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1.
矿产开采是获取矿产资源的重要方式,在矿山开采中会给周围环境造成破坏,产生较多的废弃物,污染了原有环境,不符合行业绿色发展趋势。绿色矿山开采重视将绿色理念融入到开采活动中,优化开采计划,控制污染和给环境造成的破坏。水文地质勘查类型会给矿山开采带来各种不同的影响,相关人员对此认识度不足,制约了绿色矿山开采活动的有序推进。基于此,本文对水文地质勘查类型进行了划分,提出了水文地质勘查类型对于绿色矿山开采的影响,对水文地质勘查工作存在问题和解决策略进行了研究,以期可以为矿山开采提供有效参考意见。  相似文献   

2.
地下矿山连续开采技术研究进展   总被引:3,自引:0,他引:3  
本文简要介绍了地下矿山连续开采的概念,分析了国内外地下矿山连续开采技术的研究进展,展望了我国地下矿山连续开采技术的发展方向.  相似文献   

3.
有些开采多年的老矿山,矿床开采完了,矿床外围又发现新矿床,新矿床的开采又借用老矿床的井口,提升,排水等设施,但老矿床几十年开采形成的采掘空间,往往涌水量较大,增加了新矿床的开采成本,如何兴利除弊,对老矿床封水?沂南金矿做了大胆实践,效果很好。  相似文献   

4.
金川二矿区是我国年产矿石突破400万t/a的大型镍矿产资源生产基地,其开采工程已经进入到850中段,开采深度超过千米,随着开采深度加深,探讨深部高效、安全开采是金川矿区乃至金属矿山亟待解决的重要课题。本文结合二矿区目前开采现状,探讨分析了978m分段首采分层回采面临的技术问题,并提出了解决措施,对矿山深部资源回采具有一定借鉴作用。  相似文献   

5.
我国地下锰矿山开采现状,问题及建议   总被引:1,自引:1,他引:0  
郭金峰 《中国锰业》1997,15(4):23-25
介绍了我国地下锰矿床地质特征、开采技术条件及矿山开采的基本特点,简单归纳了当前国内锰矿山开采存在的主要问题,并提出了相应的建议。  相似文献   

6.
鑫汇黄金矿业公司无废开采技术   总被引:6,自引:1,他引:5  
黄志伟  古德生 《黄金》2002,23(11):16-18
无废开采是一个全新的概念,是21世纪所普遍关注的议题,文中首先简述了无废开采的定义和实行无废开采的意义,然后根据公司的现状论述了其实行无废开采的必要性和可行性,随后通过对其尾砂充填采矿研究,选矿浸渣处理与铅锌提取工艺试验,以及矿山采掘废石资源化措施等方面的介绍,叙述了该公司实施无废开采主要的措施与方法,最后对其无废开采的效果作了客观的评价。  相似文献   

7.
宋前  古德生 《有色矿冶》1997,13(5):9-12
连续开采是金属矿床地下开采的发展方向,大块管理是连续开采的一个关键内容。本文分析了矿石大块对连续开采的不利影响,提出了连续开采过程中的大块管理措施。  相似文献   

8.
为提高矿山初期经济效益,增强还贷能力,通过对某铜金矿储量,品位等变化规律研究,对其开采顺序方案进行了较为详细的技术经济评价,提出从矿体中间某一水平首采,先由下而上开采上部矿体,后由上而下开采下部矿体与常规开采顺序截然不同的开采顺序,且技术可行,安全可靠,经济合理。  相似文献   

9.
矿产资源作为国家发展的重要资源之一,虽然在新能源发展的现在,战略价值有所下降,但仍然是不可缺少的能源之一。因此矿产的开采是非常重要的,对于矿山企业来说,矿产开采效率是企业发展的重要因素之一。现阶段在矿产开采的过程中,对于开采的技术和安全都有了更高的要求,开采的标准也越来越严格,钻探进尺技术是矿产开采重要的技术之一,本文就从影响钻探进尺效率因素的角度出发,对提高矿井钻探进尺效率方法进行简单的探讨。  相似文献   

