矿井地质工作方法浅析 --以开滦荆各庄矿为例

通过 对 荆各 庄矿 构 造条 件的 基 本规 律的 分 析,查 找 造成 工作 失 误的 原因 ,阐 述 对井 田 地 质条 件 的 再 认识 ,揭示总 结交 流 矿井 地质 工 作的 基本 方 法。     

国际性区域经济合作进展效果评价

随着世界范围内区域集团化实践的扩展和深入,对区域集团化进展效果的评价成为国际学术界关注的热点问题。为了加强对国内开展地区经济技术合作的理论指导和实践总结,对有重要借鉴参考意义的有关研究成果进行初略概括和总结,主要从区域发展总体效果、区域集团化的贸易效应、投资效应与国际产业和技术转移的区域效果四个方面对主要研究结论和争议观点进行归纳分析。     

鼻咽癌放射治疗前后的CT表现对比分析

鼻咽癌是常见恶性肿瘤之一。为了提高对鼻咽癌放射治疗前后ＣＴ表现的认识与诊断,本文回顾性对比分析了有完整病史资料及病理结果,并经ＣＴ检查的鼻咽癌者８８例的放射治疗前后的ＣＴ表现,继而评价放射治疗对鼻咽癌的治疗效果,从而确定是临床治愈,好转或复发,给临床下一步治理提供可靠的依据。     

辽宁二道沟金矿床矿物地球化学特征

对二道沟金矿床矿物学的详细研究和对比表明,该矿床中低温热液矿物组合和低温热液蚀变十分发育,与典型的冰长石－绢云母型浅成热液金矿的矿物组合十分相似,属于与流纹熔冉及其火山碎屑岩密切相关的浅成热液型金矿床。     

辽宁二道沟金矿床稳定同位素地球化学研究

对石曲中流体包裹体的氢氧同位素研究表明,二道沟金矿床含矿热水溶液的δＤ为－７１‰－－１０２．５‰,δ＾１８ＯＨ２Ｏ为１．３５‰－６．７‰,它们落入２００与３００℃时大气降水与火山岩发生水岩交换的演化线所夹的区域内,表明热水溶液主要来自源于大气降水的地下水,而不直接来源于岩浆热液。     

Use of rhodamine WT with XAD-7 resin for determining groundwater flow paths

A passive sampling system for use with rhodamine WT (RWT) in groundwater tracing experiments was developed to assist in the characterisation of groundwater flow paths. Amberlite XAD-7 resin was found to be suitable for adsorption of RWT, which can then be extracted using an ethanol/water mix and analysed fluorometrically. Batch and column experiments showed that XAD-7 resin has a high RWT capacity. The adsorption was slightly dependent on pH, but was always above 75% under batch conditions. The resin had a high percentage mass recovery at flow velocities around 1.5 m/day, but this decreased with increasing flow velocities. Desorption of RWT off the resin in water is dependent on the flow velocity of water and the time after the peak RWT has passed. The mass of RWT extracted from the resin bags correlated very well with both the RWT mass flux in the water and the peak concentrations observed in the monitoring wells in a field experiment. The results of resin bags were reproducible in the field with a mean coefficient of variation equal to 16%. This method has been successfully applied to two field situations with different flow velocities to indicate groundwater flow paths. Electronic Publication     

CT在肝癌LP－TAE术后的应用价值（附30例）

作者对３０例原发性肝癌ＬＰ－ＴＡＥ治疗前后有ＣＴ检查的病例进行分析，讨论了碘油选择性沉积在肿瘤内的机理．ＬＰ－ＴＡＥ术后肿瘤区域四种成份的ＣＴ表现．碘油在肿瘤内的三种分布类型及其意义。重点讨论了肝癌ＬＰ－ＴＡＥ术后ＣＴ检查，可以从以下几方面对疗效观察提供帮助，即肿瘤大小变化、碘油聚积量及分布情况、肿瘤区密度变化、子结节的发现和治疗效果、术后并发症的发现等．     

平安驿井下地温的震例分析

本文介绍了平安驿井下地温的概况，总结分析了１９９４年共和几次中强地震和１９９５年７月甘肃永登地震震前该测点的前兆特征并通过震例分析归纳出短临异常特征及映震指标。     

Mechanics of the interaction between a nuclear-waste disposal container and a buffer during discontinuous rock movement

The study of the complex geomechanical interactions that take place within a borehole environment of a nuclear-waste disposal vault is crucial to the long-term safety and efficiency of a waste emplacement scheme. This paper presents a theoretical investigation of the interaction between a container shell and the surrounding buffer region which can be induced by discontinuous movement at a fracture plane which intersects a disposal vault borehole. The theoretical studies presented in the paper illustrate the influence of factors such as the mechanical properties of the buffer, surcharge loads on the surface of the buffer, and characteristics of the buffer-container and buffer-rock interfaces, on the stresses that are generated in the container.