浅谈企业安全、秩序与革新的关系

秩序是安全的基础,安全是秩序的保证.一个安全的系统,必须是稳定的、有秩序的、发展的系统.企业各种秩序的紊乱,是最大的安全隐患.革新应该有计划、有安排、循序渐进的进行,尤其要注意以适当的速度进行.     

腌菜

盛夏的菜园是丰富多彩的.梳着绿辫子的豆角,火红耀眼的辣椒,算是这个季节菜园里的一道风景了.这个时节也是母亲腌莱的时节.当母亲搬出坛坛罐罐的时候,制作腌菜的序幕也就拉开了.     

中国矿产资源现状与思考

随着经济的快速发展,对于矿产资源的需求与日俱增,对矿产行业的发展提出了更高的要求,然而矿产资源的不可再生使得现阶段的矿产资源形势更不容乐观。本文从资源现状、行业现状、政策现状等方面,对我国的矿产资源进行了调查,从而明确我国矿产行业的发展方向,为进一步研究矿产资源的相关问题奠定基础。     

午夜 过客 人生

寂寞甚至厌恶的情绪充斥着整个灵魂,狠狠地捶了一下桌子,嘭!居然连随意发泄制造出来的声音也在这漆黑的午夜显得格外沉闷,真扫兴!呆呆地看着电脑屏幕上一闪一闪的提示符,连手指都无力抬起。看了看墙上的时钟,凌晨两点四十八分。电脑里放的是许美娴的《内疚》,歌中的伤感,害得我接二连三地抽了十来张的纸巾。想到曾经的我、现在的我,眼泪不知不觉已滑落到嘴角……     

采空区塌陷的离散元模拟

采矿区的稳定以及因塌陷而产生的地质灾害是人们目前急需解决的问题.采用离散元法对含不连续面岩体的采矿区进行了模拟计算,并以此来评价采空区的稳定,以及可能因塌陷而导致的地面影响范围,模拟计算结果与实际情况吻合较好,误差11.7%,这为以后进行类似的分析和评价提供了一种新的方法.     

山恋

巍峨的长白山,沃野千里。沿山脉西行有一座七顶山,山下坐落着一个村庄,风景秀丽。在北方姗姗来迟的春天里,满山的冰凌花顶着尚未消融的冰雪绽放,翠绿的山川透着芬芳,沁人心     

维权——工会工作永恒的主题

珠海的九月,阳光依旧如夏日般的火热、灿烂,整洁的街道两侧那充满南国风光的树木、花草伸出它们的臂膀欢迎着来自祖国四面八方的《当代矿工》杂志的朋友们,甚至连矗立在海边的手捧珍珠的那个“渔女”似乎也比以往更加妩媚动人,招引得我们的会议代表纷纷与之合影留念。就是在这秋高气爽的九月,就是在珠海这美丽的城市,《当代矿工》杂志     

一切都在

<正>有好多天,一休和尚独坐参禅,默然不语。师父看出了其中的玄机,微笑着领他走出了寺门。寺外,一片大好的春光。放眼望去,天地间弥漫着清新的气息,还有半绿的草芽、飞翔的小鸟和静静流淌的小河……     

丁香情结

是一首诗的意韵,让我喜欢上你的馨香。默默地萦绕那缕沁人心脾的芳菲,把灵感的心思陶冶。在春天的雨巷里,你亭亭玉立的身姿,在我的心海中激起阵     

矿浆中的难免离子对黄铜矿和方铅矿浮选的影响

通过分析去离子水浸泡矿石后矿浆中的难免离子组成,研究矿浆中发生变化较大的Ca2 ,Mg2 ,Fe2 ,Fe3 ,Cu2 ,Zn2 和AP 等离子对黄铜矿和方铅矿浮选的影响.发现这些金属离子在用乙基硫胺酯做捕收剂的体系中对黄铜矿的浮选基本没有影响,而对方铅矿浮选的影响分成3类,起活化作用的Cu ,起抑制作用的Al3 ,Fe2 ,Zn2 ,和Cu2 以及基本不起作用的Mg2 和Ca2 .对阳离子的抑制机理进行了探讨.     

