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1.
简要介绍了国内外扩底技术现状、扩底灌注桩的特点、ＭＲＲ型基岩扩底钻头的结构衣技术参数，结合工程实例对ＭＲＲ１０００钻头的使用效果进行了分析。 相似文献
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LIU Yong-kun ZHOU Jia-xi HUANG Zhi-long WANG Jing-song YANG De-zhi DING wei CHEN Yuan-xing BAO Guang-ping 《矿物学报》2009,29(Z1)
The Zaibian mafic-ultramafic rock is located in the transitional zone of the Yangtze craton and south China fold system, where is the southwest of Jiangnan orogenic belt (Zeng et al. , 2003 ; Wang et al. ,in press). 相似文献
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D. Ask O. Stephansson F. H. Cornet M. V. S. Ask 《Rock Mechanics and Rock Engineering》2009,42(4):559-584
The primary objectives of this work are to (1) improve the understanding of the prevailing stress distribution at the Äspö Hard Rock Laboratory (HRL) in SE Sweden by employing an integrated stress determination approach, and in order to accomplish this (2) extend the existing stress integration methodology denominated integrated stress determination method (ISDM; Cornet in Comprehensive Rock Engineering vol 3, Pergamon Press, Oxford, pp 413–432, 1993a). The new developments of the ISDM involve a 12-parameter representation of the regional stress field in the rock mass (i.e., the full stress tensor and its variation with depth) that is applicable to hydraulic stress data (sleeve fracturing, hydraulic fracturing, and hydraulic tests on pre-existing fractures), overcoring data (CSIR- and CSIRO-type of devices), and to combinations of hydraulic and overcoring stress data. For the latter case, the elastic parameters of the overcoring technique may be solved in situ by allowing the hydraulic stress data to constrain them. As a result, the problem then involves 14 model parameters. Results from the study show that the ISDM effectively improves the precision of the prevailing stress field determination and that it is especially powerful for identification of consistencies/inconsistencies in an existing data set. Indeed, this is the very basic premise and goal of stress integration; combine all available data to achieve as complete a characterization of the mechanical stress model as possible, and not to identify a solution that fits only loosely the maximum amount of stress data. 相似文献
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Atsushi ANDO Naoki MITA Shigeru TERASHIMA 《Geostandards and Geoanalytical Research》1987,11(2):159-166
During the five-year period (April 1981 - March 1986), a series of fifteen rock reference samples, "Igneous rock series", has been prepared by the Geological Survey of Japan (GSJ). Based on the data available (published and communicated), consensus values for major, minor and trace elements have been derived; these values are presented for this second series of samples as well as for the first series of two samples, Granodiorite JG-1 and Basalt JB-1. 相似文献
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The Mount Morgan Au-Cu pyritic sulphide deposit occurs in a north-northwest trending belt of Middle Paleozoic volcanic rocks located in south-central Queensland. This volcanic belt forms part of the Yarrol Basin in the Northern New England Fold Belt of the East Australian Tasman Geosyncline. The host rocks for the deposit are a normal sequence of rhyolitic and dacitic tuff that have a north-northwest regional strike and easterly dips of 20° to 30°. The tuff contains thin units of cert, jasperoid and carbonate rocks. 相似文献
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油房河金矿V1、V2矿体产于中元古界高黎贡山群第二段第二层（Pt2gl^2-2）的韧性剪切带、破碎带内,矿体产出形态受层位、韧性剪切带及岩性控制,空间分布上与韧性剪切带的发育程度相关,决定了矿体的形态、产状、规模,并向深部变厚,组份分布较均匀,属于蚀变岩型金矿。 相似文献
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<正> 在实际勘探中,碳酸盐岩既可作为烃源岩,也可作为储集岩存在。确定碳酸盐岩中含有的烃类是原生的,还是从它处运移而来的,这在勘探实践中有着指导意义。为此目的,许怀先等用岩石热解分析方法做了大量研究工作。结果表明岩石中原油的热蒸发烃高峰温度和干酪根热解烃高峰温度具有显著差异:干酪根热解产烃高峰温度 T_(max)为400～600℃;原油热蒸发烃最高峰温度 T_(max)为300～400℃。由此可以区分原油的热蒸发烃和干酪根的热解烃,并进一步判定当最高热解峰温 T_(max)>400℃时,该岩石为烃源岩,而当T_(max)<400℃时,则为储集岩。对干酪根热解的进一步研究表明,不同成熟度的干酪根在不同的热降解温度范围内的产烃量是不同的。低成熟度的干酪根在450～600℃范围内所产生的烃占热解烃的5% 相似文献
