DIMINE软件在七宝山铅锌矿地质建模中的应用

在充分收集七宝山铅锌矿原始资料并对其进行电子化的基础上,借助DIMINE软件建立了七宝山铅锌矿的钻孔数据库、地表DTM模型、岩层和断层模型、矿体模型,并利用矿体模型进行约束,采用距离幂次反比法对矿体的空间品位进行估值,建立了品位块段模型。对品位块段模型进行了储量统计,并同实际勘探统计储量进行比较,结果表明该模型可用于七宝山铅锌矿生产阶段的资源评估、储量计算、动态储量管理、境界优化和计划编制等方面的工作。     

基于DIMINE矿山软件的品位建模

借助DIMINE矿山软件功能,利用地质勘探钻孔数据库,首先根据钻孔数据建立地下三维矿体模型;其次用普通克里格估值,先计算各个方向的实验变异函数,并根据计算出的变异函数进行理论变异函数的拟合;最后利用克里格估值将矿体模型转换成品位模型,并划分矿体对每个高程区间段进行储量计算。     

基于Surpac的矿床模型构建和资源储量估算——以冀北东坪金矿区转枝莲矿段为例

随着计算机技术的高速发展,"数字矿山"技术也日益成熟。基于Surpac软件,实现了矿体的三维可视化,建立了东坪金矿区转枝莲矿段地质数据库、三维地质模型和块体模型,并利用普通克里格法对金品位进行了估值,建立了矿体品位模型,同时进行了储量对比分析。分析结果表明,采用Surpac软件建立的模型可靠,估值精度较高,可为今后合理开发矿山资源提供科学依据。     

DIMINE软件在矿山地质模型更新中的应用

介绍了钻孔数据库的建立、更新、分类、查询及管理。同时讨论了根据坑道见矿点、钻孔见矿段及采空区范围更新及修改矿体模型,使模型随着开采状态动态变化,及时准确地反映实际情况。然后论述了样品数据库加入采场样品后,块体品位模型如何更新。最后阐述了如何运用DIMINE矿业软件进行储量分级报告。     

基于3DMine软件的复杂矿体三维建模及储量估算

数字矿山的核心任务之一是构建集成化的矿山真三维模型,其难点则是建立精确、完整的三维地质模型,即矿体建模和储量估算.为快捷地建立三维模型并能在其上进行开采设计及查明矿床资源储量,提出了基于3DMine软件的三维矿体建模及储量估算方法. 首先依据地质资料和钻孔数据建立了地质数据库和三维地表/矿体模型;然后将矿体模型分解离散为矿块组合模型,采用距离幂次反比法估算矿山资源储量.结果表明:软件可便捷地构建直观反映矿体形状、大小及矿体与储量块体空间相关性、连续性的真三维模型,并且能够为矿山设计与规划提供操作平台;与传统地质块段法相比,对样品点进行无偏估计的距离幂次反比法在软件上易于实现且结果较为可靠.      

低品位镍矿直接还原-磁选富集工艺半工业试验研究

为充分利用红土镍矿,详细阐述了低品位镍红土矿直接还原-磁选富集工艺技术。通过半工业试验,探讨研究了影响低品位红土镍矿冶直接还原-磁选富集的主要工艺技术参数,证明了该工艺处理低品位红土镍矿的可行性,实现了低品位红土镍矿的有效利用。     

平行断面法矿产资源储量估算的计算机实现与应用

根据我国传统矿产储量估算方法的特点,以平行断面法为切入点,对矿产储量估算系统原理进行了探讨,介绍了矿块体积和矿石储量计算方法。通过某铜矿山为例,介绍了在DIMINE矿业软件中应用平行断面法进行品位估计和储量计算的实现步骤。     

配矿强化中低品位红土镍矿选择性还原研究

以两种中低品位红土镍矿A(Ni0.97%和Fe40.09%)和B(Ni1.42%和Fe23.16%)为原料,探究红土镍矿中镍的赋存状态和分布规律,并通过配矿来强化直接还原焙烧-磁选的试验研究。结果表明,褐铁矿型红土镍矿中,镍多数赋存在主要矿物针铁矿晶格中,利蛇纹石中镍品位也较高;腐殖土型红土镍矿中,铁镁硅酸盐矿物含量为65%左右,镍品位较低;针铁矿含量约为30%,含镍品位较高。通过配矿可以减少铁镍比,配合添加剂可以抑制铁的还原,降低还原温度到1100℃左右,此时得到镍品位6%左右的镍铁精矿,镍回收率为92.08%。还原焙烧矿中镍被有效富集于γFe-Ni合金晶粒中,其它物相中含镍极少,实现了镍的选择性还原和富集。     

响应曲面法优化红土镍矿富集镍

以某含镍质量分数为1.54%,含铁质量分数为18.9%的褐铁矿型红土镍矿为研究对象,研究还原剂种类、用量、粒度及还原焙烧温度对红土镍矿中镍氧化物和铁氧化物选择性还原的影响规律。并根据Box-Behnke原理设计实验,建立镍品位的二次多项式模型,利用响应曲面法研究红土镍矿直接还原产品镍铁精矿中镍品位的主要影响因素,对模型方程进行最优值求解。结果表明,镍氧化物的还原反应对温度的敏感性高于铁氧化物的还原反应,镍品位及回收率对温度在1 000～1 400℃区间内呈正相关。还原剂用量及粒度对镍品位的影响在一定区间内存在峰值。结合生产实际,避免出现熔料,最优化求解结果为还原剂用量为4.6%(质量分数),还原焙烧温度为1 200℃,还原剂粒度为0.25 mm,镍品位为3.18%。经多次验证实验,该配比下进行还原焙烧得到的镍铁精矿镍品位平均值为3.2%,镍回收率为85%,误差为0.6%。     

缅甸达贡山红土型镍矿配矿工艺

随着不锈钢和电池行业的快速发展,对镍的需求也不断的增加,用来生产金属镍和镍铁合金的红土型镍矿得到了很大程度的开发。作为东南亚镍资源大国缅甸拥有丰富的红土型镍矿,深入了解红土型镍矿的地质特征及配矿工艺,合理开发利用镍矿资源,缓解我国镍资源紧缺现状。本文对红土型镍矿成矿机理及红土型镍矿生产工艺进行诠释,并对缅甸达贡山镍矿项目配矿方法及取得的经济效益进行详细介绍。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.