10.
根据矿业有限开采方案优选决策过程中评价指标多、采用单层次评判模型难以准确反映出多项指标的影响程度及范围的特点,利用层次分析法构建矿业有限开采方案多评价指标层次结构体系,并应用灰色关联度和拓展的最小二乘准则建立基于"优"、"劣"模式的加权灰色关联度评判模型优选有限可行开采方案,采用本文中提出的优选决策方法,对某黄金矿山开采方案优选进行了实例分析计算,选出了适合于该矿体开采的试验开采方案。  相似文献   

11.
Two important elements in problem solving are the abilities to encode relevant task features and to combine multiple actions to achieve the goal. The authors investigated these 2 elements in a task in which gorillas (Gorilla gorilla) and orangutans (Pongo pygmaeus) had to use a tool to retrieve an out-of-reach reward. Subjects were able to select tools of an appropriate length to reach the reward even when the position of the reward and tools were not simultaneously visible. When presented with tools that were too short to retrieve the reward, subjects were more likely to refuse to use them than when tools were the appropriate length. Subjects were proficient at using tools in sequence to retrieve the reward. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

12.
Prior to construction of a bridge or highway, the National Environmental Protection Act (NEPA) requires an evaluation of the effect of the project on the human environment. The purpose of NEPA is to require the head of the federal agency that is committing funds to the project to consider its actions before deciding to proceed with the project. This paper will analyze the general provisions of NEPA to remove some of the mystery related to the environmental concerns raised by bridge or highway projects and to emphasize to transportation planners that these concerns must be addressed prior to beginning a major bridge or highway project. The intent of this paper is to provide some guidance to transportation planners in light of these statutes as they begin the planning stages for highway and bridge projects.  相似文献   

13.
江西铜业集团公司贵溪冶炼厂(简称贵冶)固定式精炼炉,因其在设计上存在缺陷及生产工艺的改变,不能满足生产的需要。在生产实践中积累经验后,将其进行技术改造。将改造前后的不同状况列出进行比较,从而阐述改造后取得的效果,最后列举出贵冶固定式精炼炉目前还存在的不合理因素,并设计出解决的方案,做到工作持续推进。  相似文献   

14.
Reviews the book, Repairing your marriage after his affair: A woman's guide to hope and healing by Marcella Bakur Weiner and Armand DiMele (1998). This book addresses the difficult task of reestablishing trust in the marriage after an affair and offers specific guidelines for discussions that aid the healing process. The authors recommend exercises that help the couple break down the barriers to intimacy and cultivate greater happiness in the marriage. They also include a chapter for handling children during this critical period and suggest ways to minimize the trauma to them. Their advice is sound and their suggestions for recovery quite practical and valuable to any woman struggling to come to terms with her partner's affair. The authors provide some helpful information to the woman contending with this problem and hoping to continue in the marriage. It is likely to appeal most to the woman reluctant to enter individual or couple therapy with her husband, yet needing some help in coping with the intense emotions at this confusing time; it can help her in deciding whether to leave or stay in the marriage. The book can also be used as an adjunct to therapy for women already in treatment who might want supplemental reading. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

15.
Nonlinear dynamic analysis with fiber-element models is now widely used to assess the seismic response of bridge structures. The ability of such models to accurately simulate response parameters for characterizing the postearthquake condition of bridges, namely residual displacements, is assessed by comparison of analyses of dynamically loaded reinforced concrete bridge columns to experimental data. The models are unable to capture residual displacements, and the cause of the inability to capture residual displacements is investigated through dynamic analysis of fiber-element and single-degree-of-freedom (SDOF) models. A certain type of pinching present in the numerical hysteretic response shape is found to lead to poor residual displacement simulation both in the SDOF models and in fiber-element models. When eliminating this pinching, improvements to residual displacement simulation are found. A modified concrete constitutive model representing damage accumulation from cyclic loading is implemented for the fiber-element analysis that incorporates changes to reloading behavior when moving from high tensile strain back to compression. Analysis using the modified concrete constitutive model leads to improvements in the ability of the fiber-element model to capture residual displacements.  相似文献   

