Experimental Research on the Mechanical Characteristics and the Failure Mechanism of Coal-Rock Composite under Uniaxial Load
المؤلفون المشاركون
Liu, Wenjie
Zhang, Yonggang
Yang, Ke
Chi, Xiaolou
Wei, Zhen
Dou, Litong
المصدر
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-11، 11ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-09-19
دولة النشر
مصر
عدد الصفحات
11
التخصصات الرئيسية
الملخص EN
Due to the influence of the component structure and combination modes, the mechanical characteristics and failure modes of the coal-rock composite show different characteristics from the monomer.
In order to explore the effect of different coal-rock ratios on the deformation and the failure law of the combined sample, the RMT rock mechanics test system and acoustic emission real-time monitoring system are adopted to carry out uniaxial compression tests on coal, sandstone, and three kinds of combined samples.
The evolution rules of the mechanical parameters of the combined samples, such as the uniaxial compressive strength, elastic modulus, and Poisson’s ratio, are obtained.
The expansion and failure deformation characteristics of the combined sample are analyzed.
Furthermore, the evolution laws of the fractal and acoustic emission signals are combined to reveal the crack propagation and failure mechanism of the combined samples.
The results show that the compressive strength and elastic modulus of the combined sample increase with the decrease of the coal-rock ratios, and Poisson’s ratio decreases with the decrease of the coal-rock ratios.
The strain softening weakens at the postpeak stage, which shows an apparent brittle failure.
The combined sample of coal and sandstone has different degrees of damages under load.
The coal is first damaged with a high degree of breakage, with obvious tensile failure.
The acoustic emission energy value presents different stage characteristics with increasing load.
Crackling sound occurs in the destroy section before the sample reaches the peak, along with small coal block ejection and the partial destruction.
The energy value fluctuates violently, with the appearance of several peaks.
At the postpeak stage, the coal samples expand rapidly with a loud crackling sound in the destroy section, and the energy value increases dramatically.
The crack propagation induces the damage in the sandstone; when the energy reaches the limit value, the instantaneous release of elastic energy leads to the overall structural instability.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Yang, Ke& Wei, Zhen& Chi, Xiaolou& Zhang, Yonggang& Dou, Litong& Liu, Wenjie. 2020. Experimental Research on the Mechanical Characteristics and the Failure Mechanism of Coal-Rock Composite under Uniaxial Load. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1124662
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Yang, Ke…[et al.]. Experimental Research on the Mechanical Characteristics and the Failure Mechanism of Coal-Rock Composite under Uniaxial Load. Advances in Civil Engineering No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1124662
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Yang, Ke& Wei, Zhen& Chi, Xiaolou& Zhang, Yonggang& Dou, Litong& Liu, Wenjie. Experimental Research on the Mechanical Characteristics and the Failure Mechanism of Coal-Rock Composite under Uniaxial Load. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1124662
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1124662
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر