煤矿充水条件分析及防治水措施建议

本文以申南凹煤矿为例,通过对煤矿矿区地质及水文地质条件综合研究,主要从充水水源、充水通道和充水强度3个方面对矿井现采煤层的充水条件进行分析,确定目前影响煤矿安全生产的主要水害情况,并对煤矿今后防治水工作提出建议,以期对矿井的安全生产提供参考。     

Experimental investigation of porous bearings under different lubricant and lubricating conditions

The performance of porous bearing under different lubricants and lubricating conditions was experimentally investigated in this study. In order to carry out the experiments, a new test rig was designed to determine the tribological properties of based sintered bronze journal bearings that were manufactured by powder metallurgy (P/M) techniques. To determine the effects of lubricating conditions with and without oil supplement (OS) on the tribological characteristics of these bearings under static loading and periodic loadings, some experiments were carried out using different lubricants. In the tests, pure base oil (SAE 20W50), two fully formulated commercial engine oils (SAE20W50) and lubricating oils with commercial additive concentration ratio of3% were used. The worn surfaces of test bearings were examined using optical microscopy. Experimental results showed that the change in friction coefficient was more stable and in smaller magnitude under static loading than that of periodic loading. In addition, the friction coefficient and the wear rate conducted with base oil resulted in higher values than those of fully formulated oils with and without OS lubricating conditions. The experimental results obtained in this study indicated that the correct selection of lubricant and suitable running conditions were very important on the tribological characteristics of porous bearings.     

2,2'-亚甲基双(4-叔丁基苯基)磷酰氯的制备及表征

以2,2'-亚甲基-双(4-叔丁基苯)酚和三氯氧磷为原料,通过滴加缚酸剂和催化剂三乙胺,反应生成了2,2'-亚甲基双(4-叔丁基苯基)磷酰氯。主要研究了加料顺序、时间、温度和溶剂量对反应产物和收率的影响。当滴加三乙胺,加入25 mL溶剂,反应时间2 h和反应温度为45℃时收率可以达到68%。对产物进行了傅里叶红外变换光谱仪(FTIR)、核磁共振仪(NMR)、质谱仪(MS)和差式扫描量热分析(DSC)表征,各项检测表明,合成的产物为2,2'-亚甲基双(4-叔丁基苯基)磷酰氯。     

川藏公路G317线H3滑坡稳定性分析

川藏公路G317线K1553＋776～K1553＋957处滑坡位于雍达曲左岸岸坡上。勘察了解了滑坡形成的过程,查明了滑坡的分布范围、滑坡所处的地质条件以及滑动面的位置,对该滑坡稳定性做了定性定量分析,认为该滑坡在持续降雨和地震的共同作用下容易产生次生滑坡,而且滑坡治理难度大,建议线路宜展线至对岸较稳定一侧。     

某商务中心工程质量创国优体会

本文通过创建国优项目的实例,从创优工程的选择、策划、实施、管控及成效等方面,总结本工程结合工程所在地的人文特色、因地制宜的工程质量创优做法。     

辽宁五女山山城高句丽遗址博物馆工程记录

文章以辽宁五女山山城高句丽遗址博物馆工程的项目背景设计和施工过程的简略但完整的介绍为解剖实例,对于国内目前小型遗址博物馆这一特殊博物馆类型的设计现状和各种制约条件进行了简要分析,希望引起关于影响建筑作品完成度的外部因素的探讨。     

Neubau der Kultur‐ und Gesellschaftswissenschaftlichen Fakultät der Universität Salzburg

Mit der Planung und Errichtung des Neubaus für die Kultur‐ und Gesellschaftswissenschaftliche Fakultät (KGW) der Universität Salzburg entsteht ein Gebäude, das dank seiner exponierten und herausfordernden Architektur, aber auch wegen der Problematik des anstehenden Baugrunds höchste Anforderungen an die Aus‐ und Durchbildung des gesamten Tragwerks stellt, über das zu berichten lohnt. Dabei bedingen die unterschiedlichsten gestalterischen und funktionalen Anforderungen des Gebäudes bauteilkonkret spezifische Antworten, die frühzeitig in der Planung an zudenken und bezüglich ihrer Wirtschaftlichkeit zu bewerten waren. Die entwurfsbedingt weitgehende Freistellung der mittleren Geschosse des Baus von Stützelementen erfordert die Ausbildung weitspannender Tragwerke in den Obergeschossen, wobei hier nur begrenzt Platz für die Erzielung statischer Höhen zur Verfügung stand. Andererseits mussten die konzentriert angreifenden, beträchtlichen Lasten der Obergeschosse mit weit gespannten Gründungskonstruktionen verteilt und in den begrenzt tragfähigen Baugrund abgeleitet werden. The new building for the Faculty of Cultural & Social Sciences of the University of Salzburg — A remarkable building with an exceptional supporting structure. Due to its prominent and provocative architecture as well as because of the difficult ground conditions the new building for the Faculty of Cultural & Social Sciences (KGW) of the University of Salzburg becomes a building that requires the highest standards for the development and reali zation of the static superstructure, which is worth to mention. The most different design and functional requirements of the building call for component‐specific answers which had to be tackled early in the design and to be assessed regarding their economics. The design‐related extensive clearance of the middle floors from supporting elements requires the construction of large‐span supporting structures in the upper floors leaving only limited space to achieve static heights. Contrary to that, the immense acting forces of the upper floors had to be distributed through large‐span foundations and transferred into the inadequate loadbearing ground.     

Statistical Programs for High Speed Computers

Eight-run two level factorial and fractional factorial designs are examined from two points of view: (1) the number of levels which must be changed in performing the design, (2) the effect of a first order time trend on the main effects. It is found that only a few run orders are desirable from these viewpoints and thus randomization of the runs is likely, in general, to lead to an unfavorable sequence.     

Least Squares Analysis of Experimental Design Models by Augmenting the Data with Side Conditions

One method of analyzing an experimental design model is to impose side conditions on the observational equations and then to solve the “reduced” model by least squares. The author demonstrates another method, which is not widely known: augment the data with the side conditions and then solve the “augmented” model by least squares.     

HPAM／柠檬酸铝胶态分散凝胶形成条件研究

采用一种简化的实验程序测定胶态分散凝胶（ＣＤＧ）的转变压，用测得的转变压值作为评价参数，考察由ＨＰＡＭ、柠檬酸铝、硫脲、氯化钾组成的ＣＤＧ的形成条件及相对强度。所考察的形成条件包括ＨＰＡＭ的来源和浓度，柠檬酸铝和氯化钾的浓度，ｐＨ值，绝大部分实验工作在４０℃和ｐＨ＝７．０的条件下进行，用一组实验考察了温度的影响（７０℃和４０℃）。