平朔露天矿太原组11^#和9^#煤层的沉积环境分析

平塑露天矿的露采煤层,即１１＾＃和９＾＃煤层是上石炭统太原组Ⅱ－Ⅲ层段扇三角洲－泻湖及扇三角洲－潮坪环境的产物。厚４ｍ的１１＾＃煤层形成于扇三角洲－潮坪环境中,厚１５ｍ的９＾＃煤层形成了扇三角洲平原,扇三角洲前缘（北西部）以及覆水较深的泻湖（中南部）环境中。     

Analysis of the compression behavior of artificial lumpy composite materials

The landfills are dumped without any compaction and have a relatively open structure, which is similar to that of the granular materials. However, the original dumped material might be gradually transformed into a lumpy composite structure because of the influence of the climate. As a result, the lumps are randomly distributed in the reconstituted soil. In the presented study, the compression behavior of the lumpy composite soils was analyzed within the homogenization framework. Firstly, the volume of the composite soil was divided into four individual components. The inter‐lump porosity was introduced to account for the evolution of the volume fractions of the constituents, and it was formulated as a function of the overall porosity and those of its constituents. A homogenization law was then proposed based on the analysis of the lumpy structure together with a numerical method, which gives a relationship for tangent stiffnesses of the lumpy soil and its constituents. Finally, a simple compression model was proposed for the composite lumpy material, which incorporates both the influence of the soil structure and the volume fraction change of the reconstituted soil. The predictions of the model were validated against the test results, and the stress distribution within the lumpy composite was assessed. Copyright © 2016 John Wiley & Sons, Ltd.     

露天矿边坡自动化监测关键技术研究

为及时掌握露天矿边坡变形规律,基于现代监测技术、网络通讯技术和计算机技术为一体,建立一套实时动态反映边坡位移变形和应力变化的自动化监测系统。通过对海州露天矿北帮边坡的连续性监测,结果表明：海州露天矿属于蠕变型滑坡,目前正处于局部变形、整体稳定的状态。系统的构建实现了边坡位移和应力的高精度、自动化、连续性监测,将为露天矿边坡灾害的动态预警和安全决策的及时制定提供有效的技术支持,对边坡的灾害防治提供理论依据。     

“Fe-Au-Sb-S”体系中金迁移规律的实验研究

在黔滇桂微细浸染型金矿地质研究及前人实验研究基础上设计了７５℃含碳的“Ｆｅ－Ａｕ－Ｓｂ－Ｓ”热液开放流动体系实验，测定带出溶液之ｐＨ及Ａｕ、Ｆｅ、Ｓｂ含量，研究Ａｕ、Ｆｅ、Ｓｂ的迁移条件及相互关系。探讨本区主成矿期之后叠加热液活动中金与锑的行为及金异常与锑异常既密切共生，在空间上又有所偏离的原因     

Numerical modelling of the driving response of thin‐walled open‐ended piles

The driving response of thin‐walled open‐ended piles is studied using numerical simulation of the wave propagation inside the soil plug and the pile. An elastic finite element analysis is carried out to identify the stress wave propagation in the vicinity of the pile toe. It is found that the shear stress wave has the highest magnitude above the bottom of the soil plug. Below the bottom of the soil plug, the vertical stress wave has the highest magnitude. Although the shear stress wave propagating in the radial direction is similar in magnitude to the vertical stress wave at the bottom of the soil plug, it decays rapidly while travelling downwards. The highest vertical stress at the bottom of the soil plug appears after the vertical stress wave interacts with the shear stress wave travelling in the radial direction. Initially, the vertical stress wave propagates with the dilation wave velocity in both the radial and vertical directions. After it interacts with the shear stress wave, the vertical stress wave starts to propagate with the shear wave velocity in the radial direction and with the axial wave velocity downwards. It is concluded that at the bottom of the soil plug, the interaction between the waves travelling in radial and vertical directions is important. The capabilities of several one‐dimensional pile‐in‐pile models to reproduce the driving response given by a two‐dimensional axisymmetric finite element model is studied. It is seen that when the base of the soil plug fails, a one‐dimensional pile‐in‐pile model can be used to achieve results in agreement with the finite element model. However, when the pile is unplugged, where the base of the soil plug does not fail, a reduced finite element mesh that permits the radial wave propagation inside the soil plug must be used. Copyright © 2001 John Wiley & Sons, Ltd.     

A World Model of Chemical Denudation in Karst Terrains

In this paper, I develop global karst chemical denudation models using chemical equilibrium equations. Theoretical karst chemical denudation rates are calculated as soil carbon dioxide concentration varies from 10^?3.5 atm to 10^?1.0 atm, temperature varies from 0°C to 30°C, and annual runoff varies from 500 mm to 3,000 mm. Both open and closed karst solution systems are examined. The Drake (1980) and the Brook-Folkoff-Box (1983) soil pCO² equations are used to develop chemical denudation models for different carbonate rocks (limestone and dolomite), climate (tropical, temperate, and arctic/alpine terrains), and karst solution type (open and closed systems). The major conclusion is that the karst solution type, least known in the past karst studies, is an important factor in controlling chemical denudation rates.