科恰诺夫А.Н.;奥金采夫В.Н.;
Kochanov A.N.;Odintsev V.N.;Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences-IPKON RAS;

• 1:俄罗斯科学院地下资源综合开发研究所

摘要(Abstract)：

研究爆炸冲击波作用下,岩体弹性变形区的应力状态,估算岩石天然微裂纹激活区即预裂区的边界尺寸。在估算中,使用球面腔压力跃变理论及裂纹扩展理论对几种典型的岩石类型进行了定量估算,得出岩石预裂区的尺寸取决于岩石微观结构和岩体压力。
The paper considers stress state in rock elastic deformation area under dynamical effect of blast wave and gives estimation of radius of natural microcrack activation area,i.e.rock prefracture area.Under the condition of spherical symmetry the radius is found from a system of equations including terms for gas pressure in explosion cavity,rock pressure in rock mass,rock fracture strength,characteristic size of rock natural microcracks(defects),as well as Young's modulus and Poisson coefficient.Quantitative estimation of prefracture area radii is made for several rock types.It is established that size of this area depends mainly on two independent microstructural factors,i.e.rock fracture toughness and rock natural defects.Sizes of rock prefracture area may differ by several-fold depending on these parameters.

关键词(KeyWords)： 地下爆破;应力波;弹性变形;岩石拉应力;微裂纹扩展;预裂区
Camouflet explosion;Wave;Elastic strain zone;Rock extension;Microcrack growth;Microfractured area

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 科恰诺夫А.Н.;奥金采夫В.Н.;
Kochanov A.N.;Odintsev V.N.;Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences-IPKON RAS;

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