文档介绍：震源构造地震原理
袁建华
( 浙江省江山市 324100)
摘要为阐明自然地震的震源构造和发震过程的物理部分,用区分震中地面遗迹和运动现象为震源块体、震源深度和周边地层等三大因素的单一效应和综合效应的方法,选择震源块体效应表达率较高的事件为对象,观察、采集其震中区地面的遗迹和运动特征,分析、归纳震中地表面有关震源因素的效应所传达的内涵属性,得到的结论是:破坏性地震是地层中大岩石块体向空域方向的位移运动(多数为倾倒的形式)产生的地层及地面运动现象;震源构造是地层中存在的“临空块体-”构造;地震能量源于震源块体撞击地层时减少的重力势能;微观震中是块体撞击处的地面投影;宏观震中是被块体驱动的上方地层表面区域;主要破坏力源于被驱动的地面加速度,出现在始裂缝产出后,是块体倾角的正弦函数,方向指向震中区地面弧运动的弧切线方向。
关键词震源构造地震原理临空块体- 倾倒始裂缝加速度破坏力表达系数中图号: P3153
The Earthquake Source Tectonics and The Earthquake Mechanic
Yuan Jianhua
( Zhejiang Province Jiangshan City 324100)
[Abstract]To clarify the earthquake source tectonics and the physical part of the process, the method is: differentiatint the movement phenomenon on the ground of the epicentre,which were caused by topple over stone block, depth and surrounding stratum; selecting and observing the events that have bigger effect caused by the focus of an earthquake on ground; collecting the remains of macroscopic epicenter and movement characteristics of the ground; analyzing and summarizing the meaning what it convey to the nature attributes from deep stratum on the epicentre ground. And the conclusion is: the badly earthquake is the stratum and ground movement phenomenon which are caused by some large stone free-blocks what are taking place topple over underground. The earthquake source tectonics is the "o-space block" tectonics. The earthquake es from the decrease of the gravitational potential energy that was the result of the hypocentral block topple over. The microscopic epicenter is the projection of the block impact site at the ground. The macroscopic epicenter is the surface of the area formation that was driven by the top of the hypocentral block . The major destructive es from the ground acceleration, after the crack begining appeared, which is the sine function of the inclination of hypocentral block, pointing to the direction of the arc tangent of arc movement.
[Key Words]Earthquake source tectonics,Earthquake mechanism,O-space block,Topple over