共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
论当前地下金属资源开发的科学技术前沿 总被引:8,自引:0,他引:8
随着岩石力学的发展、计算机在矿业领域的广泛应用以及多学科交叉的促进,一向作为"技艺"的采矿学已开始进入科学领域。文章对地下金属资源开发的数控采矿环境、实现无废开采、海洋采矿、应对深井开采的岩爆威胁等科技前沿做了初步探讨,阐明其对采矿学科发展的重要意义。 相似文献
3.
传统的螺旋滚筒式钴结壳采矿头在实际开采过程中会使较多的废石混入。为了能在复杂多变的海底矿区实现对钴结壳的精确剥离以及提高开采率,有必要设计一种可高效开采的采矿头。首先,针对海底钴结壳分布的地貌特征,提出了采矿头设计的基本要求并设计了一种悬立式采矿头,同时建立了其参数化设计的数学模型。然后,基于所设计的悬立式采矿头,以降低钴结壳破碎过程中的比能耗为目标,以采矿头截齿不发生干涉、合理布置截距、钴结壳产能达标及最大功率限制等为约束条件,建立了悬立式采矿头结构参数和工作参数的优化模型,并采用遗传算法进行求解。最后,为了验证优化模型的合理性,利用ABAQUS软件模拟了悬立式采矿头破碎钴结壳的过程,得到了优化前后采矿头破碎钴结壳的比能耗,并基于载荷波动特性对采矿头的稳定性进行了对比评价。理论计算结果表明,优化后悬立式采矿头破碎钴结壳的比能耗较优化前约降低了44%。仿真模拟结果表明,优化后悬立式采矿头破碎钴结壳的比能耗和所受载荷的波动系数较优化前分别降低了18%和31.3%,验证了优化模型的有效性。所设计的悬立式采矿头不仅在能耗、载荷波动方面有显著的改善效果,且能更好地适应海底钴结壳的分布特征,这可为深海钴结壳商业化开采的实现提供重要依据。 相似文献
4.
5.
6.
文章从南非矿山安全及其标准化实际情况入手,概述了南非矿山安全标准的制定和监管机构,分析了南非矿山安全法律法规体系、南非矿山安全标准体系等内容,以及南非矿山安全健康标准对我国矿山安全生产的启示。提出加强我国矿山安全生产标准制修订工作的4点建议。 相似文献
7.
金川镍矿是我国最大的硫化铜镍矿,以地应力高、矿体厚大和矿岩不稳固著称国内外采矿界。该矿体开采难度之大、充填成本之高备受国内外采矿界关注。近年来,随着矿床开采深度逐年增加已接近千米,采场面积超过1×105m2,高温、高压和高渗压的"三高"采矿环境日趋显著,不仅提高了采矿成本,而且还给矿山安全高效生产带来巨大压力。本文首先概述金川深部矿床采矿技术条件,然后明确采矿生产面临巷道和采场稳定性控制技术难题,分析采场围岩变形和岩层移动所潜在的灾变失稳风险。最后提出了金川深部矿体安全高效开采亟待攻克的技术难题,为金川深部资源开发能力和综合利用指明了方向。 相似文献
8.
9.
Frequent pattern mining is the most important phase of association rule mining process because of its time and space complexity. Several methods have attempted to improve the performance of association rule mining by enhancing frequent pattern mining efficiency. Due to the large size of the data-sets and huge amounts of data which should be mined, many parallel and distributed mining approaches have been introduced to divide data-sets or to distribute mining processes between multiple processors or computers and thus, improve the efficiency of the mining process. In this paper, we propose a hadoop-based parallel implementation of PrePost+ algorithm for frequent itemset mining. In our parallel approach, the process of constructing N-Lists of itemsets has been distributed between the mappers and the operation of the final pruning process and extracting frequent itemsets has been carried out by reducers in a map-reduce parallel programming model. The experimental results show that our hadoop-based PrePost+(HBPrePost+) algorithm outperforms one of the best existing parallel methods of frequent itemset mining (PARMA) in terms of execution time. 相似文献
10.
挖掘变化知识的可拓数据挖掘研究 总被引:10,自引:0,他引:10
规范了可拓信息与可拓知识基本概念,即在信息和知识的概念上扩充了变化的信息和变化的知识。明确了可拓数据挖掘概念以及可拓推理新概念。证明了可拓数据挖掘两个定理和可拓推理公式。提出的从挖掘静态知识的数据挖掘扩展到挖掘变化知识的可拓数据挖掘,为数据挖掘开辟了新的研究方向,并通过实例进行了说明 相似文献
11.
贵州薄煤层储量在全省煤炭储量中占有很大比重,选择一种合适的采煤工艺很有必要,论文介绍了薄煤层螺旋钻采煤工艺方式,结合贵州省地质条件指出了它的地质适应性和应用优缺点,对开采薄煤层时选择合适的采煤工艺方式有一定的指导意义。 相似文献
12.
