首页 | 官方网站   微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 296 毫秒
1.
对我国矿井支护设备的分析与探讨   总被引:2,自引:0,他引:2  
黄启富  胡中华 《黄金》2003,24(3):31-35
从矿井支护机理及其应用现状出发,对国内外几种常用矿井支护设备进行了分析,进一步探讨了国内矿山支护工艺水平的现状与差距,指出了矿井支护设备的应用、改进和发展的方向。  相似文献   

2.
介绍了马路平矿围岩地质分类、高应力分布规律和岩层基本特征,分析了马路坪矿深部巷道开挖支护存在的问题。总结了马路坪矿深部巷道破坏变形规律,提出了采用喷锚网+注浆支护设计的施工技术方案,评价了以前采用支护方式和现在采用喷锚网+注浆支护的经济效益。目前,这一新的支护方法已逐步推广应用。  相似文献   

3.
黑山铁矿580平硐在掘进过程中遇到破碎带,采用喷射混凝土支护取得了良好效果。介绍了喷射混凝土支护的原理、性能、优点和工艺,并结合在580平硐支护中的应用,系统地说明了参数的选择和施工要点。  相似文献   

4.
黑山铁矿580平硐在掘进过程中遇到破碎带,采用喷射混凝土支护取得了良好效果。介绍了喷射混凝土支护的原理、性能、优点和工艺,并结合在580平硐支护中的应用,系统地说明了参数的选择和施工要点。  相似文献   

5.
金属条带是一种简单而灵活的支护材料,对提高锚喷网支护的结构性能及在采矿巷道中的应用效果,具有极其明显的作用。本文对金属条带的结构、作用原理及应用进行了论述。  相似文献   

6.
采场顶板长锚索预锚固技术的研究与应用   总被引:5,自引:1,他引:4  
王文才 《黄金》2001,22(3):22-24
阐述了采场顶板长锚索预锚固技术的原理、支护参数及施工工艺。应用表明,采场顶板长锚索预锚固技术施工安全,成本低,支护效果好,值得推广应用。  相似文献   

7.
木托锚杆支护在焦家金矿的应用   总被引:2,自引:0,他引:2  
张忠辉  刘福安  杨勇 《黄金》2006,27(5):24-26
针对焦家金矿上盘主断层岩石破碎、节理发育、支护难度大、富矿损失严重的现状,采用木托锚杆支护上盘回收下三角富矿石。经过长期的实际应用,取得了良好的效果。  相似文献   

8.
将岩体破坏接近度指标(FAI)引入隧道支护设计,明确了围岩临界支护时机判别准则。基于有限差分数值计算程序,合理考虑岩体峰后应变软化特性,建立了一种隧道最优支护时机确定方法。通过算例分析,定量探讨了表征支护时机的重要参数,从工程角度阐释了支护时机的本质意义。结果表明:岩体地质强度指标GSI由75减小至25时,支护时机提前8.32 m;岩石材料常数mi由20减小至10时,支护时机提前5.85 m;岩石单轴抗压强度σci由80 MPa减小至40 MPa时,支护时机提前3.74 m;工程扰动参数D由0增加至0.8时,支护时机提前7.44 m。将建立方法在玉渡山隧道工程中进行应用,计算出研究区段的支护时机为3.3 m,经现场监测表明该方法有效、可行。该研究成果可为隧道支护体系的量化设计提供参考。   相似文献   

9.
边坡支护是一种十分有效的防治方法,特别是对矿井地质灾害的处理,采用边坡支护技术,能有效地减小边坡的应力和变形,消除滑坡的危险性,提高矿山的稳定性;边坡支护能够有效地提高边坡的抗滑性能,从而提高其抗震性能,从而达到深层加固目的。试验结果表明,边坡支护措施能改善边坡的稳定性,并能降低其发生的地质灾害。本文对边坡支护,在矿山地质灾害治理中的应用进行了探讨。  相似文献   

10.
在基础施工中,为保证边坡稳定,可以采用板桩支护措施,本从自立式即悬臂式板桩支护结构在不同打入深度时的变形情况入手,对该支护结构的设计及实际应用作了探讨。  相似文献   

11.
程黄根 《烧结球团》2006,31(5):54-58
介绍了马钢一烧3座球团竖炉的电除尘器系统及其运行情况。其中,1^#、2^#竖炉于2001年7月投产,2005年4月扩容为10m^2,并对其电除尘系统进行了改造。3^#竖炉于2004年5月投产,由于汲取了1^#、2^#竖炉的经验,其电除尘系统的设计和设备选型合理,投产顺利,取得了较好的效果。  相似文献   

12.
Developed a model of occupational stress, social support, locus of control, and depression among family physicians. 210 family physicians (average age 48 yrs) were administered measures of occupational stress, social support, locus of control, and depression. The hypothesized model was evaluated using structural equation models (LISREL). Results indicate that occupational stress exerted a direct effect on depression. This relationship was moderated directly by family social and emotional support and indirectly by the influence of locus of control on family social support. Support from peers was not significantly related to depression. Findings suggest that individuals with a strong sense of personal control also possess beneficial support systems in the presence of stressful situations. (58 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

