【作者】 肖建华； 梁为民；

【Author】 XIAO Jian-hua LIANG Wei-min (Henan Polytechnic University Jiaozuo City,Jiaozuo 454000,China)

【机构】 河南理工大学；

【摘要】 在夹有高速岩石的层状地层的爆炸工程中,层状地层的法向剥离量与爆炸源的位置有敏感的联系。在高速岩石夹层上爆炸时,层状地层的法向剥离量很小。在高速岩石夹层下爆炸时,层状地层的法向剥离量显著增大。一般认为这是高速岩石夹层的惯性变形的贡献。本研究先将地层的爆炸变形分解为转动变形和伸张变形的乘积,研究层状地层的法向剥离量与应力的关系方程；最后用岩石的力学强度作为判据,给出法向剥离量与爆炸源位置的理论关系。结果表明：在高速岩石夹层下爆炸时,法向剥离量的大小与岩石的力学参数、厚度、爆炸源的法向距离、及爆炸源参数有直接的联系。这种联系是非线性的。对线爆炸源,文中用有关参数给出了法向剥离量的理论公式。更多还原

【Abstract】 For explosion bucking engineering in layered formation embedded with high velocity layer,the vertical bucking range is highly sensitive about the position of explosion source.When the explosion source is positioned above the high velocity layer,the bucking range is very small.When the explosion source is positioned under the high velocity layer,the bucking range is increased significantly.This is usually explained by the contribution of deformation inertia in the high velocity layer.In this research,the deformation gradient is decomposed into the multiplicative of stretching and rotation,firstly.The relation equations between the vertical bucking range and the stress field are established.Finally,based on the stress strength principle for cracking,the theoretic formulation of vertical bucking range referring to explosion source position is obtained.The results show that:for the explosion under the embedded high velocity layer,the vertical bucking range depends on the mechanic parameters of rock,the thickness of layer,the normal distance of source from the high velocity layer,and explosion parameters.This relation equation is non-linear.For line-source explosion, the theoretic formulation of vertical bucking range is expressed by the related parameters.更多还原