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31.
金川镍矿近年来在原有下向胶结充填采矿法开采的基础上,对开采工艺、充填工艺、机械设备管理、劳动组织、工资制度等方面进行了全面改革,因而使机械化开来比普通(电耙)法开采,取得了令人瞩目的经济效益。目前金川镍矿已经大力扩大机械化开采应用范围。 相似文献
32.
金川镍矿通过8年的试验和生产实践,对斜坡道工程的施工、应用已有丰富的经验,本文对主斜坡道、副斜坡道、分斜坡道的方案、布置方法、断面、坡度、曲率半径、道路铺设、红外信号系统的确定都作了具体介绍。 相似文献
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针对地下矿山斜坡道建模技术不完善且在矿山的应用程度低的问题,基于参数化思想开展了地下矿山斜坡道三维建模方法研究。首先,根据斜坡道断面参数,构建斜坡道断面的二维轮廓线;其次,根据斜坡道路径参数,经系列坐标转换得到斜坡道断面的三维轮廓线;再次,采用连续断面的侧面构建算法快速建立斜坡道三维模型;最后,将斜坡道的模型参数存贮于相应模型的数据结构中,以便于计算其工程数据和检索、查询、动态修正模型参数。借助该方法和HOOPS组件,运用VC++工具,开发了一个地下矿山斜坡道参数化建模系统。基于该系统并根据某矿山地下斜坡道的路径平面图、斜坡道坡度和断面参数信息,成功构建了斜坡道的三维参数化模型,并能根据矿山施工进展动态修正模型。 相似文献
35.
本文围绕红透山矿红透山矿深部-707m水平13#采场斜坡道围岩层裂破坏,通过现场工程地质调查、岩石力学实验、围岩应力分析,对13#采场斜坡道的围岩质量进行分析及岩体力学参数估算;在此基础上,应用FLAC3D分析回采对斜坡道围岩层裂破坏影响,开采矿体围岩在切向应力作用下,岩体微裂纹沿切向应力方向扩展、贯通,形成平行于开挖边界的宏观裂缝;数值分析采动过程斜坡道围岩层裂发生力学机制及其围岩应力场变化规律,数值模拟结果表明,深部斜坡道围岩高应力、采动应力以及爆破震动共同作用造成岩体产生层裂破坏。 相似文献
36.
Chul-Ho Bae Ki-Yong Cho Sung-Ho Ji Bae-Young Kim Myung-won Suh 《Journal of Mechanical Science and Technology》2009,23(5):1374-1382
This research aims to optimize the traffic signal cycle and the green light time per traffic signal cycle at ramps and intersections
in arterials to maximize the passing traffic volume and minimize the delaying traffic volume in freeway corridors. For this
purpose, we developed the MATDYMO (multi-agent for traffic simulation with vehicle dynamics model) and validated it with comparison
to commercial software, TRANSYT-7F, for an interrupted flow model and to URFSIM (urban freeway traffic simulation model) for
an uninterrupted flow model. These comparisons showed that MATDYMO is able to estimate the traffic situation with only incoming
traffic volume. Using MATDYMO, ramp metering and traffic signal control can be optimized simultaneously. We extracted 80 sampling
points from the DOE (Design of Experiment) and derived each response from MATDYMO. Then, a neural network was adopted to approximate
the objective function, and simulated annealing was used as an optimization method. There are three cases of the objective
function: maximization of the freeway traffic volume, minimization of the delay of ramps and arterials, and the satisfaction
of both cases. The optimization results showed that traffic flow in freeway corridors can be maintained to a steady stream
by ramp metering and signal control.
This paper was recommended for publication in revised form by Associate Editor Kyongsu Yi
Myung-Won Suh is a professor of Mechanical Engineering. During 1986–1988, he worked in Ford motor company as researcher. During 1989–1995,
he worked in technical center of KIA motors. He took a BS Degree in Mechanical Engineering from Seoul National University
and an MS Degree in Mechanical Engineering from KAIST, South Korea. He obtained his Doctorate at University of Michigan, USA,
in 1989. His research areas include the structure and system optimization, advanced safety vehicle and reliability analysis
& optimization.
Chul-Ho Bae is a PhD candidate at Sungkyunkwan University in Suwon, South Korea. He accomplished fellowship work as researcher at Mississippi
State University, USA, in 2003 and 2005. He worked in Institute of Advanced Machinery and Technology (IMAT) as a Research
Assistant in 2004. He was a part time Lecturer in computer aided Mechanical Engineering of Ansan College of Technology, Suwon
Science College, and Osan College during 2004–2005. He took a BS Degree in Mechanical Design and an MS Degree in Mechanical
Engineering from the Sungkyunkwan University. His research interests include computer aided engineering, reliability engineering,
and optimization. 相似文献
37.
Point reactor kinetics equations with one group of delayed neutrons are solved analytically to determine the neutron population as a function of time for any ramp reactivity insertion in the presence of external neutron source using prompt jump approximation. With the time dependent neutron population the other important kinetic parameters such as the reactor period also can be derived. Analytical solutions are available in the literatures for any ramp reactivity insertion into a critical reactor without considering the source term. Analytical solutions available in the literature by considering the source term also to study sub-critical reactor kinetics. But such a solutions either uses constant source approximation which under predicts the solution, or the available solution is not useful for all kind of sub-critical reactivity and external ramp reactivity insertion combination due to the computer precision incompatibility. In the present work, analyses are carried out to determine the reactivity boundary to which the existing results can converge to a true solution, beyond where the precision incompatibility arises. A new series solution is recommended in the region where existing solution converges to false solution due to precision incompatibility. 相似文献
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为了使应用计算机编制露天矿开采进度计划时采用的运输距离更符合实际,本文提出了一种卡车移动坑线优化布置的方法。 相似文献