岩溶发育地区基建矿井综合防治水技术研究

简要阐述喀斯特地形地貌的岩溶发育地区基建矿井综合防治水的一般措施,以及预防水患而需提前施工的泄水巷等主要内容,着重分析了花秋二矿基建期间因雨季洪涝时矿井被浸淹的原因,在此基础上,整体上的、多方面的、分类划项的进行防治水设计并进行具体实施,并在实践中取得了成功,保证了矿井3年来无任何水患的发生。     

五水平放水试验设计

方庄一矿属华北隐伏型煤田,主采煤层为石炭系———二叠系二1煤层。目前方庄一矿已进入了五水平-400 m开采阶段,随着开采水平的延深,煤层底板承受高承压水的威胁也越来越严重。特别是在开采条件下,矿井内断层有可能沟通L8灰岩水和奥灰水的联系,造成淹井事故。并且四水平南翼明显径流带与33-8水文观测孔存在密切水力联系,但流经五水平范围的具体路径不明。所以,在该区域内对L8灰水进行放水试验,查明妨碍采区的区域水文地质条件和水力联系参数,就显得尤为重要。     

凿井水下底卸式自动卸料吊桶

吊桶是立井井筒开凿时期提升矸石和运送材料及升降人员的主要容器,吊桶的卸矸目前多采用挂钩式或座钩式卸料方式;但是随着矿井的开凿深度不断延伸,在过透水层时,由于探放水不及时或涌出水比较大,超出了井筒的排水量,或者是由于冷冻井在解冻后,井筒的井筒质量不过关,各别井壁也会发生透水事故;这就会出现淹井事故,有时淹井深度达二三百米。对于处理这种淹井事故,往往只有一个办法,那就是用沙或混凝土对井筒回填;这就需要吊桶在下到几百米下的水底自动把料卸掉,但现在矿井常用的挂钩式吊桶和座钩式吊桶已经不能满足这个需要了。     

大埋深矿井封闭不良钻孔探测技术研究

赵固二矿井田内8006钻为封闭不良钻孔,该孔对工作面及盘区大巷布置均会造成影响。由于钻孔施工年代距今较远,部分资料不完善,在水压作用下可构成导水通道,将多层含水层水导入开采煤层,造成严重水害。针对以上情况,根据矿井采掘层位与各含水层对应关系,分四区段对8006钻孔进行探测分析,使得在资料缺失情况下处理大埋深高水压矿井内封闭不良钻孔逐步条理化、清晰化。     

浅谈矿井水现状及处理技术

<正>目前,我国煤矿井下年排放矿井水达45亿立方米,利用率为43.8%,远低于发达国家80%左右的标准,大量排放的矿井水不仅造成环境污染,也造成了水资源的浪费。矿井水的主要来源是大气降水,还有一部分来源于地表水、断层水、含水层水、采空区水,那么如何让这些水资源变废为宝?本文就矿井水资源现状以及矿井水处理技术做一浅谈。一、矿井水资源的种类矿井水的基本水质与当地地下水水质相同,但由于流经采     

矿井水文地质特点与防治水技术探讨

近几年，随着矿井开采行业的发展，土地层的地质状况以及水文条件越来越差，矿井事故发生频率越来越高，突水淹井事故尤为频繁。突水事故不仅影响了矿井开采的正常运作，对施工人员的生命安全也产生了巨大的威胁。矿井水害的种类较多，较为突出的有地表水、老窖水、孔隙水、裂隙水以及岩溶水五种水害，提高防治水技术是矿井开采行业管理者的当务之急。笔者结合多年实地工作经验，从矿井水文地质特点着手，对矿井防治水技术作了简要分析。     

吕家坨矿矿井水开发利用

<正>在煤炭开采的过程中,矿井涌水量一般较大(平均采1吨煤,矿井涌水量为7.5吨左右)。我国很多煤矿一方面严重缺水,另一方面矿井水未经处理直接外排,造成大量水资源的浪费,并且污染环境。煤矿矿井水既是一种具有行业特点的     

动水条件下矿井突水快速治理与恢复技术研究

矿井突水是矿井重大灾害之一,近年逐渐成为影响煤矿安全生产的主要矛盾。矿井深部开采在高围压、高地温、高水压的条件下,受到煤层底板各隔水层、含水层中陷落柱、断层及裂隙带威胁,在采动影响下,与奥陶系灰岩含水层形成导水联系,进而发生矿井突水事故,因此矿井水害防治一直是煤矿安全生产的重点工程。     

高矿化度矿井水处理技术综述

文章对各种高矿化度矿井水的处理技术进行了综述,重点论述了反渗透技术处理高矿化矿井水在我国的应用情况,指出反渗透技术是今后高矿化度矿井水脱盐处理技术的主要发展方向。     

谈矿井采空区水害防治

水灾是煤矿五大灾害之一,在煤矿建设和生产时期,常常会遇到水的危害,发生程度不同的透水事故。轻者造成排水设备增多,费用大,原煤成本高,生产条件恶劣,管理困难,采区持续紧张,影响生产建设的发展;重者直接危害职工生命安全和国家财产的安全,造成伤亡或淹井事故。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.     

Input/output ranges and performance: an examination of US machine tool producers

Despite the establishment of high-tech multinational enterprises (MNEs) in Ireland since the late 1950s, the country did not succeed in closing the technological gap with most of its EU counterparts. The weak National System of Innovation (NSI), and in particular low business and government R&D levels, combined with a lack of research and technology linkages between MNEs and indigenous firms, explain these poor results. However, the Shannon region in the West of the country presents some specific institutional characteristics that could theoretically make the region a strong technological enclave. The various actors in the region - i.e. the administrative, financial, political and research institutions, as well as the business organizations - have indeed infused a new type of economic development. After a brief review of the available concepts and models articulated around these actors and their interrelationships, the paper analyses whether the Shannon region, taken as an illustrative example, mirrors a specific economic and technological localized setting. The study is based on a survey of indigenous and foreign firms.