立井刚性罐道井筒装备的安装

矿山立井刚性井筒装备安装技术复杂、施工难度较大，结合实践介绍了从上至下一次安装罐道梁、罐道、梯子间的工艺及吊盘设计方法。     

立井井筒装备下行一次竣工施工方法的实验与研究

立井井筒装备下行一次竣工施工方法的实验与研究七台河矿务局工程处李全立井井筒装备安装，传统的施工方法，大多为自下而上，多层吊盘作业，逐层一次竣工。少量分次安装，先自上而下安装罐梁、梯子间，再自下而上安装罐道及管路等，此两种施工方法，根据我们多年的施工经...     

浅谈立井井筒装备一次成型法施工

0 前言 立井井筒装备的安装,是立井施工中一项非常重要的工作,安装质量的好坏直接影响着井筒装备使用的可靠性.主要包括罐梁、罐道、梯子间、管路及电缆安装和敷设.井筒设备的安装就其工作的劳动量来说,一般不超过全部井筒施工的10%;可是安装准备期较长,安装工期也约占成井总工期的15%～20%左右.     

主井井筒装备的设计与选型

以锡矿山闪星锑业公司南矿盲主井井筒装备为例,对井筒装备的罐道及罐道梁进行具体设计及计算,并进行选材,校验结果说明罐道梁选用矩形钢D-2 140×90×6,罐道选用160×160×6方钢能满足强度和刚度的要求,罐道梁层间距采用4.0 m是可行的。此外,还确定了罐道与罐道、罐道与罐道梁的连接方式、罐道梁固定方式及井筒装备的防腐施工工艺,使井筒装备的设计及施工更加科学合理。     

冠山立井井筒安装

冠山副井掘砌至终深1025.5米并进行壁后注浆封水后,于1980年3月开始进行井筒装备的安装。施工中,采用五层吊盘自下而上一次安装罐道梁、罐道和管路,并采用了树脂锚杆固定托架、焊接罐道梁、模具盘钻锚杆孔、焊接管路以及激光水准仪测定水平等新技术,加快了井筒安装速度。     

东庞矿副井延伸井筒装备安装

延伸段不停产安装井筒装备 ,延伸段上方设置保护盘 ,利用原设施 ,分 3阶段安装 ,改造框架安装伸缩罐道。     

基于工程参照法的立井井筒装备设计探讨

针对当前立井井筒装备中大罐道受力实测数据少,计算方法不尽相同,计算结果相差较大,设计随意性较大的问题,结合红庆梁副立井井筒装备设计情况,通过介绍几例已运行的立井井筒大罐道工程实例,提出了运用工程参照法设计立井大罐道的思路,为立井井筒装备,尤其是大罐道设计提供了一些有益的参考。     

立井井筒十字线移设整体稳线测量技术应用分析

越南下龙煤矿主井井筒掘砌到底后,井筒与巷道4个连接处和装载硐室施工时,以及井筒罐道梁、管道等装备安装时,需要将井筒十字中线向下移设。通过十字中线移设整体稳线测量技术的应用,在井下恶劣环境中,实现了井筒十字中线的高精度快速移设,取得了较好的技术经济效果。     

立井木罐道磨损治理

上世纪50-60年代矿山建设的立井大部分使用木罐道。由于测量、施工等原因，安装的木罐道总是与罐道中心线之间存在着一定的误差，加上钢丝绳在提升过程中所有的旋转力都集中在天轮与罐笼之间的钢丝绳上，并通过连接装置传给罐笼，加剧了罐耳与罐道梁之间的磨损。由于安装存在的误差，罐笼突出部位就更加大了磨损；老井筒由于罐道与井筒之间产生了相对的位移，使罐道偏离了罐道中心，也造     

立井钢丝绳罐道的使用与维护

１ 概述 煤矿提升系统的正常运转，是保证生产顺利进行的至关重要的环节，而保持井筒装备的良好状态，对保证提升系统的正常运转起着不容忽视的作用。 目前井筒装备有木罐道、各类钢罐道、焊接组合罐道和钢丝绳罐道等类型。钢丝绳罐道最大优点为投资少、施工安装工期短，且更换方便、维护简单，经济效益好，已被广泛应用而取代木罐道和钢罐道。但钢丝绳罐道存在着张紧、稳罐、安全间隙及防腐蚀等一系列问题，都制约提升系统的正常运行。在此，将钢丝绳罐道的常见问题与产生的原因及钢丝绳罐道的使用与维护经验介绍如下。 ２ 钢丝绳罐道常见…     

采煤机多信息故障诊断系统平台设计

采煤机是煤矿高效生产的关键设备,对其进行故障诊断及预测具有重要的意义,目前国内外的相关诊断技术都有各自的局限性。针对采煤机检测信号数据繁杂、难以处理的问题,建立了基于特征值和BP神经网络相结合的的故障诊断模型,利用Lab VIEW和MATLAB混合编程技术开发了采煤机多信息故障诊断软件,即通过对振动、电流、温度信号进行谱分析,建立特征值历史曲线,利用BP神经网络对故障进行分类。通过对齿轮箱故障信号的分析,证明了该软件不仅可靠性高,而且界面友好、计算精度高以及功能易扩展等优点。     

