高放废物处置库预选场地水文地球化学模拟     

郭永海  刘淑芬苏锐 吕川河 《地质与勘探》2003,39(6):64-67

阐明了研究区水地质条件及地下水化学特征；通过水地球化学计算，研究了地下水与固相间的反应趋势；模拟了地下水垂向流动过程中发生的水岩作用；进而从水地球化学角度对预选场地高放废物地质处置的适宜性作出初步评价。  相似文献   

In-situ Measurements of Cutter Forces on Boring Machine at Äspö Hard Rock Laboratory Part I. Laboratory Calibration and In-situ Measurements     

Z. X. Zhang  S. Q. Kou  X. C. Tan  P.-A. Lindqvist 《Rock Mechanics and Rock Engineering》2003,36(1):39-61

Summary This paper presents the testing methods used and the results obtained in an investigation of the cutter forces on a Boretec DS 1.6 boring machine during field boring in ?sp? Hard Rock Laboratory. Two button cutters, one front cutter and one gauge cutter, were used in the field measurements. A total of 6 strain gauges were bonded on the shaft of each cutter. And each group of two gauges was used to measure a one-orthogonal cutter force component, i.e. the normal force, tangential force, and side force, respectively. In order to measure the cutter forces successfully, a telemetry system composed of a transmitter and a receiver was employed to transfer the signals from the strain gauges to a computer.  A three-direction-loading system was employed in the laboratory calibration so as to solve the force-coupling problem appearing in the cutter force measurements. Correspondingly, a mathematical treatment of the force-coupling problem was performed. Then, by means of the established testing system, which was proved successful in the laboratory, the normal force, tangential force, and side force of the two button cutters on the boring machine were measured in the field. In addition, the penetration rate, thrust, and rotation speed of the boring machine were also recorded in the field. The results show the following. (1) A force-coupling phenomenon really exists and it should be considered. (2) All three directional force components always show quite a high peak value every few seconds. (3) The cutter forces of the front cutter are always much larger than the respective cutter forces of the gauge cutter. Moreover, as expected, the normal force of each cutter is much larger than the tangential force and side force of the cutter in question. Received October 5, 2001; accepted June 25, 2002; Published online November 19, 2002  相似文献   

Engineering geological evaluation of geological barrier rocks at landfills and repositories   总被引：1，自引：0，他引：1  

M. Langer 《Environmental Geology》1998,35(1):19-27

 A site specific evaluation of geological barriers is required for landfills and waste repositories. The waste-repository-rock system has to be taken into consideration for this. Since the geotechnical barrier in conjunction with geological barriers contributes considerably to long-term isolation of the harmful substances from the biosphere, it is absolutely necessary to use engineering geology and hydrogeological methods for a quantitative assessment of the barrier effect of the host rock and the geological environment. For a waste disposal mine, the load-bearing capacity of the rock, the protective properties of the surrounding rock formations and the geological stability of the area are important factors in a safety analysis, of which the geotechnical stability analysis is an important part. Such an analysis comprises an engineering geological study of the site, laboratory and in situ experiments and model calculations, long-term monitoring, and special geological and geochemical investigations. Existing geomechanical modelling techniques provide a useful tool to perform barrier integrity calculations and to design an underground disposal mine. As an example, the barrier performance of the rock salt of the Gorleben salt dome is demonstrated using various safety indicators. Received: 3 January 1997 · Accepted: 29 January 1997  相似文献   

2000-2040年我国高放废物深部地质处置初探   总被引：1，自引：0，他引：1  

徐国庆 《铀矿地质》2002,18(3):160-167

本简要介绍了国内外高放废物地质处置研究概况，探讨了我国高放废物地质处置研究阶段的划分，各阶段的研究目标，任务和研究内容以及各研究阶段的大致时间安排，提出了我国高放废物地质处置研究在2000－2040年的远景规划设想。  相似文献   

内蒙古高庙子膨润土作为高放废物处置库回填材料的可行性   总被引：16，自引：0，他引：16  

刘月妙  陈璋如 《矿物学报》2001,21(3):541-543

本文简述高放废物处置工程要求和缓冲／回填材料在高放废物深地质处置库中的作用及要求，介绍了内蒙古兴和县高庙子膨润土的性能，认为内蒙古兴和县高庙子膨润土矿床可作为高放废物处置库回填材料的供给基地。  相似文献   

