徐州——宿州弧形双冲——叠瓦扇逆冲断层系统

郯庐断裂西徐州－－宿州地区存在丰一个向西突出的弧形构造,其东侧后缘为倾向腹地的双冲构造,前缘为背驭式的叠瓦扇。东西向的不老河断层和宿北断层将其分为具有不同发育特征的三段。这是华北板块与扬子板块斜冲对接过程中,由于双沟推覆体向ＮＷ的反向推力,由东向西间歇式跳跃发展而形成的。该构造后期还被前缘的反向断层,前渊的重力滑动构造和腹地的指状断陷盆地所复杂经。这是不同于Ｂｏｙｅｒ和Ｅｌｌｉｏｔｔ简单模式的一种     

护坡桩配筋面积计算新法

在从数学上分析圆形护坡桩设计计算式特点的基础上,提出了一套高精度、低耗时、原理清晰、理论依据充分的护坡桩配筋面积的算法。对比分析表明,本文算法明显优于现有的几种算法。     

桃林闪锌矿的矿物学特征

本文研究了桃林铅锌矿闪锌矿的化学成分、晶胞参数、红外光谱及物理性质《比重、硬度和反射率)等方面的待征。讨论了成分、结构与物理性质之间的关系,并探讨了矿床成因。     

高压旋喷技术在基坑护壁与止水工程中的应用

长沙天都大厦工程围护墙先后采用2套方案施工,实践证明,采用高压旋喷单管双液分喷法具有设备简单;投资少;操作容易,施工速度快;桩间搭接严密,固结体强度高;适用范围广等优点,尤其在处理软弱地基、基坑支护和止水工程中显示出有效性、可靠性和优越性。该方法再经进一步完善,将具广阔的推广前景。     

Dynamic Brazilian Tests of Granite Under Coupled Static and Dynamic Loads

Rocks in underground projects at great depth, which are under high static stresses, may be subjected to dynamic disturbance at the same time. In our previous work (Li et al. Int J Rock Mech Min Sci 45(5):739–748, 2008), the dynamic compressive behaviour of pre-stressed rocks was investigated using coupled-load equipment. The current work is devoted to the investigation of the dynamic tensile behaviour of granite rocks under coupled loads using the Brazilian disc (BD) method with the aid of a high-speed camera. Through wave analyses, stress measurements and crack photography, the fundamental problems of BD tests, such as stress equilibrium and crack initiation, were investigated by the consideration of different loading stresses with abruptly or slowly rising stress waves. The specially shaped striker method was used for the coupled-load test; this generates a slowly rising stress wave, which allows gradual stress accumulation in the specimen, whilst maintaining the load at both ends of the specimen in an equilibrium state. The test results showed that the tensile strength of the granite under coupled loads decreases with increases in the static pre-stresses, which might lead to modifications of the blasting design or support design in deep underground projects. Furthermore, the failure patterns of specimens under coupled loads have been investigated.     

一种新的流动注射在线共沉淀技术的研究及应用

建立了应用流动注射在线共沉淀分离富集火焰原子吸收法测定天然水样中痕量铬的价态分析方法。利用铬（Ⅲ）在碱性条件下与氢氧化镧形成共沉淀而与共存离子分离并得到富集，沉淀不需过滤，直接用稀盐酸从编织反应器（ＫＲ）中溶解并洗脱下来，用原子吸收测定。本体系的浓集倍率２２，检出限（３σ）０．８μｇ／Ｌ，相对标准偏差（ｎ＝１１）２．７２％，用水标样考察，分析结果与推荐值相符。该方法成功地用于天然水中铬的快速测定。     

中子活化分析在铼—锇法年龄测定中的应用

同位素稀释中子活化分析铼与感耦等离子体质谱法测定锇相结合，应用于辉钼矿及铜＿镍硫化物矿物的铼＿锇年龄测定，取得了满意的结果，扩大了铼＿锇测年法的应用范围。     

Correcting for crystal tilt in HRTEM images of minerals: the case of orthopyroxene

High-resolution transmission electron microscopy (HRTEM) is a powerful technique for crystal structure imaging and real structure analysis. It is theoretically possible to resolve inter-atomic distances with modern high resolution microscopes. In practice, however, the effects of sample and lens parameters such as crystal tilt and phase contrast transfer function (CTF) distort the images, reduce the resolution offered, and make image interpretation difficult. We have analyzed to what extent it is possible to reconstruct interpretable images of a tilted mineral by image processing.HRTEM images of orthopyroxene were simulated for a series of crystal tilts and thicknesses under Scherzer defocus condition using the parameters of a 400 kV microscope. The tilted images were reconstructed by crystallographic image processing. After correcting for crystal tilt, the images were as good as electron density maps calculated from X-ray diffraction structure factors.