地质灾害与地层岩性的关系探讨

通过对福建省内10余个县（市）地质灾害调查与区域综合研究分析。认为各种地质灾害的发生与地质体的母岩有着内在联系,不同类型地质体母岩所发生地质灾害的种类、机率和形成规模也不尽相同。基于福建省现有地质灾害数据库所采集的资料,就地质灾害与地质体母岩的影响关系进行初步探讨。     

Petroleum System in Deepwater Basins of the Northern South China Sea

The northern South China Sea margin has experienced a rifting stage and a post-rifting stage during the Cenozoic.In the rifting stage,the margin received lacustrine and shallow marine facies sediments.In the post-rifting thermal subsidence,the margin accumulated shallow marine facies and hemipelagic deposits,and the decpwater basins formed.Petroleum systems of deepwater setting have been imaged from seismic data and drill wells.Two kinds of source rocks including Paleogene lacustrine black shale and Oligocene-Early Miocene mudstone were developed in the deepwater basin of the South China Sea.The deepwater reservoirs are characterized by the deep sea channel fill,mass flow complexes and drowned reef carbonate platform.Profitable capping rocks on the top are mudstoues with huge thickness in the post-rifting stage.Meanwhile,the faults developed during the rifting stage provide a migration path favournble for the formation of reservoirs.The analysis of seismic and drilling data suggests that the joint structural and stratigraphic traps could form giant hydrocarbon fields and hydrocarbon reservoirs including syn-rifting graben subaqueous delta,decpwater submarine fan sandstone and reef carbonate reservoirs.     

延安地区水泥原料及其开发可行性研究

延安地区中侏罗统安定组中产有陆相泥灰岩,CaO含量低于30％,且SiO_2、MgO含量高,通常不作为水泥原料。上新统三趾马红土中产有层状料僵石,两者搭配首次在φ1.5×6m普立窑中烧制出质量高的425水泥,为水泥原料贫乏的延安地区开发低品位劣质原料开辟了新途径。     

华北板块东南缘海相层系演化特征及油气远景

在大别造山带内发现的可燃天然气和发生燃烧的隧道具有明显的区域性,集中分布于磨子潭-晓天断裂以南的北大别杂岩带和信阳-舒城断裂附近的早石炭世变质石英片岩中,磨子潭-晓天断裂和信阳-舒城断裂是连通深部的气源通道断裂;推覆体之下的下寒武统凤台组和北淮阳型石炭系两套海相烃源岩是隧道可燃天然气的主力气源岩,其中下寒武统凤台组属大陆边缘沉积,其发育的海相泥质烃源岩具有高碳,高Ro,高Tmax和低氯仿A的特点,已进入热演化的过成熟阶段;北淮阳型石炭系处于前陆盆地的沉积中心,地层序列齐全,其煤系源岩有机质丰度高,以Ⅲ型干酪根为主,热演化程度很高,大量的油气已经生成,最重要的是研究其成烃过程与圈闭配套史的关系。大别造山带隧道可燃天然气的发现展示了合肥盆地区深部海相层系可能潜在良好的勘探前景。因此,进一步勘探重心应从中新生代盆地系统转移到深部海相层系,以寻找古生古储或古生新储类型油气藏为主。     

松辽盆地徐家围子地区下白垩统登娄库组储层物性研究

储层问题是制约深层天然气勘探获得突破的主要问题之一。深部优质储层孔隙成因和保存机理、次生孔隙发育带研究很薄弱,储集性质控制因素研究程度不够,难于进行有利储层分布的预测。研究以储层地质学和储层地球化学理论为指导,结合储层宏观研究和盆地沉积史及热史研究成果,对徐家围子断陷深层下白垩统登娄库组的砂岩储层中碎屑岩储层岩性、物性、孔隙类型及储集性的变化规律进行了介绍。     

软岩的强度—变形—时间之间关系的试验分析

对软岩和有不连续面的软岩试样进行一系列固结不排水三轴压缩和蠕变试验,测定并分析了它们在正常固结和超固结状态下的应变软化性状、蠕变特性和残余强度的变化规律。探讨了软岩中存在的不连续面对应力－应变关系、残余强度特性和蠕变应变速率的影响。     

Surface conductivity in rocks: a review

Electrical properties of rocks depend on composition (i.e. bulk properties of the constituents), micro structure (i.e. geometrical arrangement of the constituents) and interfacial effects. We consider here a rock as a three component system — grains, pores, and interfaces — in order to account for the observed behaviour. We review first the main results relative to DC. conductivity. Surface conductivity effects show up clearly in the case of shaly formations or at low salinities. Although Archies' law (1942) and Waxman and Smits model (1968) are widely used, a more physically based model is that of Johnson and Sen (1988). We review also the variable frequency conductivity (complex conductivity) data and models. The important effect in that case is the enhancement of the dielectric constant at low frequencies (Knight and Nur, 1987) which can be interpreted as a geometrical effect although electrochemical interactions may also play an important role at low frequencies, depending on the rock type.     

露天转井工采场及其覆岩采动响应特征研究

以云南磷化集团有限公司晋宁磷矿为依托背景,借助数字照相量测技术,通过相似材料模拟试验,对20与50两种矿体倾角赋存下,露转井工后,井下采场及其上覆岩层的位移与应力响应特征及动态演化过程进行了系统研究。结果表明：（1）地下采场围岩及覆岩的变形演化过程可划分为局部小范围微动、线性持续增大以及整体非线性剧烈垮塌3个阶段;（2）矿体倾角由20增至50后,边坡与地下采场围岩及覆岩的变形整体趋缓,采动影响范围小幅度缩减,沉降曲线则由非对称槽型变为碗型;（3）采场矿柱回收过程中,地下采场围岩及覆岩发生突发性失稳,呈现出明显的多米诺骨牌效应。相关研究结论可为矿山露天转地下开采后地压管理与边坡维护提供一定的理论参考。     

内蒙古中部下二叠统火山岩特征及构造环境意义

内蒙古中部下二叠统火山岩的研究多年来存在争议,从岩石学,岩石地球化学等多方面对其进行研究分析,并探讨了形成环境及构造意义。     

Fracture plane control in rock blasting

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