STRESS FIELD AT A TIP OF A PREFABRICATED SPIRAL V-NOTCH  

作　　者：郑周练 陈山林 叶晓明 

机构地区：[1]Fuclty of Civil Engineering,Chongqing University,Chongqing,400045,P.R.China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2004年第6期612-617,共6页应用数学和力学（英文版）

基　　金：the Science Foundation of Chongqing Committee of Science and Technology

摘　　要：Based on the tranditional V-notched blasting, a technique of spirally V-notched blasting to loosen earth and rock was presented. Fracture mechanics and Westergaard stress function were adopted to build a complex stress function to derive the plane stress and strain fields at one tip of the crack under a quasi-static pressure. An expression was formulated to define the stress intensity factor of spiral V-notch loosen blasting. Factors that have effects on the stress intensity factor were studied. It is demonstrated that spiral V-notch loosen blasting is an extension of vertical V-notch blasting, straight cracking, and alike theories.Based on the tranditional V-notched blasting, a technique of spirally V-notched blasting to loosen earth and rock was presented. Fracture mechanics and Westergaard stress function were adopted to build a complex stress function to derive the plane stress and strain fields at one tip of the crack under a quasi-static pressure. An expression was formulated to define the stress intensity factor of spiral V-notch loosen blasting. Factors that have effects on the stress intensity factor were studied. It is demonstrated that spiral V-notch loosen blasting is an extension of vertical V-notch blasting, straight cracking, and alike theories.

关 键 词：PREFABRICATION spiral notch stress field stress intensity factor quasi-static pressure 

分 类 号：TD235.3[矿业工程—矿井建设] TD235.1