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Transport parameters (diffusion coefficients, D(/), hydraulic conductivities, K(/), and retardation factors, Rf were experimentally determined in unsaturated soil, gravel, bentonite, and whole rock over a wide range of water contents, fixed at desired levels using the Unsaturated Flow Apparatus (UFATM). Effective diffusion coefficients in all media were found primarily to be a function of volumeric water cintent (/) and not material characteristics, except where the characteristics affect or determine water content. At high water contents, D(/) gradually declines as water content decreases, from 10-5cm2/s at a / of about 50% to 10-7cm2/s at a / of about 5%, followed by a sharp decline as surface films become thin and discontinuous, and pendular water elements become very small, from 10-7cm2/s at a / of about 5% to 10-10cm2/s at a / of about 0,5%. The several whole rock cores studied behaved similary. In aggregate material such as gravel and soil where the particles themselves have significant porosity, only the surface water content, not the internal water of the particles, contributes to the diffusion coefficient and hydraulic conductivity under unsaturated conditions, although the internal water is very important in retardation and other chemical effects. Experimentally determined K(/) compares favorably to van Genuchten/Mualem relationships calculated from laboratory-determined water retention versus matric potential data obtained on the same soils. Experimentally determined K(/) for whole rock appears to validate capillary bundle theory. Résumé. Diffusion et écoulement dans les graviers, les sols et les roches. Les paramètres de flux (coefficient de diffusion, D(‹), conductivité hydraulique, K(‹), et facteur de retard, Rf) ont été déterminés expérimentalement dans des formations non saturées (sol, gravier, benthonite et roche consolidée) pour une large gamme de tenneurs en eau (‹); ces teneurs en eau ont été ajustées aux valeurs désirées grâce à un dispositif spécial fournissant un écoulement non saturé (UFATM). Les résultats montrent que les coefficients de diffusion efficace de tous ces milieux sont d'abord fonction de la teneur volumique en eau et non des caractéristiques du matéeriau, sauf lorsque ces caractéristiques affectent ou déterminent la teneur en eau. Pour les fortes teneurs en eau, D(‹) décroit progressivement avec la teneur en eau, de 10 ч cm2/s pour un ‹ de 50% jusqu'à 10щ cm2/s pour environ 5%. Lorsque les films d'eau deviennent minces et discontinus et lorsque la fraction d'eau gravitaire devient trop faible, D(‹) diminue très brutalement de 10щ cm2/s pour un ‹ de 5% à 10⪞ cm2/s pour un ‹ de 0,5%. Plusieurs roches consolidées, testées sur carottes, se comportent de la même façon. Dans les agrégats, comme les graviers et les sols, où les particules possèdent une porosité propre, seule la teneur en eau intergranulaire, et non l'eau de l'intérieur des particules, contribue à la valeur du coefficient de diffusion et à la conductivité hydraulique, dans des conditions non saturées, bien que l'eau intragranulaire joue un rôle très important quant au retard et aux autres effets chimiques. Les Valeurs de K(‹) déterminées expérimentalement montrent un bon accord avec les relations de van Genuchten/Mualem calculées à partir des teneurs en eau de rétention, déterminées au laboratoire en fonction du potentiel matriciel obtenu sur les mêmes sols. Les valeurs expérimentales de K(‹) pour des roches consolidées semblent valider la théorie du faisceau capillaire. 相似文献
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蓟县地区雾迷山组风暴硅质岩沉积序列 总被引：2，自引：0，他引：2
从岩石学和沉积学方面对蓟县雾迷山组硅质岩沉积序列的研究表明,蓟县雾迷山组硅质岩沉积为典型的风暴沉积.蓟县雾迷山组广泛发育风暴沉积,在硅质条带状白云岩中发育的硅质砾屑具奇特的菊花状构造,这种构造形成于成岩作用后期,在岩石尚未完全固结成坚硬的岩石时期,遭遇风暴破坏,将原有的水平层理打碎,继而被风暴流搅起,风暴流的涡动使得岩石碎片或直立,或呈发散状,后经成岩作用保留了这种构造形态,与上下岩层形成典型的风暴沉积序列.通过野外与镜下观察并结合有机地球化学分析得出,蓟县地区雾迷山组硅质岩来源于海底热水活动.风暴硅质岩有两种沉积环境,对于异地搬运再沉积的风暴硅质岩,其沉积环境为潮上坪低能环境,即开阔台地中的泛溢沉积;而对于原地型的风暴硅质岩,其沉积环境应该是潮间带,因此推测其沉积环境为碳酸盐岩台地前缘斜坡. 相似文献
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四川盆地海相地层烃源岩特征 总被引：2，自引：0，他引：2
震旦纪至中三叠世四川盆地发育海相地层,共发育5套区域性烃源岩:上震旦统陡山沱组、下寒武统筇竹寺组、下志留统龙马溪组都发育泥质岩烃源岩,中二叠统栖霞组和上二叠统吴家坪组则为泥质岩和碳酸盐岩2种类型的烃源岩.研究发现:陡山沱组生烃中心位于重庆涪陵地区,筇竹寺组生烃中心位于成都-自贡地区,龙马溪组以万县地区和泸州-綦江地区为... 相似文献
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Probabilistic analyses provide rational means to treat the uncertainties associated with underlying parameters in a systematic
manner. The stability of a 734-m-high jointed rock slope in the west of Norway, the Oppstadhornet rock slope, is investigated
by using a probabilistic method. The first-order reliability method (FORM) is used for probabilistic modeling of the plane
failure problem in the rock slope. The Barton–Bandis (BB) shear strength criterion is used for the limit state equation. The
statistical distributions of the BB criterion parameters, for which comprehensive data were collected and statistically analyzed,
are determined by using distribution fitting algorithms. The sensitivity of the FORM model for the BB criterion is also investigated.
