铜山口铜矿坑内钻勘探的生产实践

随着铜山口铜矿地下深部基建结束，坑道探矿存在安全事故隐患、地质取样质量无法保证的问题，为了加快生产探矿，发挥坑内钻优势，弥补坑道探矿不足，购置了3台坑内钻进行探矿。通过在主矿体生产探矿及周边扫盲增储、尖灭矿体探边摸底、零星小矿体追寻、超前探水、指导巷道掘进方向等应用，结果表明，坑内钻具有操作灵活机动，易掌握，缩短了生产探矿时间，节约探矿成本，作业现场安全等优势，保持了三级矿量的动态平衡，确保了生产持续稳产发展。     

Using a Water Balance to Determine the Source of Water in the Flooding Underground Mine Workings of Butte

Abstract.  Nearly 10,000 miles (16,000 km) of underground mine workings began flooding on April 22, 1982 when the large pumps used to dewater the mines of Butte, Montana were shut off. In the first few months, water levels in the workings rose hundreds of meters. Flooding continues to this day at a slower rate, nearly 25 years later. An early evaluation of the water chemistry in the flooding mines suggested that the initially poor water quality was the result of flushing of a reservoir of stored acidity and metals. However, a detailed water balance for the Berkeley pit, underground workings, and associated mining features suggests an alternative explanation. During the early period of mine flooding, acidic surface water from the deactivated heap leach operations and nearby acid rock drainage were routed into the empty Berkeley Pit, and thence drained downward and outward into the underground mine workings, causing widespread degradation of water quality in the underlying workings. After 21 months, the hydraulic gradients in the system reversed, causing a change in the direction of ground water flow and a gradual improvement in water quality of the mine shafts.     

边坡滚石水平抛掷距离的多元分析

边坡滚石水平抛掷距离是研究露天边坡组成的重要依据之一，它关系到边坡安全和生产作业安全。本文在多因素多水平试验数据基础上，通过变量的相关性分析，找出影响滚石水平抛掷距离的显著性因素，为垂直下落高度ｘ和边坡坡面角ｙ，并通过多元正交多项式回归，在考虑ｘ与ｙ的交互作用下得出了函数关系式Ｌ（ｘ，ｙ），并对其应用问题进行了讨论。     

石人沟露天转地下过渡Ⅰ区采场结构参数研究

针对石人沟铁矿露天转地下过渡期开采Ⅰ区地下采场结构参数问题展开了深入研究。通过建立有限元数值模型，对Ⅰ区9种不同方案的地下采场结构参数进行了数值模拟，得出了地下开采时矿房和边帮的应力、应变情况。在此基础上，从安全和经济角度出发，建立综合模糊评判模型，通过方案对比、综合评判，最终得出了合理的矿房结构参数，为确保矿山在地下采场和边帮稳定的前提下安全、经济的生产提供了理论依据。     

基坑开挖的三维动态模拟分析

采用三维空间弹塑性有限差分法对基坑施工过程中基坑的塑性破坏区域的发展情况进行动态模拟分析,从而对基坑周边土体的稳定性和支护参数做出综合评判,为基坑设计施工提供科学依据。     

人工挖孔悬壁桩在基坑支护工程中的应用

人工挖孔悬壁桩在基坑支护工程中应用目前不是很多 ,但它有许多优点 ,施工方便 ,对周边影响小 ,质量易控制 ,抗水平力大 ,桩间砌拱砖二次挡土 ,能有效降底工程造价。     

南京市茶南基坑监测及成果分析

通过时南京市茶南基坑支护结构的深层水平位移、沉降、基坑水平位移、支撑轴力监测，得出了基坑周边水平位移及深层土体的水平位移随时间的变化曲线；周边建筑物的沉降随基坑开挖的变化关系；支撑轴力随时问的变化曲线。并时这些变化曲线进行了研究分析。     

基桩自平衡法承载力检测试验在深基坑中的应用

在深基坑的基桩竖向承载力检测中,经常遇到场地条件、加载吨位受限制的情况,导致传统静载荷试验无法开展。基桩竖向承载力自平衡法可较好解决深基坑中传统静载方法受限的局面,本文结合工程实践对基桩竖向承载力自平衡法进行研究,并指出自平衡法在工程运用中存在的一些问题,对基桩自平衡法静载试验的推广应用具有一定的参考价值。     

基坑支护及地下结构工程中格构基柱的施工方法

本文结合实例对基坑支护及地下结构工程中格构基柱的施工进行了介绍,其施工方法的特点体现在：基坑支护结构的支撑柱与基础桩一起,在基坑土方开挖前施工,采用钻孔灌注桩的施工方法;在制作钻孔钢筋笼前,先制作好钢结构桁架,采用起重机吊装并焊接在钢筋笼上部,随着钢筋笼一同沉放到位;基坑逐层开挖后,逐道焊接支撑梁钢筋与钢格构,支撑柱成为基坑支护结构的一部分,并可成为地下室结构柱的骨架。     

Investigation on transverse defect and cavitation depth in ferrous pipe using melt spun FeSiB ribbon as magnetostrictive sensing element

The investigation addresses the scope of rapidly quenched Fe₈₀Si₈B₁₂ ribbons as magnetostrictive sensor (MsS) material to generate guided waves in galvanised iron pipe and evaluation of defects with different geometries and dimensions. Enhancement in the effective defect size (EDS) of transverse and pit type defects increased the MsS signal. However, the backwall echo showed opposing trend (transverse: reduced and pit: increased) with increase in dimensions of these defects. Such behaviour of backwall intensities has been correlated to different type of guided wave strain field distributions around these defects and reflection coefficients.