永平水泄铜钴矿控矿因素

水泄铜钴矿区地质条件较为复杂,控矿因素较多,通过分析认为主要受断层及岩性控制,地层初始富集,构造及区域变质作用提供通道及热源。水的循环、溶解作用形成热卤水成矿。     

Collapse of caves at shallow depth in Gaziantep city center,Turkey: a case study

This paper focuses on an investigation of the possible causes for the collapse of limestone caves in Gaziantep, Turkey. The city contains a lot of man-made caves, at a shallow depth, of various width and length. These caves were mainly excavated to provide work or storage space. As the city has been growing fast with increased population, many structures were constructed over these caves. Recently, two caves collapsed and five houses were damaged. These caves are all made of limestone and it was observed after the collapse that the limestone was saturated with water due to sewer pipe leakage and surface water. Tests were carried out on the limestone and it was determined that the compressive strength of limestone decreases by about 50% and the tensile strength decreased by about 80% when saturated with water. It was concluded that the reduced strength of the limestone combined with additional loads due to the factors mentioned above seem to be the main reason for these collapses.     

南秦岭凤凰山地区元古代构造基底特征

依据在原划武当岩群中获得的 1 6 86± 4 5Ma (锆石U -Pb)同位素测年资料 ,结合岩石学、岩石地球化学及区域地层对比 ,从中解体出姚坪岩组。通过岩石学、岩石地球化学、构造特征、变质变形特征研究及形成环境探讨认为 :南秦岭凤凰山元古代武当岩群 (包括姚坪岩组、杨坪岩组 )变质火山岩系为古—中元古代时期多岛洋构造环境过渡基底建造 ;耀岭河岩组浅变质火山岩为本区Rodina事件的产物。该成果对南秦岭构造基底的组成、发展、演化研究具有重要意义。     

遗传算法在边坡抗震稳定性分析中的应用

根据遗传算法的思想和拟静力瑞典法基于圆弧滑动面的假定，提出一种用遗传算法搜索最危险滑动面及其对应的最小安全系数的方法。该方法模拟了生物遗传进化过程，克服了传统方法容易陷和局部极小值的缺点，是一种全局优化算法。并通过一个工程实例对其进行了验证。     

Estimation Of Sensible Heat Flux From The Surface Temperature Wave And One-Time-Of-Day Air Temperature Observation, Part Ii – Heterogeneous Surfaces

By means of the algorithm presented in Part I of this study, the temporal course H(t) and the daily mean H of the sensible heat flux H can be determined from measurements of the thermodynamic surface temperature (as a function of time) and from a one-time-of-day air temperature observation. Inaddition to these temperatures, one needs estimates of daily mean wind speed,of the roughness lengths of momentum and heat transfer, and of the displacementheight. In Part I, the algorithm was derived for areas with homogeneous surfaces,i.e., with uniform surface temperature, and the method was verified with measurements taken during several field campaigns. The root mean square error for the temperature difference between surface and air, in the comparison between measurement and model, amounted to one or two kelvin, and the error of H was 10 to 25 per cent. The method can be used to determine the sensible heat flux from measurements of surface temperatures by satellites, but can also be applied to ground based measurements.In Part II, the procedure is generalized for areas that consist of various surface types (sub-regions) with different surface temperatures, and can be usedwhen only a few (at least one) air temperature measurements per day are available over only one of the different sub-regions. This generalization should allow improvements to the estimates for H(t) by means of temperature measurements from, e.g., NOAA/AVHRR or LANDSAT/TM, taking into account the heterogeneity of the area contained in one METEOSAT pixel. Criteria are given as to whether effective (areal mean) surface temperatures and roughness lengths may be used for the computation of H or if the above mentioned generalized procedure has to be applied. The new algorithm is verified by measurements sampled during the field campaigns EFEDA 91 (Spain) and HIBE 89 (Hildesheimer Börde in Germany), and by using synthetic data (due to the lack of measured data) for one further combined surfacetype [soil and water (lakes)].     

抗滑桩间土拱力学特性与最大桩间距分析

抗滑桩最大桩间距确定的基础理论至今未建立起来，工程实践中仍依赖专家经验。本文从方桩桩间土拱形成的原理、力学特性论证入手，较全面地分析了桩间土拱的受力、变形，力的传递和土拱破坏瞬间的最大桩间距。并建立了最大桩间距平面计算模型。     

赣西北修水—永修地区滑脱构造的基本特征

赣西北修水-永修地区的盖层系统中具备多层次、多级别滑脱构造，本文重点阐述了该滑脱构造的基本特征，并对其形成时代及形成了探讨，认为该区早期属于挤压体制，晚期则属于伸展状态下的重力滑脱体制，并提出印支-燕山期板块碰撞寺形差异及九岭山体不对称挤压是诱发滑脱构造形成的主要因素。     

塔里木北部地区岩石物性参数测试和区域层滑系统的确定

为了定量地研究塔里木北部地区区域的层次结构．拆离构造，特别是同油气地质、圈闭构造密切相关的沉积盖层中的层滑倾滑和推覆滑覆等各种构造的形成机制，对该区沉积盖层进行了较系统的岩石物性和岩石力学标本采集和测试（包括三轴参照实验）．依其参数结构特点和地质、物探资料，划分出４套７层区域性层滑系统，并与研究程度较高的中、下扬子区的物性参数、岩性组合和构造特征进行综合对比．最后还进一步阐明了塔里木北部地区特征的前列式冲断构造和含油气局部构造等，均受到这７层区域层滑系统的制约．     

邢台震源区波速比异常与地震的关系

通过对忻州─泰安人工地震测深剖面Ｐ波、Ｓ波的联合解释，得到沿剖面不同地质单元隆起区与裂陷区、震源区与非震区的速度和波速比结构．鲁西隆起和太行、山西隆起为较均匀的成层构造，地壳厚度分别为３２ｋｍ和４０－４３ｋｍ，波速比为１．７４．中段裂陷区构造变化较大，地壳厚度约３０－３３ｋｍ，波速比为１．７５－１．７７．邢台地震区上地壳下部和中地壳出现高波速比１．７７的异常，与裂陷区东的１．７３形成明显的差异．由此推测，地震的发生不仅与震源区的构造有关，更主要是与震源区岩石的性质有关。