It is found that the model is most sensitive to the mean value of the residual friction angle (ϕ
r) and least sensitive to the mean value of the slope angle (β
f). It is also found that the standard deviation of joint compressive strength (JCS) causes the greatest difference in the
reliability index, which has the least sensitivity to the change in the mean and standard deviation of joint roughness coefficient
(JRC). 相似文献
13.
甘肃鹰嘴山地区岩体和隐伏岩体遥感信息提取研究 总被引：4，自引：2，他引：2
选择中国西北地区阿尔金山脉东段的鹰嘴山金矿及其周边地区为研究区,研究如何利用Landsat-7 ETM+遥感数据,实现对该区岩体和隐伏岩体信息自动提取。采用遥感信息多层次分离提取技术,通过对该区实测地物波谱数据和岩矿石多元数据的统计分析,得到岩体有关蚀变类型的遥感信息提取波段组合,并在对多波段遥感数据进行算术运算、比值和主成分分析的基础上,获取多幅经过信息增强处理的中间变量图像。结合对研究区已知岩体分布范围和特征的研究,从多幅中间变量图像中优选出主要包含岩体信息的最佳变量图像,并据此提取出该区的岩体和隐伏岩体信息。通过与已有地质资料的对比分析和野外实地验证,发现用该方法提取的岩体信息与实际情况吻合度高,效果较好。另外,对岩体信息提取误差产生的原因也进行了相关讨论。 相似文献
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JONATHAN SELBY 《Geology Today》1989,5(6):206-209
For years the world's most famous inselberg was plagued by the deleterious effects of human activity. Now a massive investment, stimulated by the international tourist industry, has ensured preservation of the rock's unique geomorphological features and its fragile ecology. 相似文献
16.
该区火山岩分为南北两带,二者既有一定的成因联系,也有一定的个体差异.据岩石化学成果估算出南带火山岩岩浆房顶部的近似深度为3.97km,而北带火山岩岩浆房顶部的近似深度为1.65km.表明岩浆房是向南倾斜的.该区基底属过渡壳海盆基底性质,火山活动具有类双峰特征,但又不是陆内裂谷.岩石建造及微量、稀土、同位素等地球化学特征反映具有活动陆缘特征.流纹岩Sr初始比值87Sr0/86Sr0=0.711130±0.00083,据"不同成因类型花岗岩类的(87Sr/86Sr)年龄和岩浆源区的关系图解",投入下部壳源型区,表明岩浆可能主要来自下部地壳. 相似文献
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蓟县地区雾迷山组硅质岩成因研究 总被引：3，自引：0，他引：3
中晚元古代华北地台处于燕辽拗拉谷的张裂期,有利于形成风暴流。蓟县雾迷山组广泛发育风暴沉积,在硅质条带白云岩中发育硅质砾屑具奇特的菊花状构造,这种构造形成于成岩作用后期,在尚未完全固结成坚硬的岩石时期,遭遇风暴破坏,将原有水平层理打碎,继而被风暴流搅起,风暴流的涡动使得岩石碎片直立,或者呈发散状,后经成岩作用保留了这种构造形态,与上下岩层形成典型的风暴沉积序列。通过野外与镜下观察并结有机地球化学分析得出,蓟县地区雾迷山组硅质条带白云岩发育典型的风暴沉积序列和挤压滑塌序列,风暴硅质岩具丘状形态,内部菊花状构造为近源风暴产物,其中硅质岩来源于海底热水活动。沉积环境推测为碳酸盐台地前缘斜坡。 相似文献
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阿拉善北大山岩带海西期中酸性岩40Ar-39Ar年龄及其地球化学特征 总被引：2，自引：0，他引：2
阿拉善北大山岩带位于阿拉善地块南缘,恩格尔乌苏缝合带以南。该岩带产出大量的海西期岩浆岩,包括基性-超基性岩、石英闪长岩、石英二长岩、石英正长岩及钾长花岗岩等一系列岩体。本文对该岩带的石英闪长岩及石英二长岩进行~(40)Ar-~(39)Ar测年,获得的坪年龄分别为277.0±3.8Ma、275.0±4Ma,系早二叠世侵入产物。元素地球化学研究表明,石英闪长岩具有高Al2O3、CaO、Mg#,低K2O、(La/Yb)N、ΣREE,表明其偏向于幔源的特点。石英二长岩具有高K2O、(La/Yb)N、ΣREE、Al2O3,低CaO、Mg#,表明其偏向于壳源的特点。结合微量元素分析与大地构造环境条件,得出了该期石英闪长岩与石英二长岩产出环境为二叠纪活动大陆边缘。 相似文献
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《岩矿测试》 2011年(第30卷)共6期的总目次。每一篇文献均可以在我刊网站首页的“过刊下载”中免费下载阅读。全年载文148篇,主编絮语6篇。 相似文献