CAJ | 학술논문

在广泛收集了国内外水库诱发地震震例资料的基础上，利用统计学的方法，进行了水库诱发地震空间分布与时间响应特征及其与库区地质构造环境关系的研究，结果表明：①在空间分布上，诱发地震主要集中在水库周缘10 km范围之内，并局限于特定的库段丛集分布，当库区具备一定的地质构造与水文地质条件时，诱发地震活动会随着水库蓄、放水过程中的水位变化而发生迁移；②对于不同地区或不同水库，诱发地震活动的时间响应存在着差异，总体上：在水库蓄水后1年以内，初次响应占据一定的优势，而绝大部分诱发主震活动发生在水库初始蓄水1年以后。对长时间的水库蓄水历程而言，“混合响应”是水库诱发地震活动表现形式的主体，而“快速响应”和“滞后响应”仅是在一定的时间段内反应的阶段性现象；③诱发地震响应与水库水位变化的关系十分复杂多样，既存在正相关关系，又有负相关性，同时在某种程度上表现出了较高震级的水库诱发地震对水位变化速率的依赖；④水库诱发地震时空分布受发震库区地形地貌与局部地质构造条件、岩性条件、水文地质条件等方面的先存内因的控制，事实上，它们对水库诱发地震时空分布的控制作用并不是截然分开的，其间存在着相互依存、辩证统一的关系。
재엄범수집료국내외수고유발지진진례자료적기출상，이용통계학적방법，진행료수고유발지진공간분포여시간향응특정급기여고구지질구조배경관계적연구，결과표명：①재공간분포상，유발지진주요집중재수고주연10 km범위지내，병국한우특정적고단총집분포，당고구구비일정적지질구조여수문지질조건시，유발지진활동회수착수고축、방수과정중적수위변화이발생천이；②대우불동지구혹불동수고，유발지진활동적시간향응존재착차이，총체상：재수고축수후1년이내，초차향응점거일정적우세，이절대부분유발주진활동발생재수고초시축수1년이후。대장시간적수고축수역정이언，“혼합향응”시수고유발지진활동표현형식적주체，이“쾌속향응”화“체후향응”부시재일정적시간단내반응적계단성현상；③유발지진향응여수고수위변화적관계십분복잡다양，기존재정상관관계，우유부상관성，동시재모충정도상표현출료교고진급적수고유발지진대수위변화속솔적의뢰；④수고유발지진시공분포수발진고구지형지모여국부지질구조조건、암성조건、수문지질조건등방면적선존내인적공제，사실상，타문대수고유발지진시공분포적공제작용병불시절연분개적，기간존재착상호의존、변증통일적관계。
On the basis of the previous work and collections of the latest information on reservoir-induced seismicity, the spatial distribution and time response characteristics of RIS and its relationships with geological structure environment in the reservoir region had been studied by using the method of statistics, the results show that ① in the spatial distribution, RIS mainly concentrated in the range of 10 km away from the reservoir margin and confined to a particular segment of the reservoir. When a certain condition of geological structure and hydrogeological conditions are met in the reservoir region, the activities of RIS will migrate with the changes of water level during water storage and drainage. ② the time responses of RIS are different from region to region and from reservoir to reservoir. In general, RIS’s initial response is dominant when the reservoir is filled less than 1 year, while most of the main earthquakes of RIS occur in more than 1 year after the reservoir initial storage. The “mixture response” is the main form of RIS activities for the long process of reservoir storage, while the“rapid response” and “delayed response” are only a periodic phenomenon. ③RIS response has very complex and diverse relationships with the reservoir water level changes, which can be positive correlation or negative correlation, and higher magnitude of RIS shows certain dependence on the rate of water level changes. ④ RIS spatial and temporal distribution is controlled by the existing internal causes including local terrain features, geological structure, lithologic and hydrogeological conditions in the reservoir area. In fact, all these causes that influenc the spatial and temporal distribution of RIS are interdependent and dialectical united and can not be completely separated.