长山壕金矿东露天采场境界重新圈定及其稳定性分析

露天矿山边坡稳定性是矿山安全生产的主要影响因素之一。针对长山壕金矿东露天采场逐渐转入深部开采后出现的多处区域不同规模的滑坡及不稳定现象,对原东露天采场境界进行重新圈定,并对重新圈定的露天境界边坡进行了稳定性分析。详细介绍了东露天采场境界方案比选、道路参数的选择与设置、露天境界的重新圈定及边坡稳定性分析等。结果表明,优化后的露天境界边坡整体处于稳定状态,满足安全生产要求。     

紫木凼金矿露天转地下开采边坡稳定性数值模拟研究

露天转地下开采过程中以露天采坑作为尾矿库使用,最主要的技术问题是保证边坡的长期稳定。针对紫木凼金矿露天转地下房柱采矿法开采特点和难点,采用FLAC-3D分析软件,对不同回采顺序对边坡稳定性的影响进行三维数值模拟分析,研究采场顶底板和坡面围岩的变形、塑性区和应力分布特征及规律。该研究不仅揭示了露天转地下开采过程中边坡复杂应力场变化规律,弥补了现场实测中存在的不足,而且对采场地压控制也具有一定的指导意义。     

紫木凼金矿露天坑底氧化矿回采及空区处理实践

紫木凼金矿露天开采已结束，边坡已并段，而边坡围岩倾角、倾向与边坡的倾角、倾向基本一致。因此，露天坑底氧化矿开采时，容易因为采动的影响而在露天边坡造成滚石，甚至滑坡。文中论述了露天坑底氧化矿回采及空区处理技术，该技术提高了作业效率、保证了生产安全、增强了开采的经济合理性。     

露天采坑做尾矿库时防渗工程的施工措施

介绍大岭矿露天采矿结束后,为实现露天采坑做尾矿库并保证地下矿正常开采,对露天坑防渗加固时针对边坡脱落、坡面不平、坡度大以及施工范围大、体量大、混凝土输送距离长等具体情况,采取的边坡整形,混凝土泵送、浇筑,土工膜铺设和保护层施工等措施。     

露天矿山边坡变形监测及工程实例

在分析露天矿山边坡特点的基础上，介绍了露天矿边坡变形监测的重要性，以及变形监测的任务、内容、常用的观测方法与手段，并结合大冶铁矿边坡实例探讨了边坡滑坡预报的具体措施。     

露天采石场滑坡类型分析与防治措施

在露天采石场的开采过程中,边坡稳定性至关重要。从采石场边坡滑坡的类型入手,根据采石场的作业特点,综合分析了影响露天采石场边坡稳定性因素,在此基础上,针对性地提出了适合采石场边坡滑坡的防治措施,以减少露天采石场在开采过程中滑坡灾害的发生。     

银山矿露天边坡稳定性分析

露天边坡稳定性受岩性、岩体结构、水文地质、边坡形态和爆破等多种因素影响。露天矿常见的边坡失稳,滑坡等地质灾害直接威胁露天采场的正常生产。为研究银山矿现有边坡的稳定性,建立了Dimine软件三维模型,采用工程地质分区、极限平衡法分析边坡各种破坏模式下的受力状态,以边坡滑体上的抗滑力和下滑力之间的关系评价边坡的稳定性,分析结果表面银山矿总体边坡较稳定,南部后续开采过程中需加强现场巡视与边坡监测,及时消除安全隐患。     

露天采场高陡边坡监测技术研究现状与发展途径

现如今,人们对于资源的需求越来越大,这也致使能源开发变得更加严峻,矿山开采成为人们关注的重点。通过对国内外露天采场边坡监测技术现状的研究,逐步了解了目前能够监测露天采场高陡边坡稳定性的监测技术方法,总结出各类技术目前所存在的问题,结合问题提出相关的解决措施,从而让露天采场高陡边坡监测技术的有效应用,能够一定程度上避免滑坡等地质灾害的发生,从根本上保障人员安全以及财产安全,让监测工作彰显出有效性。基于此,本文主要阐述了露天采场高陡边坡监测技术现状,并积极探讨露天采场高陡边坡监测技术的发展途径,希望能够为大家带来一些参考。     

某露天矿山边坡变形体治理方案研究

随着露天矿山开挖深度的增加而导致变形体滑坡,从而造成对露天采场的安全开采的严重困扰,影响矿山的安全生产。根据矿区的地质背景试分析影响该露天矿边坡稳定性的自然因素和人为因素,同时利用Slide数值模拟软件对其进行模拟,针对研究中出现的问题,制定了三套边坡治理方案,提出了相应的防护措施,并根据综合费用进行对比分析,最终推荐方案二为优选方案。该露天矿边坡治理方案对我国露天矿山的安全生产具有一定的参考价值和指导意义。     