微地震监测技术在回采工作面矿压显现规律中的应用

工作面回采导致上覆岩层破坏,上覆岩层的破坏与煤矿顶底板突水、冲击地压、煤与瓦斯突出等事故发生密切相关,对回采工作面矿压显现规律的研究是保障煤炭安全开采的关键之一。回采工作面在覆岩破坏过程中,由于应变能的释放,产生相应强度较弱的地震波（微地震波）。微地震监测技术能够实现实时动态三维空间的整体监测。对鲁西煤矿3_上107工作面回采过程中覆岩破坏产生的微地震事件进行了监测,通过对监测到的微地震事件定位计算,证实微地震发展演化与采场覆岩破坏密切相关。鲁西煤矿3_上107工作面矿压显现规律的微地震监测分析表明,顶板来压时微地震事件数达到高峰,顶板的来压完成时微地震事件数下降,据此得出3_上107工作面基本顶来压步距为23.3 m。与通过现场实测得出的基本顶来压步距24.3 m基本吻合,说明采用微地震监测技术研究回采工作面显现规律是可行的,从而为回采工作面矿压显现规律的研究提供了一种新的技术途径。     

新型带式输送机转弯装置在煤矿生产中的应用

带式输送机转弯装置可以减少运输系统转载环节,减少设备和人员的投入。郑煤集团教学二矿设计并使用了一种新型带式输送机转弯装置,装置主要由转向滚筒、改向滚筒、机架、接料装置等组成,具有0~180°任意转弯、运行阻力大幅度下降、结构模块化设计及安装简单、调试方便、维护简便等特点,该设备在郑煤集团教学二矿中取得了良好的应用效果,解决了以往使用的拐弯胶带存在的问题,实现了设备的安全经济运转,具有较好的推广应用价值。     

地下空洞塌陷影响因子的灵敏度分析

地下空洞塌陷是引起路面变形破坏的主要原因。为了研究地下空洞塌陷影响因子的灵敏度,通过有限元软件ABAQUS建立数值模型,基于数值模拟的结果,采用灰色关联法计算各影响因子对地下空洞塌陷引起路面沉降位移的影响灵敏度,影响因子取土体内聚力、土体内摩擦角、土体弹性模量、地表荷载、地下空洞覆跨比、地下空洞跨径和地下空洞高度。得出各因子对地下空洞塌陷引起路面沉降位移的影响灵敏度依次为:地下空洞覆跨比>土体内摩擦角>地表荷载>土体内聚力>土体弹性模量>地下空洞高度>地下空洞跨径。     

整体式多路换向阀阀芯结构研究

阀芯上阀肩与阀体之间的配合,阀芯上节流槽、均压槽的设计等直接影响整个阀的使用性能和阀的使用寿命。研究对象为矿用装岩机机械液压系统整体式多路换向阀中回转联滑阀阀芯的结构。剖解整体式多路换向阀阀芯的结构,对阀芯节流口的面积进行数学分析,并利用减小阀芯所受径向力的方法对阀芯结构、节流槽、均压槽进行研究。重点研究阀杆上的节流槽、均压槽等阀杆的微小结构对阀使用性能的影响。研究对阀杆的设计具有重要的参考价值。     

中水系统加酸位置研究

电厂中水系统处理采用石灰、混凝澄清、过滤、加酸的处理方式，设置机械加酸澄清池、双室过滤器和软水池，加酸点位置2个，双室过滤器出口混合器处加酸和澄清池出口混合器处加酸，但由于浓硫酸稀释后较强的腐蚀性，加酸管道经常出现泄漏，直接影响中水系统安全稳定运行。通过经验总结与实践，将中水加酸点由原来的澄清池出口混合器更改至澄清池顶部出口集水槽汇流口处，加酸管悬于水平面上方。这样可以使加酸管不再浸入水内加酸而是在水面以上加酸，有效避免了加酸点的腐蚀和泄漏；集水槽汇流口处有1 m高的落差，在水流下降过程中会伴随着向上排气和旋转，水速比较高，水流混合相对均匀，浓硫酸在此处加入后可以立即发生稀释反应，可以将澄清池出水的pH值迅速调整至8左右，正常运行的情况下，不会造成设备的腐蚀；集水槽汇流口位于澄清池顶部清水区，即使在操作不当的情况下集水槽汇流口外壁腐蚀也不会造成中水系统必须立即停运等问题的出现，将加酸点变更至此处，大大提高了中水系统的安全性；中水系统加酸设备和管道运行情况可以直接观察、分析判断，有利于运行与检修人员及时发现和处理隐患；系统变动比较小，易于实现，不影响原有在线仪表的测量使用。     

