黄铁矿热电性研究在庞家河金矿评价中的应用   总被引：2，自引：0，他引：2  

权志高  李占游 《陕西地质》1995,(1)

庞家河金矿载金矿物黄铁矿的热电性测量结果为：热电系数（α）均为正值，平均223．075μv／℃，属空穴型（P型）导电。根据热电系数数值求得的热电性参数数位集中在（50～70）之间，反映庞家河金矿矿体剥蚀程度不大，属中上部出露；相对矿化总长度的剥蚀百分比为30％～35％，并根据热电性参数求得矿体的总延伸深度L＝1204m，矿体的尖灭深度L0＝805m。该计算结果与后来进行的矿床勘探结果基本吻合。  相似文献   

Soil compacting displacements for two jacked piles considering shielding effects     

Luo  Zhanyou  Tao  Yanli  Gong  Xiaonan  Zou  Baoping 《Acta Geotechnica》2020,15(8):2367-2377

Shielding effects have a significant influence on the estimation of soil displacements for jacked piles, which have received minimal attention in previous studies. To include the shielding effects, a novel model was established for the soil compacting displacements of two jacked piles based on the strain path method and the source–sink method. The corresponding closed-form analytical expressions were also derived. Soil compacting displacements were calculated using the proposed method and the previous method, which disregard the shielding effects. The results showed that the soil displacements obtained based on the shielding effects are larger than those obtained when the effects are disregarded in the frontal direction, whereas the opposite results are obtained in the dorsal direction. The shielding effects have significant influence on the soil displacements in the frontal direction and those in the dorsal direction. Consequently, shielding effects should be included in the calculations of soil compacting displacements in the frontal and dorsal directions. An in situ test was also performed to investigate the reasonability of the proposed approach. Computed displacements were compared with the measured data. The results showed that the proposed model effectively predicts practical displacements, which demonstrates the validity of the proposed model. Further research is needed to verify the practicality of the described method.

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节理抗剪强度综合评价的试验研究   总被引：2，自引：0，他引：2  

杜时贵  胡晓飞  罗战友  梁晓丹  姜健 《工程地质学报》2008,16(1):89-97

选取不同吻合度自然节理试样,进行干燥状态和饱和状态的JRC-JCS模型和JRC-JMS模型试验研究。结果表明,在节理粗糙度系数的定向统计测量和尺寸效应分析,以及剪切过程衰减折减的基础上,运用JRC-JCS模型综合评价节理抗剪强度可靠性较好,考虑吻合度系数的JRC-JMC模型比JRC-JCS模型具更好的预测能力。  相似文献   

老挝万象盆地含盐岩系沉积特征与钾盐富集规律     

惠争卜  宋宪生  韩登宇  李卫  刘建军  李占游 《地质论评》2019,65(Z1):259-260

正钾肥是农业三大肥料之一,钾盐作为钾肥的主要原料,一直是中国最为紧缺的战略性矿产资源之一。中国是一个拥有13亿人口的农业大国,据资料统计,我国钾肥自给率约50%,钾肥的短缺制约了我国农业的发展。为践行国家"一带一路"倡议,我国企业走出去,在境外寻找钾肥生产基地,重点是对毗邻的老挝和泰国积极寻找优质钾资源,弥补我国钾盐资源缺口,稳定钾肥资源供给体系,为我国的粮食安全提供保障。  相似文献   

对海河流域地下水开采管理的思考   总被引：2，自引：0，他引：2  

阎战友 《地下水》2003,25(2):89-91

地下水是海河流域经济社会发展的重要水源 ,长期的过渡开采已造成诸多环境地质问题 ,如地面沉降、地裂缝、塌陷等。本文根据各区域水文地质状况及地下水开采情况的不同 ,对地下水的开采管理提出了一些想法  相似文献