Design and Application of Blasting Parameters for Presplitting Hard Roof with the Aid of Empty-Hole Effect
المؤلفون المشاركون
Chen, Baobao
Liu, Changyou
Yang, J. X.
المصدر
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-16، 16ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-09-02
دولة النشر
مصر
عدد الصفحات
16
التخصصات الرئيسية
الملخص EN
Theoretical calculation and numerical simulation were performed to analyze the mechanism of rock fracturing between holes in deep-hole presplit blasting, crack evolution under the synergistic action of dynamic and static loads, and the mechanism of fracture movement guided by tangential stress concentration of empty holes.
The pattern and characteristic zones of main and wing cracks across a cross section were identified.
Combined with blast dynamics, the scope of stress-induced cracks around blast holes and the maximum length of secondary cracks induced by detonation gas was calculated.
It was found that the initiation and extension of cracks were oriented predominantly along the line passing through the hole centers (LPTHC).
Moreover, the maximum length of the tensile crack zone induced by reflected stress waves was obtained.
The effects of empty-hole diameter and charge coefficient on crack propagation were analyzed, and the proper blast-hole spacing was determined.
Later, a LS-DYNA3D blast model was used to illustrate von Mises stress propagation, strain variation, and evolution of main and wing cracks between holes.
The scope of strain failure, fracture pattern, and crack characteristic zones in the rock mass was determined.
The results demonstrate that the hole spacing, at 3.2 m, is reasonable.
Furthermore, blasting parameters were determined for 8939 working face at Xinzhouyao Mine and then deep-hole blasting was implemented to presplit the hard roof.
After presplitting, the working resistance of supports was significantly reduced, thereby achieving effective control on the hard roof.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Chen, Baobao& Liu, Changyou& Yang, J. X.. 2018. Design and Application of Blasting Parameters for Presplitting Hard Roof with the Aid of Empty-Hole Effect. Shock and Vibration،Vol. 2018, no. 2018, pp.1-16.
https://search.emarefa.net/detail/BIM-1215511
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Chen, Baobao…[et al.]. Design and Application of Blasting Parameters for Presplitting Hard Roof with the Aid of Empty-Hole Effect. Shock and Vibration No. 2018 (2018), pp.1-16.
https://search.emarefa.net/detail/BIM-1215511
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Chen, Baobao& Liu, Changyou& Yang, J. X.. Design and Application of Blasting Parameters for Presplitting Hard Roof with the Aid of Empty-Hole Effect. Shock and Vibration. 2018. Vol. 2018, no. 2018, pp.1-16.
https://search.emarefa.net/detail/BIM-1215511
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1215511
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