The development of industry of uranium mining and metallurgy in China has been reviewed generally, emphasizing on investigation approaches and application levels of uranium mining technologies such as insitu leaching, heap leaching, stope leaching: on the basis of analysis on status of uranium mining and metallurgy and problems existed, also considering the specific features of deposit resources, the development orientation of uranium mining and metallurgy in China is pointed out. The industry of China uranium mining and metallurgy is faced to new opportunity of development and challenge in 21st century, the only way to realize sustainable development of uranium mining and metallurgy and harmonious development between economy and environment is to develop new technology on mining, ore beneficiation and metallurgy, increase the utilization level of uranium resources, low down impact on environment caused by mining and metallurgy. 相似文献
13.
Text mining methods allow researchers to investigate technical documents (tech mining) and specifically explore patents for valuable information (patent mining. To the review literature and analyze the evolution of patent analysis and patent mining methods, bibliometrics analysis and keyword-based network analysis is applied on 143 papers extracted from the 'Web of science' database. Bibliometrics analysis was applied to determine top players researching in patent mining. Applying cluster analysis on the keyword network shows three main stages of patent analysis evolution. Also, it is discussed how patent mining is evolutionized in terms of information retrieval, pattern recognition and pattern analysis. 相似文献
14.
崩落采矿方法作为常用的金属矿床地下采矿法,依据矿床的实际情况科学的选择合适的崩落采矿方法是提升采矿安全性和效率的关键因素。文中对崩落采矿法进行详细的分类并对各分类采矿进行了适用条件进行对应的分析,为合理选择崩落采矿法提供了理论依据。 相似文献
15.
为了解决采煤机在煤层倾角大于20°的工作面采煤工作时经常出现牵引力不足,制动效果不好,采煤机在停机和开机时溜坡下滑等问题,太重煤机有限公司自主设计、建造了大功率采煤机爬坡试验设施用于大功率大倾角采煤机爬坡试验基地。本文主针对采煤机爬坡试验行走曲线和采煤机制动器失效后的运动分析及试验安全防范方面的问题进行了一些论证和探讨。 相似文献
16.
针对平朔矿区4号煤层条件,采用理论分析方法研究了浅埋深两硬条件下4号煤层顶煤的冒放性及合理采煤方法。以提高顶煤冒放性为目标,采用数值模拟的方法进行了综放工作面参数及设备选型配套研究。实践表明,浅埋深两硬煤层条件下通过加大综放工作面长度与割煤高度,可以实现安全、高效、高回收率开采。 相似文献
17.
我国“城市矿山”开发利用战略研究 总被引:2,自引:0,他引:2
我国人均矿产资源严重不足,重要矿产资源对外依存度越来越高。"城市矿山"可作为再生资源循环利用,这是实现经济可持续发展的新方向。本文概述了"城市矿山"的由来、内涵,分析了2006―2016年我国十大类"城市矿山"资源的回收、利用和发展情况,预测了废旧钢铁、有色金属、电子废物、报废汽车等典型"城市矿山"的开发利用潜力,评估了其开发利用在节约资源、保护环境、碳减排和拉动经济方面的贡献,并提出了我国"城市矿山"开发利用的战略及相关政策建议。 相似文献
18.
Jian Pei Jiawei Han Hongjun Lu Shojiro Nishio Shiwei Tang Dongqing Yang 《IIE Transactions》2007,39(6):593-605
In this study, we propose a simple and novel data structure using hyper-links, H-struct, and a new mining algorithm, H-mine, which takes advantage of this data structure and dynamically adjusts links in the mining process. A distinct feature of this method is that it has a very limited and precisely predictable main memory cost and runs very quickly in memory-based settings. Moreover, it can be scaled up to very large databases using database partitioning. When the data set becomes dense, (conditional) FP-trees can be constructed dynamically as part of the mining process. Our study shows that H-mine has an excellent performance for various kinds of data, outperforms currently available algorithms in different settings, and is highly scalable to mining large databases. This study also proposes a new data mining methodology, space-preserving mining, which may have a major impact on the future development of efficient and scalable data mining methods. 相似文献
19.
20.
现行各种开采地面沉陷预测方法均存在着一个共同的缺陷,均不能在集成以往开采地面沉陷工程实
例的基础上对某一地下采矿工程所引起的地面沉陷进行预测,而只能根据某种物理的或力学的方法对其进行预
测。人类在工程实践中所创造的开采地面沉陷方面的经验是非常宝贵的财富,应当在建立开采地面沉陷预测方
法时加以充分利用。以所收集的开采地面沉陷工程实例为基础现行各种开采地面沉陷预测方法均存在着一个共同的缺陷,均不能在集成以往开采地面沉陷工程实
例的基础上对某一地下采矿工程所引起的地面沉陷进行预测,而只能根据某种物理的或力学的 相似文献