深孔聚能爆破掏槽技术在张小楼井掘进实践中的应用

针对庞庄煤矿张小楼井传统的钻爆法施工中存在的机械作业效率低、单循环进尺小且爆破作业的安全性难题,基于聚能定向爆破效应,创造性地设计出多缝线射流聚能药卷,可在煤层获得较大范围爆生裂隙网,增大炮孔间距,大大减少钻孔工作量,提高岩石破碎度;同时采用双楔形掏槽爆破,所需掏槽眼数目较少,单位耗药量小,具有极大的优势.因此此高效掏槽技术可在硬岩巷道爆破掘进中进行试验,对解决张小楼井大断面硬岩巷道的安全快速掘进难题有极大的参考价值.     

浅谈岩巷掘进中深孔控制爆破技术

结合工程实践,从影响岩巷爆破效果的诸因素出发,对影响岩巷掘进速度和巷道质量的炮眼深度、掏槽爆破和光面爆破等问题进行了探讨,提出了较为合理的掏槽形式和掏槽参数和光爆参数.     

聚能水压爆破技术在水平岩层隧道施工中的应用

水平岩层的超欠挖控制一直是隧道爆破施工的难题。为解决凤凰隧道开挖过程中的超欠挖问题,分析了水平岩层变形破环的原因和聚能水压光面爆破的原理,进行了聚能水压光面爆破试验。现场爆破试验表明,在水平岩层中采用聚能水压光面爆破技术,施工进度快,爆破质量好,生产成本降低显著,经济效益和社会效益均有了明显提高。     

白云岩巷道爆破掘进楔形掏槽试验研究

掏槽技术是巷道爆破掘进效果的关键,文章介绍了在白云岩巷道中进行单楔形掏槽和双楔形掏槽的爆破试验,并对试验结果进行了分析,结果表明双楔形掏槽技术可提高巷道掘进的炮孔利用率,降低巷道施工成本。     

煤层深孔聚能爆破致裂增透技术在生产中的应用

吉煤集团通矿公司松树镇煤矿为低透气性煤层,瓦斯抽放率低,为了解决煤层低透性、瓦斯抽放率低的难题,利用聚能爆破技术于煤层增透中,笔者引用了聚能爆破增透工艺,进一步分析了煤层深孔聚能爆破在吉煤集团通矿公司松树镇煤矿煤层中影响半径,从而对煤层深孔聚能爆破增透瓦斯抽放工艺技术可行性进行了验证。     

松动爆破在综掘机掘进硬岩巷道时的应用

众所周知，如果在岩巷综掘的过程中遭遇到比较坚硬的岩石时，有可能降低综掘机切割硬岩的效果，因此，我们需要利用钻爆来软化岩体，为了确保附近综掘机的安全，我们一般采用松动爆破方式。本文以古汉山矿东翼轨道大巷为例，简要介绍了松动爆破在综掘机掘进硬岩巷道时的应用，然后给出了钻爆需要的器材、松动爆破的参数以及松动爆破的顺序，最后分析了松动爆破的效果。     

如何提高煤矿掘进爆破速度和质量的技术探讨

结合岩石爆破破碎理论和工程实践,从影响凿岩爆破效果等诸因素出发,对影响岩巷掘进中深孔爆破掘进速度和巷道质量的炮眼深度、掏槽爆破和光面爆破等若干技术问题进行了较为细致地分析和研究.     

白云岩巷道爆破掘进楔形掏槽试验研究

掏槽技术是巷道爆破掘进效果的关键,文章介绍了在白云岩巷道中进行单楔形掏槽和双楔形掏槽的爆破试验,并对试验结果进行了分析,结果表明双楔形掏槽技术可提高巷道掘进的炮孔利用率,降低巷道施工成本。     

探析岩巷掘进如何控制光爆成型技术

<正>目前,我国的岩巷掘进光爆有岩巷开采的宽度窄、自由面少、岩石受压力强,以及施工现场的指挥不力等缺点,同时也存在低投入、低消耗等优点。因此我们要在综合分析我国岩巷掘进光爆的优缺点的同时,以提高岩巷掘进光爆的质量和效益为前提,加强对控制光爆成型技术、提高其质量和效率的方法进行研究和分析。一、我国岩巷掘进爆破现状——以煤矿为例1.爆破器材。在长久的发展中,我国的爆破器材较为齐     

聚能水压爆破控制技术在城市地铁中的应用

聚能水压爆破技术经实际应用,突破常规光面爆破炮眼间距40-50cm的界限,可达100cm,光爆炮眼数量可以减少50%,缩短打眼时间,加快施工进度。本文对聚能水压爆破控制技术进行了概述,并通过列举工程实例对该技术在城市地铁施工中的运用情况展开了分析,以期为关注这一话题的人们提供参考。     

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.     

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.     

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.     

Sixty years of discrimination and diversity research in human resource management: A review with suggestions for future research directions

This article reviews discrimination and diversity research published in Human Resource Management (HRM) over the past 60 years. While discrimination and diversity are very different constructs, it is often informative to study them together, because when people recognize each other's diversity, this can result in bias, stereotyping, and discrimination. We conducted bibliographic searches for terms related to discrimination and diversity as well as a manual search through every title and abstract published in HRM over the last 60 years to assess article relevance. The search resulted in 135 research articles with 136 unique studies (i.e., samples) which are reviewed in this article. Sex and race are the demographics that have been examined the most in HRM, while religion has been examined the least. Moreover, the number of studies examining lesbian, gay, bisexual, transgender, and queer (LGBTQ) employees in the workplace in HRM has grown quickly within the past 10 years, culminating in a recent meta‐analysis. Our review looks at some of the earliest research published, the most recent research published, and the overall trends we identified in the research over the years for both discrimination and diversity articles. We then make future research suggestions and recommendations to advance the study of discrimination and diversity in the coming years.     

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.     

The Early History of the Cumulants and the Gram-Charlier Series

The early history of the Gram-Charlier series is discussed from three points of view: (1) a generalization of Laplace's central limit theorem, (2) a least squares approximation to a continuous function by means of Chebyshev-Hermite polynomials, (3) a generalization of Gauss's normal distribution to a system of skew distributions. Thiele defined the cumulants in terms of the moments, first by a recursion formula and later by an expansion of the logarithm of the moment generating function. He devised a differential operator which adjusts any cumulant to a desired value. His little known 1899 paper in Danish on the properties of the cumulants is translated into English in the Appendix.