煤矿软岩巷道顶底板剪切变形破坏机理

通过石嘴山一矿38区＋600m轨道巷表面收敛监测及变形破坏的研究，总结出了变形破坏特征。以矿山压力假说为前提，对巷道围岩典型破坏特征作出理论推断，建立巷道顶底板的力学模型，并应用关键层理论、块体理论、弹性力学对巷道变形破坏进行理论分析与求解，得出了巷道顶底板发生剪切破坏判定条件，并用FIAC加数值模拟验证其正确性，为深部巷道支护提供了新的理论依据。     

From deep basin gas to diagenetic trap—An example from the Yulin Gas Field in the Ordos Basin

In the updip portion of the Yulin Gas Field in the Ordos Basin, there are no any structural, stratigraphic and sedimentary lithologic seals. Using thin-section petrography, ultraviolet fluorescence microscopy, micro-thermometry and Raman microspectrometry, this paper finds out the diagenetic trap and studies the diagenetic history of this field. It was revealed that three phases of diagenesis and hydrocarbon charging happened in late Triassic, late Jurassic and the end of early Cretaceous respectively. In the first two phases, acid geofluid entered the reservoir and caused dissolution and cementation. Although the porosities had been increased, further compaction accompanying re-subsidence resulted in tight sandstone and conglomerates. Till the end of the early Cretaceous, bulk of gas migrated into the tight reservoir. Cementation, however, kept on in the updip portion of this field due to low gas saturation and formed the diagenetic trap. The mechanism for gas accumulation was changed from deep basin gas to diagenetic trap, which offers a sealing condition that can retain gas for much longer time.     

兰州地区深基坑支护技术探讨

分析兰州地区深基坑支护的设计和施工现状,探讨适合于兰州地区的深基坑支护技术.分别介绍土钉墙支护、土钉加预应力锚杆联合支护、框架预应力锚杆支护技术的作用机理,结合工程实例说明其在兰州地区的应用.实践证明,这3种支护技术适合于兰州地区.当基坑深度小于8.0 m时,采用土钉墙比较合适;当基坑深度在8.0~10.0 m之间时,可以考虑采用土钉加预应力锚杆的复合支护结构;当基坑深度大于10.0 m时,选择框架预应力锚杆支护结构更加合理.     

活性炭纤维作电极的高级电化学氧化技术对直接深蓝L-3RB的矿化

以活性炭纤维作为新型电极,采用高级电化学氧化工艺(AEOPs)对直接深蓝L-3RB(DDBL-3RB)进行了矿化研究.AEOPs过程包含了两种不同的电化学过程--电Fenton和光电Fenton过程.60 mg/L的含50 mmol/L Na2SO4的DDBL-3RB溶液被用于矿化研究,结果表明光电Fenton过程具有最高的初始总有机碳去除率以及脱色率,这两种高级电化学氧化过程的机理都可以归结为Fe2 和电生H2O2反应所产生的羟基自由基对DDBL-3RB的矿化降解.     

确定低渗岩心渗透率随有效覆压变化关系的新方法

低渗储层岩心在有效上覆压力增大的过程中会表现出较强的应力敏感性。提出了一种定义应力敏感系数的新方法,通过室内物理模拟实验,分析得到了应力敏感系数与初始渗透率的关系式。结果表明,用该方法定义的应力敏感系数不受实验中所测数据点个数的影响,并且与实验岩心所受的最大围压无关;用二重乘幂函数式可表征出任意初始渗透率随有效覆压变化的关系,能方便地确定地层条件下储层渗透率,并能对油气井产能作出正确评价。应用该方法可以计算非均质油气储层开发过程中任意渗透率的变化动态,为建立低渗变形介质油气藏渗流模型及进行数值模拟奠定了基础。     

Systematics and zoogeography of the deep‐sea hyperbenthic family Arietellidae (Copepoda: Calanoida) collected from the Sulu Sea

A faunistic survey of the deep‐sea hyperbenthic copepods in the Sulu Sea, which has a deep basin and is connected via shallow straits with the Pacific and the South China Sea, was carried out in November and December 2002, using beam trawls and a mid‐water trawl. Two new genera and four new species of the primitive calanoid family Arietellidae are described. A new genus Metacalanalis shows intermediate characteristics between those of Metacalanus Cleve, 1901 and Pilarella Alvarez, . Another new genus, Protoparamisophria, is closely related to Paramisophria Scott, 1897, but exhibits more plesiomorphic states in the female genital system and appendages. Two new species of the genera Paraugaptiloides Ohtsuka, Boxshall and Roe, and Sarsarietellus Campaner, 1984 are the second and the third species, respectively, for these genera. This discovery enhances the validity of these rare genera, and sheds light on the geological history of the Sulu Sea and the evolution of the Arietellidae within it.     

城市污水深度处理在水循环、水环境和水资源可持续利用中的作用

介绍了城市污水深度处理的内涵及其在水循环、水环境和水资源可持续利用中的作用。同时指出，提高城市污水深度处理普及率，使再生水成为城市水源不仅是保持健全水循环的良策，而且对建立循环型社会更有积极意义。     

血气分析深入图像在新生儿肺炎病人中的应用（附40例报告）

为了提高对低氧血症状态的分析和动脉血供氧能力的判断，对４０例出生后１ｈ至１５ｄ住院的新生儿肺炎病人的血气分析数据进行了深入图像分析．均采取股动脉或桡动脉血，检测用丹麦产ＡＢＬ６２０型血气分析仪，试剂及计算机软件全部由丹麦雷度公司提供．４０例中，ＣｔＯ２（动脉血氧含量）下降２９例（７２．５％），ＳＯ２（血氧饱和度）下降２０例（５０．０％），ｐＯ２ａ（动脉血氧分压）下降２５例（６２．５％）．在ｐＯ２ａ正常的１５例中经深入图像分析有８例Ｐｘ（氧张力）均低于正常，这表明低血氧症的实际例数应为３３例，占总数的８２．５％．４０例中ｃｔＨｂ（总血红蛋白）下降１９例（４７．５％），ｃｅＨｂ（有效血红蛋白）下降２２例（５５．０％），Ｏ２Ｈｂ（氧合血红蛋白）正常仅１１例（２７．５％）．４０例中３５例（８７．５％）Ｐ５０下降，氧离曲线左移，表明血红蛋白释氧能力下降，３３例（８２．５％）Ｐｘ低于正常，表明有动脉血释氧能力下降，在临床上需要给氧．