微震监测评价卸压爆破效果的方法

采用时-频分析技术,研究了徐州三河尖煤矿9202冲击矿压高危险工作面开采过程中卸压爆破微震信号的频谱特性,通过对微震信号的谱特性分析,进行卸压爆破效果的评价,从而为冲击矿压灾害动态防治效果的有效检验提供一条新方法。     

西出阳关遇故人 投身玉门学钻井

小时候父辈就教导 :国家科学技术不强 ,只能遭受外国欺凌。为了报效祖国 ,大学里先学航空想造飞机打日本 ,其实哪有那么简单。学了 2年多 ,没有经济来源 ,无奈只有放弃“上天”梦想 ,改为“入地” ,学了采矿工程。抗日战争期间 ,全国只有一个油矿 ,于是和 8位同学商议好 ,毕业以后 ,“西出阳关”去玉门。到了那里我们大吃一惊 ,所有的设备机器全是进口的 ,还有一批留学回国人员 ,唯一奇缺的是年青的学子。于是我们分到了钻井、采油、机械、炼油等部门 ,勤奋地学习了不少新知识。     

A Review of Emerging Technologies for Sustainable use of Coal for Power Generation

Concerns about climate change and environmental consequences of increased levels of atmospheric CO 2 will require the power generation industry to reduce CO 2 emissions from current levels. Unfortunately, for reductions to have the desired effect they will have to be large. While the schedule of the Kyoto Protocol may appear daunting, in the long term mere compliance with the protocol will hardly change the rate of increase of atmospheric CO 2. There are, however, technical, economical and practical choices that will allow the industry to meet the requirements of protocol and ultimately stop the increase in atmospheric CO 2 without eliminating coal from the fuel mix. In this paper, we present a review of current and emerging technologies for CO 2 sequestration. We provide a summary of the underlying scientific principles and discuss the practical and economic aspects of sequestration technologies, which will allow continuing use of global coal resources with minimum or no impact on CO 2 levels in the atmosphere.     

减振器速度试验台曲柄连杆机构的动平衡分析

介绍了减振器速度试验台的结构与原理,对其中的曲柄-连杆机构进行了动平衡分析,通过计算和分析比较,确定了平衡块的质量和位置,消除了系统整体惯性力,为确保该试验台的性能提供了保障。     

Design of a dust tower for suppression of airborne particulates for iron making

Proper characterization of a dust suppressant represents a significant challenge. There has been confusion on what makes an effective dust suppressant. Many have argued that a dust suppressant must wet the material effectively and rapidly to control airborne dust. As a result, dust suppression studies have been heavily dependent upon laboratory wetting experiments such as contact angles, fine particle engulfment rates, and particle bed experiments to characterize dust suppressants. It has been believed that an effective dust suppressant should produce a low contact angle, and engulf particles rapidly thereby wetting the surface effectively and reducing airborne dust levels. However, these methods only characterize how the suppressant wets a given material, which does not directly correlate to the ability to suppress dust. Furthermore, a clear correlation between wetting enhancement and dust suppression has not been demonstrated. In order to address this gap, a novel dust tower was constructed which provided direct material dustiness measurements and allowed for a more realistic evaluation of dust suppressant effectiveness. This unit was able to clearly distinguish differences in dustiness that resulted from treatment of iron ore pellets with several different dust suppressant chemicals.     

Amenability for processing of oolitic iron ore concentrate for phosphorus removal

Beneficiation routes aimed at dephosphorisation of oolitic gravity magnetic concentrate and involving a combination of roasting, re-grinding, magnetic separation and water and acid leaching are investigated. Roasting was carried out at 900 °C for 1 h without or with lime or sodium hydroxide as roasting additives. When additives were used, cement phases of Si–Al–Na–Ca–O type were detected as well as the mineral giuseppettite. During the thermal process sodium silicate is liquefied and the newly formed phases coat the oolites and penetrate inside the cracks. Energy Dispersive Spectroscopy analysis has indicated that the zone surrounding the oolites consists of Na, Al and Si phases with part of phosphorus being captured there. As a result of the alkaline roasting, goethite is partly transformed to magnetite and this reduction is reinforced with an increase in sodium hydroxide dosage. Investigation of redistribution of phosphorous shows that it could be only partly separated if leaching is not accompanied by re-grinding and physical separation. The recommended dosage of the reductive agent for the final flowsheet is 8 mass% ratio to concentrate. Grinding to a mean size of 0.040 mm, with water and acid leaching and double magnetic separation creates conditions to obtain a high-quality iron concentrate with 65.97% Fe and recovery of 92.43%, with simultaneous decrease in the phosphorus content from 0.71% to 0.05%.     

深化改革求发展加强管理创效益

两年来，在开拓地质市场方面取得了新的成绩，主要就５个方面的经验作了介绍。     

无烟煤气化型煤热强度测定方法的研究

对无烟煤气化型煤热强度的测试条件和方法进行了较为系统的,考察了加载速度、恒温温度、恒温时间、测试气氛、测定顺序等对测试结果的影响,提出了关于无烟煤气化型煤热强度的测试条件、方法及仪器设备,即恒温温度９００℃、恒温时间４５ｍｉｎ、埋沙、加载速度１０～１５ｍｍ／ｍｉｎ、马弗炉外测法,取６个煤球的平均值即为无烟气化型煤的热强度的测量值。