13.
长沙铜铝材有限公司国外引进的倒立式圆盘拉伸机,虽整体使用状况良好,但开卷机构和卷取机构上升、下降系统容易出现故障。经分析研究,发现故障产生的原因是结构不合理,通过重新设计计算,采用滑柱滑套结构替代原轴承和导轨条结构后,原有故障形式被消除,大大提高了设备利用率和产品质量。  相似文献   

14.
Vibration and noise are two major factors in the performance assessment of rail transit systems, particularly in an urban environment where elevated systems are used. A program of field measurements was conducted in Singapore on an elevated section of straight tracks to monitor the rail vibrations and noise generated during the passage of trains. Field measurements included impact hammer tests to determine the driving point impedances of the train wheel and track support system. These tests are relatively easy to perform, requiring only an inverted wheel-set-and-bogie assembly at the workshop and the tracks at the test yard. An analytical train model was developed to predict the level of rolling noise at the wayside of the tracks for comparison with measured levels. The analytical predictions from the model were found to be in good agreement with field measurements. A hybrid approach involving a finite-element model of the track support system and impact hammer test results was also presented to determine the effect of using softer rails pads.  相似文献   

15.
钨钼活化烧结机理   总被引:4,自引:0,他引:4  
马康竹 《中国钼业》1995,19(6):14-19
主要介绍了添加少量Ni-Co时钨,钼的低温烧结特性,对比了纯钨,W-Co,W-Ni,W-Ni-Co,纯钼,Mo-Co,Mo-Ni,Mo-Ni-Co烧结体系,测算了这些体系的烧结活化能,研究了其低温烧结机理,发现Ni-Co对钨,钼的烧结具有最好的活化效果,说明镍与钴的共同加入对钨,钼的烧结具有协同活化作用。  相似文献   

16.
Nonsyphilitic interstitial keratitis and deafness was first described as a distinct entity by Cogan in 1945. For years thereafter, it was believed to involve only the ocular and aural systems. It is gradually becoming apparent that the syndrome can also include other organ systems by affecting their blood supply. A patient with diagnosed Cogan syndrome subsequently developed mesenteric vascular insufficiency that was surgically corrected. This report lends more support to the belief that nonsyphilitic interstitial keratitis with deafness is only one manifestation of a more generalized vascular disease.  相似文献   

17.
Integrated project systems hold the promise for improving the quality while reducing the time and cost of architecture/engineering/construction (AEC) projects. A fundamental requirement of such systems is to support the modeling and management of the design and construction information and to allow the exchange of such information among different project disciplines in an effective and efficient manner. This paper presents a methodology to implement integrated project systems through the use of a model-based approach that involves developing integrated “smart AEC objects.” Smart AEC objects are an evolutionary step that builds upon past research and experience in AEC product modeling, geometric modeling, intelligent CAD systems, and knowledge-based design methods. Smart objects are 3D parametric entities that combine the capability to represent various aspects of project information required to support multidisciplinary views of the objects, and the capability to encapsulate “intelligence” by representing behavioral aspects, design constraints, and life-cycle data management features into the objects. An example implementation of smart objects to support integrated design of falsework systems is presented. The paper also discusses the requirements for extending existing standard data models, specifically the Industry Foundation Classes (IFC), to support the modeling of smart AEC objects.  相似文献   

18.
刘满洲 《中国钼业》1998,22(6):21-23
分析了金堆城钼业公司管理信息系统(JDCMIS)的需求,提出了金堆城钼业公司管理信息系统目标和网络设计实现的技术方案。  相似文献   

19.
李刚 《河北冶金》2011,(12):63-64
开关量服务器在唐钢无人值守系统中起着重要作用,它功能强大,操作简单。开关量服务器支持设备的输入和输出,在与VSPM软件配合使用中能够应用于很多领域,如汽车磅、轨道衡、车间衡。具有明显的实用性、可靠性和先进性,极大地提高了工作效率,降低了生产成本。  相似文献   

20.
Evolutionary Design of Steel Structures in Tall Buildings   总被引:1,自引:0,他引:1  
This paper presents results of a study on evolutionary computation in the design of the steel structural systems of tall buildings. It describes results of extensive research on both short-term (up to a few hundred generations) and long-term evolutionary design processes (at least a few thousand generations). The experiments were conducted with Inventor 2001, an evolutionary design support tool developed at George Mason University, for generating conceptual and detailed designs of steel structural systems in tall buildings. First, the paper discusses conceptual design of steel structural systems in tall buildings and briefly introduces Inventor 2001 as well as its design representation and evolutionary computation characteristics. Next, it provides the results obtained from systematic parametric design experiments conducted with Inventor 2001. The objective of these experiments was to qualitatively and quantitatively investigate evolution of steel structural systems of tall buildings during a multistage evolutionary design process as well as the influence of various evolutionary computation parameters. Mutation and crossover rates, population size, the length of the evolutionary processes, and the importance of a symmetry requirement have been analyzed and results produced. Emergence of structural shaping patterns has been also studied and several interesting patterns found in the evolutionary design process. Finally, research conclusions are presented as well as recommendations for further research and development of evolutionary design support tools.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号