庙沟铁矿排土方案的改进

通过对原排土场设计方案及存在问题的分析,提出其改进方案,确保岩土从露天采场到排土场的流向科学合理,达到岩土运输功和排弃费用最低.     

One‐sided runs‐rules schemes to monitor autocorrelated time series data using a first‐order autoregressive model with skip sampling strategies

In some industrial or health‐related processes, it makes more practical sense to monitor either an increase only or a decrease only in the quality characteristic of interest. Consequently, in this paper, we propose four one‐sided Shewhart charts supplemented with runs‐rules to monitor the mean of autocorrelated normally distributed samples using a stationary first‐order autoregressive model. To counteract the negative effect of autocorrelation, we implement a sampling strategy which involves sampling of non‐neighboring observations to form rational subgroups. The Markov chain technique is used to derive zero‐state and steady‐state closed‐form expressions of the specific shift performance metric, ie, average run‐length (ARL). Moreover, we compute the expected ARL metric which evaluates each monitoring scheme based on all specified range of possible values of the shift parameter, or more specifically, from a global point of view and thus gives a different perspective from the specific shift ARL metric. We observed that the steady‐state improved w‐of‐w and the improved 2‐of‐(H + 1) schemes yield a better overall performance than their corresponding basic counterparts for all different levels of autocorrelation. A real‐life example is provided to illustrate the implementation of the monitoring schemes proposed here.     

A novel method for refining of acidic sludge and mixing with vacuum bottom to improve bitumen properties

In this study acidic sludge was refined by a novel method that involves neutralization and extraction of organic compound by a waste solvent. Study on refined sludge indicated that sulfuric acid and major of impurities were removed from sludge. Moreover, resin and asphaltene and accordingly ductility of sludge increased. In continue, different amounts of sludge residue were added to vacuum bottom for bitumen preparation. Test results indicated that sludge residue improved mechanical property and elastic modulus of bitumen. Thermal tests illustrated fine thermal stability of blends at production temperature. Also, aging data described reasonable durability for samples. Consequently, by this approach not only hazardous acidic sludge was eliminated from environment but also it improved mechanical properties of bitumen.     

拆除爆破建筑物倾倒可靠性验算方法

为了判断拆除爆破高耸建筑物能否倾倒,以设置坐标系的方法,通过几何关系求得建筑物倾斜时的重心位置和侧面轮廓线各拐点的坐标值,再用计算公式求出侧面面积,最后用面积矩法求出重心位置。将相关计算式和参数输入Excel表,可以便捷地对建筑物倾倒的可靠性作出判断。     

世界首套全底吹全热态连续炼铜技术生产实践

华鼎铜业发展有限公司先后经过三个阶段的改造形成了世界上首条全底吹全热态连续炼铜生产线,即底吹熔炼+底吹吹炼+底吹精炼。该工艺具有原料适应性强、整体脱杂优势明显,现场环境条件好、运行成本低等特点。介绍了全底吹全热态连续炼铜工艺和在运行过程中的生产实践。     

石墨润滑下人字闸门底枢摩擦副摩擦学性能*

为研究石墨润滑条件下各参数对人字闸门底枢摩擦副摩擦磨损性能的影响，采用UMT-2多功能摩擦磨损试验机进行销-盘摩擦副试验，模拟闸门底枢低速重载工况条件，研究不同摩擦速度、石墨粒径下不同表面粗糙度人字闸门底枢摩擦副的摩擦磨损性能。试验结果表明：在不同转速工况下，表面粗糙度为0.8 μm的摩擦副采用粒径10 μm石墨颗粒润滑时润滑性能最优，表面粗糙度为2.0 μm的摩擦副采用粒径21 μm石墨颗粒润滑时润滑性能最优；随着转速增加，摩擦副摩擦因数与磨损量均增加。研究表明，石墨粒径大小和摩擦副表面粗糙度共同影响摩擦副摩擦学性能，这为闸门底枢的固体润滑剂选择和摩擦参数设计提供理论依据。     

低伤害控水压裂工艺的应用

根据杏子川采油厂储层具体地质特征，引进低伤害控水压力工艺技术，通过现场施工，效果显著，使杏子川采油厂稳油控水和提高开发效果取得了重大突破，带来了良好的经济效益。     

双检数据上下行波场分离技术研究进展

随着海洋油气勘探开发技术的发展，水、陆双检海底接收的应用日趋广泛，上下行波场分离作为双检数据处理的关键技术，决定了资料处理品质及应用效果。在双检数据上下行波场分离技术的发展过程中，国内外学者提出了许多切实可行的技术方案。本文通过系统调研国内外相关文献，对上下行波场分离方法和技术进行了归纳和总结。首先基于波动理论，把双检数据与上下行波场联系起来，建立了双检数据标定和上下行波场分离的理论基础：水、陆检数据接收的波场分别为压力波场和质点垂直速度波场，可以分解为上行压力波场和下行压力波场及上行质点垂直速度波场和下行质点垂直速度波场；下行压力波场与下行质点速度波场振幅成正比，且极性相同，上行压力波场与上行质点速度波场振幅成正比，且极性相反。然后针对海底电缆/海底节点（OBC/OBN）水、陆检数据，建立了基于消除海水鸣震的双检数据处理技术。最后，总结出7种双检数据上下行波分离方法，包括：常数标定因子分离、频率—波数域分离、镜像分离、去虚反射分离、最优去虚反射分离、检波器脉冲响应分离和τ-p域分离等方法。双检数据上下行波场分离之前，首先要进行检波器脉冲响应校正；然后进行双检数据匹配和标定处理等，使水检数据中上下行压力波场与陆检数据中上下行质点垂直速度波场振幅和频率趋于一致，且由于下行压力和质点垂直速度波场极性相同、上行压力和质点垂直速度波场极性相反，陷波问题得到补偿，检波点端虚反射得到合理压制；最后实现最佳的上下行波场分离处理。     

某取水泵房沉井的施工实例

总结了某取水泵房沉井的制作、下沉、封底的施工工艺和相关事故的处理要点，对沉井的干式下沉和不排水下沉作了下沉系数验算，可供类似工程作借鉴。