建设场地工程动力地质效应与地质灾害之研究(以福州——泉州高速公路为例)

本文依据福州———泉州高速公路工程场地所处的地质地震环境、工程地质、现代构造应力场等资料综合研究 ,探讨在地震活动带内建设场地的工程动力地质效应的力学特点及其产生地质灾害的类型 ,为工程因地制宜的安全设计 ,提供一条动力学思路     

华北晚前寒武纪（中、新元古代）岩石地层单位及多重划分对比

晚前寒武纪地层是华北早前寒武纪褶皱变质基底之上的第一套沉积盖层。主要发育和分布于华北晚前寒武纪的一些裂谷系－裂陷槽中，但各地沉积开始时间不一，后期遭受剥蚀程度不一。长期以来在地层划分、岩石地层命名、使用及年代属性上认识不统一，在一些地区认识分岐很大。笔者在岩石地层单位、地质特征认识的基础上，进行了全区（群、组）统一对比，明确了可作为华北晚前寒武纪沉积序列的代表性岩石地层单位及岩石组合特征；并介绍晚前寒武纪叠层石组合、微古植物特征性分子和已发现的宏观藻类和后生动物，论述了层型所在地区年代地层划分及层型以外各地层分区岩石地层单位年代属性的确定依据。     

宁樟高速公路湖北段建设用地地质灾害危险性现状评估

在对宁樟高速公路湖北段沿线一定范围的地质灾害调查的基础上，从其发育特征、分布范围及成因进行了深入分析，并结合地质灾害的稳定性和危害性进行了危险性现状评估，最后提出了防治对策建议，为拟建项目防治地质灾害提供了依据。     

上公山隧洞TBM掘进主要工程地质问题及施工对策

阐述了上公山隧洞TBM掘进过程中遇到的诸如断层破碎带、节理密集带、软岩大变形、岩溶、地下水等主要工程地质问题，并详细地介绍了相应的工程处理措施。     

河西走廊祁连山山前缺水区找水方向

本文根据近20年来在河西走廊从事水文地质工作所掌握的资料，结合前人研究成果，将山地与平原的接触关系归纳为3种类型，每一种类型都具有特定的水文地质条件，它们的共同特点是存在于山体与走廊平原之间的“叠瓦状”大型逆冲隐伏断裂带及其所派生的山麓中新生界皱褶，阻止了山区基岩裂隙水与走廊平原第四系松散岩类孔隙水之间的水力联系，使山林与走廊平原衔接地带地下水位突变，产生100～200m或更深的“地下跌水”，也正是这一原因，使历年来在这一缺水区的地下水勘察变得尤为慎重，正确找水方向在于根据山体与平原的接触关系的不同，因地制宜地开发利用地下水（泉水）资源。     

Conditioning Channel Meanders to Well Observations

Assessment of uncertainty in the performance of fluvial reservoirs often requires the ability to generate realizations of channel sands that are conditional to well observations. For channels with low sinuosity this problem has been effectively solved. When the sinuosity is large, however, the standard stochastic models for fluvial reservoirs are not valid, because the deviation of the channel from a principal direction line is multivalued. In this paper, I show how the method of randomized maximum likelihood can be used to generate conditional realizations of channels with large sinuosity. In one example, a Gaussian random field model is used to generate an unconditional realization of a channel with large sinuosity, and this realization is then conditioned to well observations. Channels generated in the second approach are less realistic, but may be sufficient for modeling reservoir connectivity in a realistic way. In the second example, an unconditional realization of a channel is generated by a complex geologic model with random forcing. It is then adjusted in a meaningful way to honor well observations. The key feature in the solution is the use of channel direction instead of channel deviation as the characteristic random function describing the geometry of the channel.     

The Area Between a One-Dimensional Ordinary Brownian Curve and a Straight-Line Approximation

For a fractal curve, the measured perimeter length increases as the ruler length decreases. When the perimeter of a fractal curve is traced with a given ruler size, there are areas between the straight-line segments and the true curve. If the underlying geometric rule for creating the fractal curve is known, then the size of the areas can be calculated. An equation has been developed for calculating the absolute value of the area between a straight-line approximation and the true curve for the random function ordinary one-dimensional Brownian motion. One potential application of the equation developed is in estimating the amount of ore loss and waste rock dilution that would occur in a mining operation as a result of the errors in the geologic model of the boundaries of an orebody.     

喀斯特地质灾害的形成条件及其环境背景--以贵州省为例

贵州喀斯特环境地质灾害类型多样、分布广泛、发性强，其发生、发育过程不但具有明显的季节性，且具有同步叠加、连续发生及交替出现等特点；地质灾害的危害程度、暴发频率也在逐年增大。其形成过程主要受岩性、地貌、灾害性降水和人类经济等条件影响。地球内动力地质作用决定了喀斯特地质灾害的环境背景，如广布的碳酸盐岩和陡峻的地貌特征等。特别是挽近期的构造运动对近、现代地质灾害具有明显的控制作用；人为活动改变了岩（土）体的平衡状态而导致环境地质灾害发生。     

吉林省龙井市后底洞金矿床地质特征及找矿思路

后底洞金矿床产于二叠纪柯岛组变质岩系与华力西期辉长岩体内外接触带。矿化类型为含金蚀变岩型，矿体受北东向断裂构造控制，矿床成因类型为次火山热液型。     

桃江王家冲锑矿床地质特征及其科技咨询服务

桃江王家冲中型锑矿床，赋存在上元古界板溪群五强溪组中段灰绿色板岩中，背斜翼部的层间剥离、破碎裂隙是矿床形成的储矿构造，东西向断裂Ｖ＿４、Ｖ＿５为控矿构造。矿区一般见２～３层矿，平均厚度１．２４ｍ，平均品位Ｓｂ４．９８％。矿石矿物主要是辉锑矿。矿床成因属燕山期中低温液型锑矿床。该矿床已有７０年开采历史，去年曾出现资源危机，矿山面临关闭。笔者应邀赴矿对井下未知矿体进行预测，旨在指导生产找矿。由于科技咨询与生产找矿紧密结合，短时间内就取得了找矿突破，解了矿山燃眉之急，延长了矿山生产服务年限，社会经济效益明显。