16.
This paper introduces a software, Stochastic Project Scheduling Simulation (SPSS), developed to measure the probability to complete a project in a certain time specified by the user. To deliver a project by a completion date committed to in a contract, a number of activities need to be carried out. The time that an entire project takes to complete and the activities that determine total project duration are always questionable because of the randomness and stochastic nature of the activities’ durations. Predicting a project completion probability is valuable, particularly at the time of bidding. The SPSS finds the longest path in a network and runs the network a number of times specified by the user and calculates the stochastic probability to complete the project in the specified time. The SPSS can be used by a contractor: (1) to predict the probability to deliver the project in a given time frame and (2) to assess its capabilities to meet the contractual requirement before bidding. The SPSS can also be used by a construction owner to quantify and analyze the risks involved in the schedule. The benefits of the tool to researchers are: (1) to solve program evaluation and review technique problems; (2) to complement Monte Carlo simulation by applying the concept of project network modeling and scheduling with probabilistic and stochastic activities via a web based Java Simulation which is operateable over the Internet, and (3) to open a way to compare a project network having different distribution functions.  相似文献   

17.
Discusses the extent to which the practice of psychotherapy places stress upon its practitioners similar to those experienced by the native fisherman of the Trobriand society, and the extent to which such stresses give rise to magical thinking. The observations in this article are based on a study of Trobriad society by Malinowski (in J. Needham's Science, Religion, and Reality). The author concludes that the ideal temperament for the psychotherapist if he is to behave rationally in his work involves the ability to reject the magic which the uncertainties of his task and the demands of his patients throw upon him; to be flexible enough to change his views when the need is clearly indicated, but not to be a weathervane; and to be happy enough in his personal, extratherapeutic life to accept failures as part of the day's work. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

18.
The terrorist attack on September 11, 2001, and subsequent potential threats to the United States transportation systems have presented an urgent need to elevate the security of the transportation infrastructure and to develop emergency response plans to quickly react to the possible consequences of an extreme event. Highway bridges, as critical components of the nation’s transportation network, have been brought to closer attention by government agencies. A research project was conducted to identify strategies and technologies to restore the use of a damaged bridge quickly. One of the tasks associated with the research was to perform several case studies of previous bridge replacements following extreme events. These events include explosion and fire caused by vehicle impact, vessel collision with a bridge, and damage caused by flood and earthquake. By studying the cases, the research team seeks to identify and expand on lessons learned and address which actions did and did not work well given the circumstances of the incident. These lessons have great value to the people who need to develop and implement an emergency response plan.  相似文献   

19.
APA is in very good shape financially as a result of procedures and attitudes within the Council of Representatives and elsewhere in the Association's governance. We are able to maintain a balanced budget and to enjoy surpluses--though we can be certain that this will not continue forever--and at the same time to be reasonably solicitous of personal and social needs of the disadvantaged in our midst. At a time when the federal government finds it necessary to abandon or drastically cut programs to help the voiceless and other victims of our society, it is heartening to note that in our small way we psychologists are able to walk both sides of the street, that is, to help those who need our help, but to do so without imperiling our financial solvency. Despite spiraling inflation, the Association continues to produce a surplus from operations, as mandated by the Council of Representatives, while being responsive to the needs of the membership in a swiftly changing environment. In addition to the goal of building our reserves, we are dedicated to the continuation of all existing APA programs in our constant attempts to advance psychology as a science and profession and as a means of promoting human welfare. Financial statements for 1979-1981 are provided. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

20.
The concept of low impact development (LID) applies decentralized on-site runoff source control to storm water management. LID is an integration of bioretention and vegetated landscapes to maintain a catchment’s hydrologic and ecological functions. In current practice, the LID implementation is quantified for the specified watershed development. During the dynamic development process, the existing LID facilities have to be improved according to the incremental changes in the watershed. This technical note presents an on-site hydrologic approach to relate the required incremental storm water retention volume to the alteration of surface imperviousness in the tributary area. This approach allows the storm water retention volume to be tailored according to the stage of the watershed development. Cumulatively, the total storage volume can be achieved though multiple stages of the watershed development. The incremental retention volume is found to be related to the local average event rainfall depth. Design charts were produced and normalized by the local average rainfall event depth for generalized applicability.  相似文献   

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