模糊综合分析在穆利亚希北矿边坡稳定性中的应用

大型露天矿山边坡稳定性一直是采矿生产中值得关注的问题，本文在制定了露天矿边坡分级标准和影响因素，采用降半梯形隶属度函数和Delpli法分别确定连续型和随机型变量的隶属度，利用专家评分制度确定各因素的权重，构造了二级综合评判分析模型。通过穆利亚希北矿2号坑南北边坡分别进行工程分析，结果表明穆利亚希北矿2号坑北部边坡处于一般稳定状态，南部边坡曾在雨季发生大面积滑坡，造成生产安全隐患，必要时采取一定的支护措施，该评价与实际情况较为符合。     

自然坡统计法在锰矿露天边坡工程中的应用

就自然坡调查统计法在露天边坡稳定性分析中的应用,简述原理,分析在国内矿山露天硬岩边坡工程中应用现状与存在的问题,针对锰矿软岩露天矿厚层表土覆盖特点论述其应用前景与方法,进一步完善并拓宽了自然坡统计法地锰矿边际工程中的应用。     

密云石灰石矿边坡角优化设计的边坡工程依据

在工程地质调查、岩石力学试验与边坡稳定性评价基础上对密云石灰石矿原设计边坡角进行优化，并给出边坡角优化条件下的采矿终了平、剖面图。优化后的设计从采矿角度是可行的，从生产角度是安全的，从经济角度是合理的。     

Centrifuge Modeling of Slope Instability

This paper demonstrates the use of a centrifuge modeling technique in studying slope instability. The slope models were prepared from sand, and sand mixed with 15 and 30% fines by weight, compacted at optimum water content. The validity of the modeling technique was confirmed using slope models of different heights, inclinations, and soil types. The soil behavior was studied under triaxial and plane strain conditions, and the extended Mohr-Coulomb failure criterion was found relevant for expressing the strength of unsaturated compacted soil based on the angle of internal friction and apparent cohesion. The Bishop’s circular mechanism, together with the extended Mohr-Coulomb failure criterion, was able to simulate the slope failure reasonably well. The rainfall of different intensities was then induced on the 60° stable slopes of sand with 15% fines. It was found that the failure of slope under rainfall may be interpreted as a reduction in apparent cohesion. The centrifuge tests also allowed the rainfall intensity-duration threshold curve (local curve) to be generated for the test slopes, and the accumulated rainfall corresponded well to some of the reported field observations.     

Slope analysis in short-term memory.

Presents procedures for transforming dichotomously scored data from short-term memory experiments into slope measures for evaluation by analysis of variance techniques. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Neural Networks for Slope Movement Prediction

This article presents the use of neural networks for the prediction of movement of natural slopes. The aim is to predict velocity changes of a moving soil mass using climatological and physical data, such as rainfall and pore water pressure, which are used as input parameters in an artificial neural network (ANN). The network is designed to function as an alarm and is a decision‐making tool for persons in charge of landslide monitoring. The raw data were obtained from a continuously monitored landslide, located in Sallèdes, near Clermont‐Ferrand (France), and include daily precipitation, evaporation, pore water pressure, and landslide velocity values. The various networks used in this study are two layer perceptrons trained using the Levenberg‐Marquardt algorithm, based on backpropagation of error. The most sophisticated model presented in this article was developed by cascading two recurrent networks of the same type. This model permits a satisfactory 3‐day prediction of landslide velocity if quality data from continuous measurements are available. A simple example of the calculation of a safety factor for an unstable slope shows how neural techniques may be coupled to good advantage with purely mechanical models.     

全球定位系统在矿山边坡变形监测上的应用

全球定位系统(GPS)已被广泛应用于测量和导航领域。它在矿山边坡精确实时观测及其建筑物变形观测上也已被证明是一种很有价值的工具。     

Probability and Risk of Slope Failure

This paper aims to demystify the use of risk assessment as a decision management tool and present a methodology that places quantitative risk assessment within reach of every geotechnical engineer, even for routine engineering assignments. In particular, we propose using quantification of expert judgment (i.e., subjective probabilities) as a practical alternative for determining probability of slope failure. The writers present a semiempirical relationship between factor of safety and annual probability of failure that permits estimation of slope failure probabilities with relatively modest effort. The case study for a tailings dam shows that risk assessment based on quantification of expert judgment provides a framework to arrive at rational management and engineering decisions related to dam safety and other geotechnical problems. Using the semiempirical relationship presented here, practicing engineers can use this helpful tool by applying their current skills.     

露天边坡对地下采场覆岩稳定性影响的数值模拟研究

以某矿山露天转房柱法地下开采为研究背景,根据现场调研获得的岩土力学参数,利用FLAC3D等软件进行三维建模[1],对倾角为40°时边坡高度为90m的地下采场上覆岩层位移与应力响应特征进行数值模拟分析。研究结果表明:在露天终了边坡高度为90m倾角为40°时,地下开采完后采场上覆岩层受到开挖的扰动,稳定性降低,塑性区面积已经发育至坡面,整个岩体处于临界破坏状态,不利于矿山的安全稳定,因此建议该矿山露天终了边坡高度不超过90m。