高密度电阻率法在海底金矿含水构造探测中的应用

海底金矿上覆岩层中含水直接对矿床的开采构成威胁,选择山东三山岛金矿新立矿区海底-135m水平沿脉巷道,采用地球物理高密度电阻率法对该巷道635m测线以下200m深度范围内岩体中的含水构造进行了坑道探测,利用三种装置(温纳装置(Wenner)、偶极装置(Dipole-Dipole)、Schlumberger装置)进行实施,相互验证,取得了很好的探测结果.温纳、偶极和Schlumberger三种装置的视电阻率反演结果反映在测线(-135m沿脉巷道)以下至30m深度为一高阻层,表明自-135~-165m的岩体中已不含水或含少量的水;测线以下30~60m段为低阻层,反映-165~-200m的岩体中含基岩裂隙水;测线以下大于60m的地段为特高阻层,反映-200m以下岩体含水性逐渐变差.该探测结果与矿区水文地质结构调查分析结论具有很好的一致性,表明了坑道高密度电阻率法探测含水构造是可行的.     

Modeling the strain localization around an underground gallery with a hydro-mechanical double scale model; effect of anisotropy

This paper concerns the application of a finite element squared approach for modelling hydromechanical coupling in the simulation of gallery excavation in the context of radioactive waste repositories. The micromechanics of Callovo-Oxfordian claystone is modelled at the microscale, taking into account the interaction of different mechanical constituents and its interaction with pore fluid. In a framework of computational homogenization, the micromechanical behaviour is coupled to the macroscale boundary value problem of a poromechanical continuum with local second gradient paradigm. The simulations concern several cases of the “Transverse action” benchmark by Andra, in the context of which the model is used.     

基于倾角仪与测量机器人的异形桥变形监测研究

为研究影响异形结构桥梁变形的因素,分析不同测量手段反映异形桥变形的灵敏度,以吉林省延边朝鲜族自治州安图县二道白河镇美人松空中廊桥公园内空中廊桥为例,采用倾角仪和测量机器人联合的方式,在顾及荷载、风向和风速的作用下,测定廊桥的倾斜角和位移量,获取两套独立观测数据。通过正交试验分析荷载、风向和风速对廊桥倾斜程度的影响,并通过灵敏度试验分析两种测量手段反映廊桥变形的灵敏度。研究结果表明,倾角仪和测量机器人都能较高精度地反映廊桥变形且数据相近,倾角仪反映廊桥变形灵敏度更高,廊桥变形主要受荷载和风速影响。     

"坑道透视专家系统"的建立与应用

介绍了“坑道透视专家系统”的内容和应用实例，说明拉用该系统能够发挥专家特长，有效地进行坑道透视数据处理和探测资料解释工作，指导煤发生产。     

The youngest record of metriorhynchid crocodylomorphs,with implications for the extinction of Thalattosuchia

Here we describe an isolated tooth of a metriorhynchid crocodylomorph from the Hybla Formation (Aptian, Lower Cretaceous) of Rocca Chi Parra quarry (Montagna Grande, Calatafimi, Trapani Province), Sicily, Italy. The specimen shares with the Upper Jurassic taxon Plesiosuchus manselii a mediolaterally compressed conical tooth crown, noticeable lingual curvature, mesial and distal carinae with microscopic, rectangular contiguous denticles, strong distal curvature of the mesial margin, and the presence of weak 'carinal flanges' on the labial and lingual surfaces (which are preeminent at the mid-crown). This suite of morphologies is also present in an unnamed Valanginian (Lower Cretaceous) plesiosuchinan from France. However, the Sicilian tooth differs from these taxa in having more pronounced carinae, and faint apicobasally aligned enamel ridges. It also differs from P. manselii in having more extensive 'carinal flanges' on the labial surface. The specimen extends the known geological range of Metriorhynchidae and Thalattosuchia by approximately 7–8 million years. This overturns previous hypotheses of Metriorhynchidae becoming extinct early in the Early Cretaceous.     

Construction of grout curtain in karstic environment case study: Salman Farsi Dam

Salman Farsi is an arch-gravity dam. It is 125 m high and located on the Ghareh-Agaj River in Fars province, south of Iran. From the geological and hydrogeological point of view, this dam is one of the most complicated sites in Iran. Existence of 40 springs at the river level (including hot springs), and many faults and crushed zones are part of these complications. The dam site is famous for its numerous big caverns. Main characteristics of the rock mass are: (1) low permeable limestone of moderate to high strength, (2) high karstification generally localized around intersection of faults or discontinuities. The main purpose of grout curtains is to change the hydrogeological characteristics (reducing the permeability) of the rock mass. Constructing a grout curtain in a karstic environment with a high random distribution of karst features contains some uncertainties and surprises cannot be excluded. During the excavation of grouting galleries, some big caverns at both abutments were discovered. The volume of the biggest one (Golshan’s Cave) exceeds 150,000 m³. A large-scale underground geotechnical treatment is needed to improve the water tightness of the dam site.     

跨采巷道围岩结构稳定性亚分类及其应用

建立了反映跨采巷道具体稳定状态的围岩结构稳定性指标,以实测资料为样本确定出指标权值,采用模糊ISODATA 聚类分析方法得到结构稳定性亚分类模式,提供了结构稳定性实用分类方案,可应用于跨采巷道稳定性预测与支护设计。     

巷道围岩稳定性的判据及岩石分类

本文通过套筒致裂法测试巷道围岩应力及力学性质,并以此进行围岩稳定性分析和分类;提出了巷道围岩稳定性判据以及巷道围岩分类的原则;介绍了本稳定性分析方法在若干煤矿巷道围岩及立井井壁应力测试地点的应用。