采矿优化决策的有效途径—决策支持系统

简要介绍了决策支持系统的基本概念和结构，阐明了决策支持系统是采矿优化决策的有效途径，分析及讨论了该系统的研究现状、存在问题和研究方向。     

人工神经网络在采矿优化决策中的应用

本文在分析现行采矿优化决策方法的困难的基础上，探讨了人工神经网络在采矿优化决策中的各种可能应用，并对其未来的发展提出了可能的方向。     

2，6－双（5－硝基－2－糠叉）环己酮的制备

用５－硝基糠叉二醋酸酯与环己酮在６０％Ｈ３ＰＯ４溶液中缩合制得标题物。反应混合物在１００℃下搅拌反应５ｈ得６１％的２，６－双（５－硝基－２－糠叉）环己酮。分别经ＩＲ、１ＨＮＭＲ、ＭＳ、ＵＶ、ＴＬＣ和元素分析进行了表征和鉴定。     

一种新型的缓倾斜多层矿体采矿技术

针对传统缓倾斜多层矿体的采矿方法 ,如全面法、中深孔落矿下盘漏斗法和爆力运搬法等 ,生产能力小、劳动强度大、安全性差、成本高等缺点 ,从云南锡业公司松树脚锡矿“大马芦”矿段的实际开采技术条件出发 ,提出了一种新型颇有特色的缓倾斜多层矿体的采矿方法———深孔合采井下矿废分离连续采矿法。它采用大直径深孔合采矿岩、井下矿岩集中分离、连续采矿等技术 ,变革了传统的分采工艺 ,有效地克服了传统采矿方法的弊端 ,为缓倾斜多层矿体的高效、低耗和安全开采提供了新的技术方案。     

悬浮颗粒对砂岩储层吸水能力影响评价

悬浮颗粒含量和粒径是砂岩油藏注入水水质控制的主要指标之一,评价固相颗粒含量和粒径大小对注水地层吸水能力的影响对于确定合理注入水水质指标十分重要.利用正交试验原理,通过系列实验,系统评价了注入水中固相颗粒含量、粒径、岩芯渗透率及注入孔隙体积之间的相互作用及其对储层渗透性能的影响,利用非线性回归分析技术,通过回归方程获得了储层孔喉与"无伤害"颗粒粒径之间的规律关系,取得了有益的结论,对于油田制定合理的水质控制指标、预测吸水能力变化和制定增注措施具有重要指导意义.     

Optimization principle of combined surface and underground mining and its applications

The pit limit optimization is discussed, which is one of the most important problems in the combined mining method, on the basis of the economic model of ore-blocks. A new principle of the limit optimization is put forward through analyzing the limitations of moving cone method under such conditions. With a view to recovering as much mineral resource as possible and making the maximum profit from the whole deposit, the new principle is to maximize the sum of gain from both open-pit and underground mining. The mathematical models along the horizontal and vertical directions and modules for software package (DM&MCAD) have been developed and tested in Tonglushan Copper Mine. It has been proved to be rather effective in the mining practice.     

数据库权限管理的一种新模式

本文从数据库管理及安全两方面介绍了一种新的基于角色的数据库权限管理模式,以Oracle数据库管理系统为例,对角色的预定义、使用、管理模式的控制方式等进行了叙述。这种新模式将更好地适应企业特定的安全策略和组织结构的调整。     

Radial explosion strain and its fracture effect from confined explosion with charge of cyclonite

Instrumented experiments were conducted in concrete models to study the explosion-induced radial strain and fracture effect of rock-like media under confined explosion with a charge of cyclonite. As a charge was exploded,two different radial strain waves were sequentially recorded by a strain gage at a distance of 80 mm from the center of charge. Through the attenuation formula of the maximum compressive strain(εrmax), the distribution of εrmax and its strain rate(ε) between the charge and gage were obtained. The effect of the two waves propagating outwards on the radial fracture of surrounding media was discussed. The results show that the two waves are pertinent to the loading of shock energy (Es) and bubble energy (Eb) against concrete surrounding charge, respectively. The former wave lasts for much shorter time than the latter. The peak values of εrmax and ε of the former are higher than those of the latter, respectively.     

一种新型的平垫密封结构

大庆石化公司化肥厂于2005年进行的扩建改造工程中,增加了一套分子筛干燥器装置,用于氨合成回路补充气或深冷分离系统原料气的深度脱水.一般配置为:吸附器2台,交替吸附和再生；再生器加热器1台,为分子筛再生提供热源.其中新增的一台再生气加热器(183C)使用了一种新型的平垫密封结构,这种密封结构大胆的在普通平垫密封结构的基础上加以改进,不仅提高了其安全可靠性,而且扩大了平垫密封结构的使用范围,该设备使用状况良好,适用于类似工况条件的使用,值得推广.     

分级尾砂充填系统振动给料技术试验研究

本文介绍了武山铜矿分级尾砂充填尾砂振动给科系统的技术原理、破拱装置与砂仓结构之间的关系、振动给料机性能及其试验。试验结果证明,采用尾砂振动给料后,尾砂给料均匀连续,易于控制,尾砂充填料浆浓度高于71%,解决了矿山原分级尾砂充填工艺中因为水量和尾砂量无法控制,导致充填料浆重量浓度和充填效率低、采场充填接顶困难和充填料严重离析等一系列问题。