废催化剂中钼、钒回收工艺的研究

比较了加碱焙烧浸出和焙烧碱浸方法。选择焙烧碱浸工艺进行试验,使用碳酸钠为浸出剂,考察了焙烧温度、焙烧时间及碳酸钠浓度等条件对钼、钒浸出率的影响。确定焙烧温度为650℃,焙烧3 h,碳酸钠加入量为50 g/L的一次逆流浸出工艺,在该工艺下钼的浸出率达91%,钒的浸出率达77.17%。考察沉降温度及氯化铵浓度对钒的沉降率的影响,确定温度在80～90℃,氯化铵浓度为90 g/L时,钒的沉降率达到97%。     

Modeling of Wave Propagation in Block Media

Propagation of strain waves is experimentally investigated under impact loading of a rod system composed of steel cylinders separated by pliable interlayers. The existence of pendulum-type waves is confirmed. In order that wave process in the rod system is numerically described, a viscoelastic model of deforming materials of interlayers used in the experiment is constructed. It is shown that the velocity of waves and the degree of their attenuation are to a great extent dependent on viscous properties of the material of interlyers.__________Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 6, pp. 49–57, November–December, 2004.     

Determination of a potential set of factors which influence the situation of methane emission into roadways being driven

The currently applied methodology of absolute gassiness forecasting in roadways being driven in Polish hard coal mines is based on the results of investigations from before more than twenty years. At present the roadways are being driven in majority of cases in quite different conditions than those which had been the subject of the said investigations. The application of “old” methods of forecasting of methane emission during driving of roadways often brings about great discrepancies between the results of the forecasts and actual situation. It is firstly necessary to determine a potential set of factors which exert an influence on situation regarding methane emission into roadways being driven in order to prepare a verified mathematical model of absolute gassiness forecasting. On the basis of available literature and the investigations conducted by the Central Mining Institute an initial list of factors has been prepared which can have an impact upon methane emission into roadways being driven. The assumptions of heuristic method have been taken advantage of for selection of parameters and indices describing the phenomenon of methane emission. It has been dictated by the fact that the available literature is lacking a pretty unambiguous viewpoint on the subject under consideration and at the same time it is necessary to perform an a priori assessment of the information contained in a given feature (factor). A prepared initial set has been scrutinized to be verified on the basis of a conducted expert survey among seventy specialists in this field. After collecting of the results of the survey their statistical elaboration was prepared. The co-efficient of agreement of multiple ordering, the so called concordance co-efficient has been taken advantage of in order to check the competency of experts. The investigations prove that the experts are in agreement in their opinions. The estimation of a collective assessment of all participants of the survey was conducted with the use of the rank sum’s test by J. Greń. The results of the conducted analysis allowed determining a potential set of factors which influence the situation of methane emission into roadways being driven. This set, after conductance of further detailed investigations, can constitute a base for elaboration of a function describing methane emission into roadways being driven in hard coal mines.     

基于极限分析的三维边坡可靠度研究

基于极限分析上限法提出了非相关联流动法则速度场下三维边坡的安全系数计算方法与可靠度计算模型,该方法有效地避免了在求解相关联法则速度场时,由于摩擦角过大会出现的速度场不收敛问题。基于双对数螺旋线破坏机制,考虑土体参数的空间变异性,提出的可靠度计算方法,相对于二维计算模型能够更加精确地计算边坡的失效概率。最后结合算例讨论了土体参数变异系数对三维边坡可靠度的影响。结果表明,边坡的失效概率随着土体参数c、φ值变异系数的增加而增大,其中c值变异系数对失效概率影响显著,φ值变异系数对失效概率影响相对较小。     

Selective flotation of chalcopyrite and molybdenite with plasma pre-treatment

For pretreatment of selective flotation, plasma treatment of chalcopyrite and molybdenite was applied then the minerals were washed by solution at pH 9 with oxygen bubbling. Surface characteristics of these minerals were investigated with AFM, XPS, zeta potential and contact angle measurements. Contact angle of chalcopyrite and molybdenite decreased a lot by plasma treatment. When they were washed with pH 9 solution with oxygen bubbling, contact angle of molybdenite increased whereas chalcopyrite one kept low. Adhesion force measurements indicated similar behavior. Result of flotation experiments indicated low recovery of both chalcopyrite and molybdenite after plasma treatment and only molybdenite recovery became higher after washing. Selective flotation of chalcopyrite and molybdenite could be achieved with this process. However, flotation of mixture of chalcopyrite and molybdenite after these treatments indicated both chalcopyrite and molybdenite were depressed. Addition of emulsified kerosene changed the flotation results where molybdenite was floated and chalcopyrite was depressed. Possible mechanism of selective flotation was proposed from the results of XPS, AFM, etc.