Experimental Study Assessing the Role of Sedimentary Organic Materials to Control the Redox State of Ground Materials to Control the Redox State of Groundwater: Consumption of Dissolved Oxygen by Humic Acid     

Ken-ichiro Haysahi    Hideyuki Shibata    Mikazu Yui  Hiroshi Ohmoto 《Resource Geology》2001,51(1):45-54

Abstract: A total of 189 runs were completed to determine the rate of dissolved oxygen consumption in water by the reaction humic acid at 25°, 45°, and 65°C. Glass vial bottles were used as reaction vessels, and humic aicd and pure water of different intitial O₂ concentration was loaded with humic acid/water weight of 0.008 and 0.009. Vials were opened periodically to measure O₂ concentrations. The pH of the solution fluctuated in the early stages of the experiments and gradually decreased to a constant value. Dissolved oxygen concentration decreased, for example, from initial value of 12 mg/l to 9 mg/l at 25°C, to 5 mg/l at 45°C, and to 2 mg/l at 65°C after the reaction of 500 hours. Analyses of rates suggest that the reaction is first order, and rate constants are 8.42 × 10^-9 at 25°C, 2.22 × 10^-8 at 45°C, and 1.28 × 10^-7 moles m^-2 s^-1 at 65°C.  相似文献   

Pressurized grout applications in fractured tuff for containment of radioactive wastes     

D. R. Crouthamel  J. J. K. Daemen 《Geotechnical and Geological Engineering》1991,9(1):53-62

Summary Currently under study by the Department of Energy are the geologic and hydrologic characteristics of the ash-flow deposits under Yucca mountain at the Nevada test site. Of interest at this site is the potential for disposal of high-level radioactive wastes in the unsaturated zone of the densely welded portions of the tuffs. These studies include the preformance-assessment of barriers and seals for boreholes, ramps, drifts and shafts at the Yucca mountain site. In-situ tests on standard Type II Portland cement and microfine cement as grout materials have been performed on a similar rock type to Yucca Mountain's near Superior Arizona. The tests were performed in a vertical borehole drilled in highly fractured and densely welded tuff (brown unit of Apache Leap) through a series of pressurized grout applications. Packer flow tests prior to and after each grout application measure the effectiveness of the grout application in reducing the permeability of the rock surrounding the borehole. Overall the grout applications have reduced the permeability of the test hole by three orders of magnitude.  相似文献   

高放废物处置场断裂带稳定性遥感图象解译   总被引：1，自引：0，他引：1  

刘林清  余运祥 《华东地质学院学报》1994,17(3):242-248

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高放废物地质处置北山预选区芨芨槽岩块地质特征   总被引：1，自引：0，他引：1  

陈伟明  王驹  金远新  赵宏刚  李云峰  钟霞 《国外铀金地质》2009,(2):109-113

芨芨槽岩块是高放废物地质处置北山预选区新场地段中有利候选岩块之一。以高精度卫片解译、野外踏勘、地表工程揭露和节理测量为主要手段,对此岩块的岩石、断裂、节理带和节理等地质特征进行了详细调查和研究。芨芨槽岩块的主岩岩石类型单一,为黑云母二长花岗岩;后期有煌斑岩脉和石英脉贯人。断裂以NE向为主,共7条;多数断裂分布于岩块东西两侧边界,而岩块内部只有2条断裂。节理带以NW向为主,长度大于1km的有8条。据统计,岩块中节理有4个优势组,各优势组的产状和间距分别服从正态和负指数分布,节理平均间距为1．2-1．6m。断裂对节理的影响范围小于100m。此项调查和研究为处置库选址、性能评价和设计提供了必要的基础资料。  相似文献   

石漠化智能化解译系统初探   总被引：2，自引：0，他引：2  

谷花云  安裕伦  杨柏林  杨广斌  张宏群 《中国岩溶》2003,22(2):156-160

从石漠化智能化遥感解译系统的系统设计目的、系统的框架及功能等方面叙述了系统的初步建立,各部分的功能、专家知识库的初始化和优化等。利用石漠化专家对区域性的石漠化因子信息的认识和对岩溶地区野外地质现象的感知,并将其记录于计算机,建立专家知识库,最终用于石漠化信息的自动提取和石漠化分类。利用所建立的系统对贵阳市一部分区域进行石漠化信息的自动提取和石漠化分类,取得了较为理想的结果。   相似文献