围岩

It's very difficult to accurately determine the mechanics parameters of the caves, the boundary and initial conditions, the best construction scheme and support parameters before the caves are excavated, so there are a lot of blindness, diseconomy and hidden risks in the predesign of the caves.

由于在地下洞室开挖之前较准确地确定围岩的地质条件及相关的基本参数往往是很难的，故开挖方案和支护参数初步设计也存在许多盲目性，不经济性或安全隐患。

Ore deposit, have been studied detailly; the orebody pattern (sedimental bedded ores combined with stringer ores of hydrothermal origin) is also outlined; four metallogenic epoches are devided; the zoning of mineralization (including zones of ores, elements, mineral assemblages and temperature of mineralization) have been depicted; the main types of wall-rock alteration are characterized as propylitization of basic rocks and pyritization-sericitization-silicification of acidic pyroclastic rocks; the origin of ores and seven kinds of main minerals have been studied; and the metamorphism and deformation of orebodies is thought mainly due to the shearing and the intrusion of subvolcanic rocks

研究了七个矿化带特别是I号矿床的矿床地质特征，描绘了矿体的双层结构(沉积矿石与热液充填交代的细网脉状矿石)，划分了四个成矿期次，区分了矿化分带(包括矿石组构的成因分带、元素分带、矿物组合分带、温度分带)，指出了围岩蚀变的主要特征是细碧岩青盘岩化而石英角斑质凝灰岩黄铁绢英岩化；对矿石及七种主要矿石矿物的成因作了研究；探讨了矿体的变质、变形，指出韧性剪切及次火山岩侵入的热力作用和应力作用是导致矿体变质变形的主要原因

Metallization occurred in rock alteration, the alteration types are silication, seritization, pyritization and carbonation etc. Rock alteration is a good criteria for ore prospecting.

矿化垂直分带还表现在矿物组合、矿石结构构造、围岩蚀变、成矿温度、盐度、气液比、铅同位素比值等方面。

Large sets of engineering data in some tunnels were used as the training samples. The resubstitution method was introduced to verify the stability of BDA model and the ratio of mistake-discrimination is lower after the BDA model was trained.

以隧道工程中的大量实测资料作为学习样本进行训练，并利用回代确认估计法对训练后的模型进行检验，最后将该模型对隧洞的围岩情况进行预刚。

Resumptively, the construction of new structure will change the third stress field to the fifth stress field in surrounding rock, and bring the safety problem of existing structure and the complexity problem of newly-built structure.

概括地讲，新建结构物的施工会使围岩从原来的三次应力场演变到五次应力场，正是这种应力的演变导致了既有结构和新建结构的受力变异，造成既有侧的安全性和新建侧的复杂性问题。

Xiangshan volcano-intrusive complexes is the wall rock of the biggest volcanic-rock uranium ore deposit in China, and the main body is rhyolitic porphyroclastic lava, accompanied by hypahyssal or ultra-hypabyssal intrusive rocks such as dacite-porphyry and granite-porphyry Jiulongzhang volcano-intrusive complexes are dominantly rhyolitic welded tuff, accompanied by dacite-porphyry and quartz monzonite-porphyry, and so on, and the uranium resources are being assessed.

相山火山－侵入杂岩是华南地区最大的火山岩型铀矿赋矿围岩，其主体岩石为流纹质碎斑熔岩，浅成－超浅成侵入岩有英安斑岩、花岗斑岩等；九龙嶂火山－侵入杂岩的铀资源潜力尚待评价，主体岩石为流纹质熔结凝灰岩，浅成－超浅成侵入岩有英安斑岩、石英二长斑岩等。

Consequently, the evaluation of wall rock's stability is a momentous science research correlated with expressway's roading.

因此，围岩稳定性评价是与高速公路隧道施工和运营密切联系的一项极为重要的研究内容。

From the fields of regional crust-mantle structure, metallogentic settings, history of tectonic-magmatic activity, distribution of high antimony anomaly, characteristics of deposit, origin of ore-forming materials (including Sb, C, Si, S, solution and associated elements), black dikes, the relation of deposit and mantle metasomatism fluid is expounded by means of geology and geophysics. Xikuangshan antimony deposit is proved to be a typical vein deposit formed by mantle metasomatism fluid. On the basis of this knowledge, the prospecting criteria of blind orebody of the deposit are given as follows: extensive structuer which indicating the activities of mantle metasomatism fluid, change of host rocks (especially exsisting shale barrier bed), silication and carbonization alteration.

文中对地幔交代流体组成、性质、活动特点及其成岩、成矿作用作了综述与探讨；从锡矿山区域壳幔结构和成矿背景、地质构造-岩浆活动史、高锑地球化学场结构分析、矿床特征、成矿物质(包括Sb、C、Si、S、流体及伴生元素)、与成矿有时空联系的暗色脉岩等方面入手，利用地质、地球物理、地球化学手段多方面论述了矿床与地幔交代流体活动的关系，论证了锡矿山超大型锑矿的地幔交代流体成因，并以此为基础提出盲矿体地质找矿标志：即指示地幔交代流体活动的构造，尤其是具有成矿元素和碱质异常、热液蚀变的断裂构造；有利的岩石物理化学性质；硅化、碳酸盐化围岩蚀变等。

Slide breaking of shearing wedge block often occurs to elastic and plastic wall rockes around the circular roadways within the non-static head siress field in the direction perpendicular to its principal stress.

处于非静水应力场中的圆形巷道的弹塑性围岩常在其垂直于最大主应力的方向上产生剪切楔体滑移破坏。

Based on the analysis of REE geochemical characteristics of different geologic rocks in Pangxidong silver deposit, the genesis of granitic wallrocks and the source of mineralised material are discussed. It indicates that Yingqiao granite belongs to syntectic granite of mixed crust mantle source.

分析了粤西廉江庞西垌银矿床不同地质体岩石稀土元素地球化学特征，对矿床围岩花岗岩的成因以及矿床成矿物质来源进行了讨论，认为英桥花岗岩体为壳幔混合源同熔花岗岩。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。