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[1]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.[doi:10.11731/j.issn.1673-193x.2017.02.009]
 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.[doi:10.11731/j.issn.1673-193x.2017.02.009]
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含水煤岩单轴压缩微震信号特征试验研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年2期
页码:
51-55
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-02-28

文章信息/Info

Title:
Experimental research on microseismic signal characteristics of moisture-containing coal and rock in uniaxial compression
文章编号:
1673-193X(2017)-02-0051-05
作者:
刘玉春1赵扬锋2张超2程传杰2
1.辽宁工程技术大学 理学院,辽宁 阜新 123000;2.辽宁工程技术大学 力学与工程学院,辽宁 阜新 123000
Author(s):
LIU Yuchun1 ZHAO Yangfeng2 ZHANG Chao2 CHENG Chuanjie2
1. College of Science, Liaoning Technical University, Fuxin Liaoning 123000, China; 2. School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China
关键词:
含水煤岩单轴压缩微震特征采矿工程
Keywords:
moisture-containing coal and rock uniaxial compressio microseismic characteristics mining engineering
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2017.02.009
文献标志码:
A
摘要:
为了对煤层底板突水进行预测,基于煤岩在压力作用下有微震信号产生,提出利用自行设计的微震全波形综合监测试验系统对干燥煤岩和含水煤岩变形破裂过程微震信号的变化规律进行研究。结果表明:煤岩变形破裂过程可分为压实阶段、线弹性变形阶段和破裂发展阶段,在破裂发展阶段微震信号事件数和信号强度迅速增加;随着加载速度的增大煤岩的峰值强度增大,煤体产生微震信号事件数增多,大振幅的微震信号事件也增多,出现应力下降即煤岩形成较大裂隙时产生强度较大的微震信号;但饱和含水煤岩的峰值强度和煤岩冲击倾向性比自然干燥煤岩都低,且微震信号事件数和信号强度都降低。上述结论对指导现场煤层底板突水的预警有重要意义。
Abstract:
In order to predict the water-inrush in coal seam floor, based on the microseismic signals generation of coal and rock under pressure, the variation laws of microseismic signals during the deformation and fracture process of dry and water-containing coal and rock were studied by using the self-designed microseismic full waveform comprehensive monitoring test system. The results showed that the deformation and fracture process of coal and rock can be divided into compression stage, elastic deformation stage and fracture development stage. The event number and strength of microseismic signals increase rapidly in the stage of fracture development. With the increase of loading speed, the peak strength of coal and rock increases, the event number of microseismic signals produced by coal increases, as well as the event number of large amplitude microseismic signals, and the stronger microseismic signals appear when the stress drop occurs, namely larger cracks of coal and rock come into being. Both the peak strength and rockburst tendency of saturated moisture-containing coal and rock are lower than those of natural dry coal, and both the event number and the strength of microseismic signals reduce. The above conclusions have great significance to guide the early-warning of coal seam floor water-inrush in the field.

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备注/Memo

备注/Memo:
国家自然科学基金项目 (51274114);辽宁省自然科学基金项目 (2015020617);辽宁工程技术大学创新研究基金项目(20160023T)
更新日期/Last Update: 2017-03-29