时间剖面上小断层的计算机自动检测     

杨文强  钱建伟 《煤田地质与勘探》1996,24(3):46-49

煤田地震勘探一直探寻着对小断层的自动检测方法，因受各种因素的影响，至今尚无良策。本文介绍了多元地震参数的模式识别方法，并通过模型及实测资料成功地检测到１０ｍ以下小断层。  相似文献   

Early Estimation of Strong Aftershock Duration Time     

Zhou Cuiying  Wang Hongwei  Wang Mei  and Zhang YuxiaSeismological Bureau of Shandong Province  Jinan  China Center for Analysis  Prediction  SSB  Beijing  China 《中国地震研究》1997,(4)

In order to solve the problem of early estimation of moderately strong aftershock duration time in an earthquake sequence,this study has been conducted.First,the definition of the strong aftershock has been given.It is pointed out that there is a difference in the strong aftershock duration time between the main shock type sequence and the strong earthquake swarm sequence.After dividing the three cases,i.e.,a strong aftershock duration time larger than 1 day,smaller than 1 day,and no strong aftershock occurred in a main shock type sequence by using the pattern recognition method,we gave the rough correlation relation between strong aftershock duration time and first large shock magnitude for two types of sequences.Finally,the judgment index and method of estimating strong aftershock duration times for different sequence types have been given.  相似文献   

Main models and distribution patterns of gas reservoirs in large-medium gas fields of China     

Yan Song  Jinxing Dai  Chunsen Dai  Ying Chen  Feng Hong 《中国科学D辑(英文版)》1997,40(1):23-31

Based on characteristics and trap types of gas reservoirs in large and medium gas fields in China, 4 gas reservoir models have been established:(i) structural trap gas reservoir model I, formed earlier than or simutaneously with generating of gases; (ii) structural trap gas reservoir model II, formed later than generating of gases; (iii) fossil weathered residuum gas reservoir model; and (iV) mud diapir abnormal temperature and pressure gas reservoir model. Distribution patterns of large-medium gas fields are described with the concept of “sealed compartment”. It is concluded that the inner-compartment area, marginal area of the compartment and the areas between two overlapped sealed compartments are the most favourable areas for discovering large-medium gas fields. Project supported by the “85–102” Chinese National Key Science and Technology Project.  相似文献   

岩体力学试验的理论分析   总被引：1，自引：2，他引：1  

刘钧  郭志 《工程地质学报》1997,5(2):156-162

本文通过对岩石力学试验中岩石试件破坏方式的分析, 在理论上解释了岩体力学试验中经常遇到的一些力学现象并且作出了定量的回答, 同时还建立了岩石的各种破坏模式的判据。  相似文献   

依兰-萝北地区地震危险区地震活动跟踪研究   总被引：4，自引：0，他引：4  

郭德明 《东北地震研究》2004,20(3):8-16

本文选取地震活动图像演化和地震学参数变化两项指标，采用有时间段的时空扫描进行演化研究，逐步将这种演化研究推进到短期阶段进行跟踪研究。认为依兰-萝北地区近期发生5级左右地震可能性较小，黑龙江断裂两侧可能会有4级左右地震发生。  相似文献   

大同煤田岩溶地下水的水文地质特征分析   总被引：1，自引：1，他引：1  

赵慧玲 《中国煤田地质》2004,16(1):26-28,35

根据大同煤田岩溶地下水化学特征资料、钻孔揭露岩溶发育的资料、以及矿井出水资料，结合岩溶地下水区域水文地质条件、岩溶地下水的水温与同位素特征，对大同煤田岩溶地下水的富水层位与找水方向作了进一步的探讨与分析。  相似文献   

马家沟矿断层赋存规律及其对生产的指导作用     

张计恒  谢玉祥 《中国煤田地质》2004,16(Z1):4-5

笔 者 结合 工 作 实 践 ,概 述 了 马 家 沟 井 田 范 围 内 断 层 发 育 的 特 点 及 其 基 本 规 律 ;重 点 分 析 了F2断 层 的 赋 存 特征 ,简 要说 明 了根 据断 层赋 存 规律 对生 产 的指 导作 用 。  相似文献   

钱家营矿首采区断层在剖面上的延伸规律     

姚仲宝  刘金国 《中国煤田地质》2004,16(Z1):10-11

通 过对 开滦钱 家营 矿首采 区地 质资料 的综 合分析 ,得 出了 该 矿首 采区 断 层在 剖面 上 的变 化特 征 及规 律,并运用这些 规律 ,对未 采区进 行预 测、预报 ,正确 指导了 采掘 工程的 顺利 进行。  相似文献   

开滦林南仓井田岩浆岩侵入规律及找煤方向探讨     

丁立锋 《中国煤田地质》2004,16(Z1):12-13

通 过地 面钻孔 、井下 开采和 磁法 勘探,发现 井 田内 赋存 有 大量 的岩 浆 岩体 ,特 别是 西二 采 区发 育岩 床 ,使该 区可采 储量 急 剧减 少,严重 影 响了 井田 采 掘 工 程的 衔 接 ,使 矿 井 生产 处 于 被 动局 面 。 通过 对 岩 浆 岩侵 入 规 律 的深 入 研究,预 测了井 田岩 床的分 布范 围和面 积,对 区域找 煤以 及为矿 井生 产和可 持续 发展具 有现 实的指 导意 义。  相似文献   

Ambiguous Moment Tensors and Radiation Patterns in Anisotropic Media with Applications to the Modeling of Earthquake Mechanisms in W-Bohemia   总被引：3，自引：0，他引：3  

Rössler  D.  Rümpker  G.  Krüger  F. 《Studia Geophysica et Geodaetica》2004,48(1):233-250

Anisotropic material properties are usually neglected during inversions for source parameters of earthquakes. In general anisotropic media, however, moment tensors for pure-shear sources can exhibit significant non-double-couple components. Such effects may be erroneously interpreted as an indication for volumetric changes at the source. Here we investigate effects of anisotropy on seismic moment tensors and radiation patterns for pure-shear and tensile-type sources. Anisotropy can significantly influence the interpretation of the source mechanisms. For example, the orientation of the slip within the fault plane may affect the total seismic moment. Also, moment tensors due to pure-shear and tensile faulting can have similar characteristics depending on the orientation of the elastic tensor. Furthermore, the tensile nature of an earthquake can be obscured by near-source anisotropic properties. As an application, we consider effects of inhomogeneous anisotropic properties on the seismic moment tensor and the radiation patterns of a selected type of micro-earthquakes observed in W-Bohemia. The combined effects of near-source and along-path anisotropy cause characteristic amplitude distortions of the P, S1 and S2 waves. However, the modeling suggests that neither homogeneous nor inhomogeneous anisotropic properties alone can explain the observed large non-double-couple components.The results also indicate that a correct analysis of the source mechanism, in principle, is achievable by application of anisotropic moment tensor inversion.  相似文献