论矿山测量对煤矿生产的作用

矿山测量是煤矿基础技术工作,高精度的测量成果能够为煤矿生产提供准确的参考数据,在日常的安全管理工作中也依赖于矿山测量的持续观测与分析,以矿山测量为基础的图纸是煤矿生产的最重要资料。矿山测量对煤矿生产的作用主要体现在为巷道掘进提供方向、为保护煤柱留设提供数据支持、为安全管理提供技术支持三个方面,对安全管理的作用常见的包括防治水工作中的定位工作、顶板沉降的观测和对巷道相对空间位置关系的精确定位三点。     

五矿邯邢矿业矿山大型贯通设计书应用

新建矿山巷道贯通测量的工作,担负着整个矿山企业的开拓、采准、切割、回采巷道的测设和贯通任务。如何提高测量精度,使测量工作更好地服务与生产,显得更加重要。     

浅谈响水矿回风斜巷掘进工作面临时支护方式及应用

煤矿巷道掘进过程中,工作面临时支护安全问题是困扰煤炭生产多年的一项技术难题。应该本着科学规范、先进、实用的理念设计巷道掘进工作面的临时支护结构,保证岩体稳固,减少顶板冒落事故。煤矿掘进树锚支护中采用打设点锚进行临时支护,是对破碎围岩进行有效控制,保证掘进工作面安全施工的关键。     

煤矿锚杆支护技术及工艺研究分析

锚杆支护技术是确保煤矿巷道安全的重要保护措施之一。实际生产中要立足于锚杆支护技术原理,严格遵守设计工艺,为煤矿巷道工作面的安全提供确切保障。     

贯通测量在嵩山煤矿测量工作中的实施

文章结合在嵩山煤矿测量工作中的实践,首先针对矿山贯通测量的主要工作内容进行了简要分析,进而提出了在贯通测量过程中需要重点关注的几方面问题。在此基础上,以结合实际案例的方式,论证了贯通测量在嵩山煤矿测量工作中及矿山生产建设中所发挥的重要意义。     

全站仪四架法在复杂条件下贯通中的应用

在条件复杂的巷道掘进过程中,为保证贯通的精度,在掘进过程中采用全站仪四架法进行控制测量,并采取有针对性的措施来保证巷道精确贯通,为复杂条件下巷道的贯通提供了技术保障,为测量工作积累了经验。     

浅谈侏罗纪大倾角特厚煤层综放开采工作面区段护巷煤柱稳定性机理及合理留设保护煤柱的方法

文章理论分析了侏罗纪大倾角特厚煤层综放开采工作面护巷煤柱稳定性机理;介绍了宝鸡秦源煤业公司戚家坡煤矿如何科学合理留设区段煤柱,保证安全生产,降低巷道维修成本,提高矿产资源回收率。     

关于巷道掘进遇陷落柱支护方式选择的探讨

煤矿地下开采，在巷道开掘过程中会遇到不同的地质构造，这些地质构造不仅对煤矿生产和安全造成地质问题，而且还会严重影响矿井的正常生产建设。巷道掘进过程中遇地质构造首要解决的问题就是变更合适的支护方式，比如遇断层，褶曲、冲刷带、陷落柱等地质构造，会根据地质构造对围岩的破坏程度选择不同的支护形式，确保巷道支护安全。对于掘进工作面过陷落柱支护形式也各不相同，为此，特对巷道掘进遇陷落柱支护形式选择进行探讨。     

数值模拟在陶二煤矿深部回采巷道支护技术中的应用

矿井进入深部开采过程中矿山压力是影响巷道支护可靠性的主要因素。近几年来陶二煤矿在深部开采过程中部分采准巷道开挖后表现出巷道变形量较大，支护参数确定困难，2217下巷掘进工作面应用非线性数值模拟软件进行巷道支护设计,通过工业试验，巷道变形量得到有效控制，满足了安全生产要求。     

适合中小煤矿的瓦斯地下抽采技术探讨

对于中小煤矿而言，安全是其生产的生命，影响煤矿瓦斯渗流速度最主要的因素就是煤层渗透率、压力梯度与钻孔布置。一般情况下，顺煤层钻孔抽采法包括巷道掘进边掘边抽法、回采工作面走向平行钻孔法、巷道掘进先抽后掘集中方式，在进行钻孔时，需要根据钻孔位置选择合理的钻机尺寸，这样才能够保障抽采的效果，本文主要分析适合中小煤矿的瓦斯地下抽采技术。     

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.     

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.     

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.     

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.     

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.     

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.     

Multinomial distributions applied to random sampling of particulate materials

When sampling a batch consisting of particulate material, the distribution of a sample estimator can be characterized using knowledge about the sample drawing process. With Bernoulli sampling, the number of particles in the sample is binomially distributed. Because this is rarely realized in practice, we propose a sampling design in which the possible samples have a nearly equal mass. Expected values and variances of the sample estimator are calculated. It is shown that the sample estimator becomes identical to the Horvitz–Thompson estimator in the case of a large batch-to-sample mass ratio and a large sample mass. Simulations and experiments were performed to test the theory. Simulations confirm that the round-off error due to the discrete nature of particles is negligible for large sample sizes. Sampling experiments were carried out with a mixture of PolyPropylene (PP) and PolyTetraFluorEthylene (PTFE) spheres suspended in a viscous medium. The measured and theoretical variations are in good agreement.