炸药震源在济阳坳陷粘土介质中的激发理论初探

Preliminary discussion on shooting theory for dynamite in clay medium of Jiyang Depression

1中国石油大学（北京）,北京102249；2中国石油化工集团公司胜利石油管理局物探公司,山东东营 257100

China University of Petroleum (Beijing),Beijing 102249,China

针对济阳坳陷的粘土介质,对影响激发效果的因素进行了系统分析和理论探讨。应用爆炸动力学和介质力学等理论,对济阳坳陷粘土介质爆破变形、破坏特征进行了研究；分析了爆炸应力随距离的变化规律；给出了空腔区、破碎区和塑性区的半径计算公式；论证了炸药爆炸能量在粘土介质中的能量分配理论,讨论了炸药爆速、密度等参数以及激发介质的速度、密度、弹性模量对地震波能量的影响。在理论研究的基础上,在济阳坳陷WHZ探区的不同激发介质中进行了13种不同爆速的炸药震源试验,试验结果与理论分析比较吻合,地震资料质量有了改进。

Preliminary discussion on shooting theory for dynamite in clay medium of Jiyang Depression. Cui Ruguo,Wang Shangxu,Ning Pengpeng,Cao Guobin.GPP,2009,48(6):606~610
In seismic exploration,there are many factors impacting the explosive effect of dynamite source.For the clay medium of Jiyang Depression,the factors of influencing explosive effect were theoretical discussed.Based on explosive dynamics and medium mechanics,explosion deformation and damage characteristics for the clay median of Jiyang Depression was studied,the changing rules of explosive stress via distance was analyzed,and the radius calculation formula of cavity zone,crushed zone and plastic zone were given,the explosive energy distribution in clay medium was demonstrated,and the impact of detonation velocity and dynamite density on seismic wave energy,as well as the velocity,density and elastic module of shooting medium on seismic wave energy was studied.Based on the study of explosive theory,the explosive test with thirteen types of detonation velocity has been done in different shooting medium at WHZ area in Jiyang Depression.The test results coincide with the theoretical analysis,and the quality of seismic data has been improved.