华北地区煤的显微组分结焦性热台试验

为探讨煤的显微组分的结焦性，对不同变质程度煤的镜质组、壳质组和惰性组分别进行了显微镜热台加热试验．在加热过程中，活性组分经历了３个明显不同的变化阶段，即变形阶段、胶质体形成阶段以及固化阶段．随煤变质程度的增加，镜质组的初变温度和胶质体形成时的温度逐渐增大，而固结温度变化规律不明显；壳质组在低变质阶段因受热而挥发掉，但随煤级增高其变形程度减弱；半镜质组在受热过程中也有变形和少量胶质体形成，而惰性组只发生微弱变化．在低变质阶段，活性显微组分形成的焦炭显微结构以各向同性为主；随变质程度的增高，焦炭显微结构中各向异性成分比例增大     

中国侏罗系煤成油若干问题

在阐述了煤成油的概念，总结和评述了煤生油显微组分，生油门限，生油范围和生油高峰等问题后，本文通过吐哈等盆地侏罗系煤生油显微组分组成特征，可溶有机质演化，成熟度和有机质丰度，油源及原油成熟度对比；含煤岩系中煤层和泥岩的厚度及总量和煤及泥岩最高沥青和总烃转化率的对比； 其族组成和煤成原油的族组成特征的对比，提出了中国侏罗系煤成油盆地中泥岩比煤层对煤成油田形成有大的贡献看法。     

河北小营盘石英—碳酸盐型金矿成矿地质特征

小营盘金矿赋存在稳定的缓倾斜石英脉中，但单纯的白色石英脉仅有微弱矿化，只有经过Ｓ懊断层剪切拉张破裂和叠加铁白云石化及硫化物蚀变的石英脉才能成为矿体，金矿体的顶底面常被铁白云石蚀变岩和糜棱岩所包裹，而且部分蚀变岩的金含量也达到工业品位，石英脉与蚀变岩作用构成矿体。因此，早期金成矿作用的时代大致与铁白云蚀变同期，含金铁白云石蚀变岩的δ＾１３Ｃ值平均为－４．１３‰，Ｐｂ－Ｐｂ等时线年龄为２７１１±２３８     

Study on the correlativity of earthquakes impact on cities

Introduction With rapid development and advancement of economy and society, lots of city groups or city belts with ex-tra-large cities as their centers have been formed in China. The regions these city groups lie in usually have well-developed economy, dense population, and are regional politics and culture centers. Some groups lie in the regions with high level of earthquake activity, such as the Surrounding Capital City Group with the centers of Bei-jing and Tianjin. Once a large earthqua…     

城市地震影响特征研究

首先根据历史地震目录，计算了我国34个省会城市所受到的历史地震影响. 这些城市的地震影响烈度分布特征表明，约53%的省会城市没有遭受过Ⅵ度以上的历史地震影响，遭受过Ⅶ~Ⅸ度影响的城市有44%；大部分城市Ⅵ度地震影响的发生频次均高于Ⅵ度以上地震影响；不同城市最大发生频次的地震影响烈度也不同. 为此，在确定城市地震防御烈度时，需综合考虑最大影响烈度和最频影响烈度. 本文还考虑到历史地震记录的不完备性，以福建省69个县级以上城市为研究对象，采用模拟地震目录的方法来研究城市地震影响的特征. 结果表明，不同超越概率水平下城市地震影响烈度在不同城市之间表现出较大变化，以50年超越概率2%作为城市特征地震影响烈度，可以作为城市地震防御烈度确定的依据，并据此对城市未来地震影响进行合理的描述.      

Estimating coefficients of volume compressibility from compression of strata and piezometric changes in a multiaquifer system in west Taiwan

This paper estimates the coefficients of volume compressibility from variation in compressible layer thickness and changes in piezometric heads by using detail ground surface surveys and a multilayer monitoring well at a selected site (Shigang) within the Choshui River alluvial fan in west Taiwan. The paper integrates various types of in situ monitoring tools, including leveling surveys, continuous global position system (GPS) stations, multilevel layer compression and groundwater pressure head-monitoring wells, to investigate the situation and progress of the subsidence problem in the region. The results from the cross-analyses of the measured data show that surface settlement caused by the compression of strata is between the depths of 60 and 210 m where the clayey stratum within 120-180 m was most pronounced and contributes up to 53% of the total compression. The results indicate that the clayey stratum is under normal consolidation. The results also reflect the fact that 20% of settlement contribution comes from the sandy stratum within 90-120 m; the elasto-plastic behavior of this sandy stratum is clear. The coefficients of volume compressibility of the clayey and sandy stratum analysed from the stratum's compression records; they were 6.38×10⁻⁸ and 5.71×10⁻⁹ m²/N, respectively. Ultimately, this parameter estimation would permit to control and predict land subsidence based on change in pressure head which are related to groundwater extraction.     

挤扩支盘桩极限承载力的预测

用双曲线方法对110根挤扩支盘桩的极限承载力进行预测,并与直杆桩预测结果进行对比。结果表明由于支盘桩受力性状复杂,加载前期和中期预测精度较高,后期较低,误差超过15%;支盘桩的沉降曲线出现台阶时预测值与实测值误差较大;支盘桩极限承载力的预测精度与工程地质条件和桩本身的参数密切相关,桩身参数和地质条件相同条件下各桩预测精度比较接近。总体上直杆桩的预测结果优于支盘桩。