东, 翟新献, 李永明,等. 煤样三轴压缩下变形和强度分析[J]. 岩石力学与工程学报, 2006, 25(S1):2963-2968. SU Chengdong, ZHAI Xin Xian, LI Yongming, et al. Study on deformation and strength of coal samples in triaxial compression[J]. Journal of China Coal Society, 2006, 25(S1):2963-2968.
[12]沈明荣, 陈建峰. 岩体力学[M]. 上海:同济大学出版社, 2006.
[13]沈珠江. 理论土力学[M]. 北京:中国水利水电出版社, 2000.
[14]郭海防. 水压力作用下煤岩损伤弱化规律研究[D].西安: 西安科技大学, 2010.

相似文献/References:

备注/Memo

备注/Memo:
国家自然科学基金青年基金项目(51604093);河南理工大学博士基金项目(B2017-42)
更新日期/Last Update: 2017-12-27