矿产资源评价理论与方法评述

矿产资源评价是一项结构繁杂、功能综合、因素众多的复杂系统工程，矿产资源地质评价是基础，矿床技术经济评价、矿产资源经济评价是企业生产和社会主义市场经济规律所必需进行的，矿产资源环境评价是进行环境管理的重要手段，矿产资源综合评价是一种评价指标相对全面的评价方法。系统评述了矿产资源评价理论和方法的研究状况，预测了矿产资源评价的发展方向。     

万家寨引黄工程南干7~#洞膨胀岩洞段工程地质特性

膨胀岩易吸水膨胀、失水崩裂 ,其稳定性差。对隧洞的设计、施工和运行将产生综合性的影响。引黄工程南干 7号隧洞 2 895m长的洞段穿过膨胀岩地层。本文介绍了膨胀岩的特性及对引黄工程的影响。     

基于GIS的掘进工作面瓦斯地质信息可视化研究

随着现代信息技术的发展,将现代信息技术与煤矿安全管理的结合更多的应用于煤矿中。本文是基于GIS技术设计开发的掘进工作面瓦斯地质信息可视化系统。该系统是以组件式软件MapObject2.3和编程语言VB6.0作为开发技术,本文主要论述了系统具有的主要功能以及系统的开发技术路线以及使用技术。使得掘进工作面瓦斯地质信息更加便于管理并实现了信息的可视化,同时为煤矿安全生产起到指导辅助的意义。     

低电阻率油层在濮城油田的认识与应用研究

在储层岩性细、粘土矿物多、微孔隙多、颗粒亲水等原因上分析了低电阻率油层成因机理。对濮城油田多种成因类型的低电阻率油层进行了地质成因分析,并具体划分为粘土矿物成因型、岩性成因型、复合成因型。根据岩性分析图版,结合其它影响因素,得出了濮城油田多成因低电阻率油层的解释方法及规律,将这一规律应用于实践中,取得了显著的效果。     

地质导向技术综述：一种开发小层,断块油田的高新技术介绍

地质导向技术是根据地质导向工具提供的实时测量数据，用前导模拟软件进行大角度井、水平井钻井设计及指导钻井施工的一种综合方法。它能实时检测到地层变化以便及时对钻井设计做必要的调整，使钻头能最大限度保持在油层中钻进，在提高产层暴露程度、高效开发复杂油藏、节省钻井时间及提高采收率方面具有重要意义。该技术由地质导向工具和井场信息系统两大部分组成。井场信息系统的核心是前导模拟软件系统，它与地质导向工具一起成功     

现河地区滑塌浊积岩油藏勘探技术

滑塌浊积岩岩性油藏是现河地区最重要的岩性油藏勘探目标之一,勘探潜力巨大.文中对滑塌浊积岩的分布特征和成藏控制因素进行了分析,并将滑塌浊积岩划分为三角洲滑塌浊积岩和远岸深水浊积扇两种成因类型.在系统研究滑塌浊积岩的地震响应和地震相特征的基础上,提出了两种不同勘探程度下的滑塌浊积岩岩性油藏的勘探思路和应用技术系列,在该区取得了良好的应用效果.     

GIS在地质矿产资源评价中的应用

探讨了应用GIS进行地质矿产资源评价需要解决的主要问题,GIS地质图在评价中的作用,以及应用GIS进行地质矿产资源评价的方法和途径。     

Uncertainties in Geologic Profiles versus Variability in Pile Founding Depth

How the design and actual founding depths of foundations correspond to the variability of geological conditions has long been a concern. This paper evaluates the spatial variability characteristics of as-built and estimated founding depths of driven steel H piles with reference to the spatial variability characteristics of geologic profiles at a weathered soil site in Hong Kong. Spatial variability characteristics are evaluated in terms of variance and scale of fluctuation. The variability of three founding depth indicators, i.e., the depth of Grade-III bedrock, the depth of standard penetration test blow count “N” of 200 blows/0.3 m (SPT-200), and the depth of completely decomposed granite over the site was estimated. It is found that pile founding depths exhibit greater variations than those of the geologic profiles due to the presence of design model errors, judgment errors, and construction effects. The as-built founding depths are mostly between the SPT-200 profile and the Grade-III bedrock profile. The variances of as-built pile length are similar to those with depth of SPT-200 but less than those with depth of Grade-III bedrock. The scale of fluctuation of as-built pile length is on the order of 20 m when kriging is used and 10 m when kriging is not used, which are less than those with depths of SPT-200 and Grade-III bedrock.     

Evaluation of earthquake impact on magnitude of the minimum principal stress along a shotcrete lined pressure tunnel in Nepal

In situ stress condition in rock mass is influenced by both tectonic activity and geological environment such as faulting and shearing in the rock mass.This influence is of significance in the Himalayan region,where the tectonic movement is active,resulting in periodic dynamic earthquakes.Each large-scale earthquake causes both accumulation and sudden release of strain energy,instigating changes in the in situ stress environment in the rock mass.This paper first highlights the importance of the magnitude of the minimum principal stress in the design of unlined or shotcrete lined pressure tunnel as water conveyance system used for hydropower schemes.Then we evaluated the influence of local shear faults on the magnitude of the minimum principal stress along the shotcrete lined high pressure tunnel of Upper Tamakoshi Hydroelectric Project(UTHP) in Nepal.A detailed assessment of the in situ stress state is carried out using both measured data and three-dimensional(3 D) numerical analyses with FLAC~(3 D).Finally,analysis is carried out on the possible changes in the magnitude of the minimum principal stress in the rock mass caused by seismic movement(dynamic loading).A permanent change in the stress state at and nearby the area of shear zones along the tunnel alignment is found to be an eminent process.     

贵州石阡温泉大道滑坡的稳定性分析及治理措施

通过贵州石阡温泉大道滑坡的地质环境条件、地层特征及成因、评价、形态综合分析,采用折线滑动法对滑坡沿不同层面滑动的稳定性进行了计算,得出相应的稳定系数,提出了有效的滑坡治理措施。调查表明:位于斜坡地带的边坡,在工程施工、长时间暴雨冲刷等作用下,易使边坡体浅表层重量急剧增大,滑动面强度降低,易发生滑坡等地质灾害。