阶状断面和组合锚杆在开双切眼中的研究应用

针对仰采综采工作面开双切眼支护和安装支架存在的问题,采用组合锚杆联合支护和阶梯状断面,解决了大断面仰采倾斜工作面顶板支护和安装支架的技术难题,安全生产得到了有效的保证。     

综采改造工作面切眼快速刷大技术研究

综采改造工作面开切眼巷道是安装综采设备,进行开采前准备的巷道。由于液压支架架长5.3m,从而要求其断面必须是跨度较的掘进巷道。在综采改造工作面(综采跳采工作面)中,受地质条件、支护材料及巷道断面的影响,如果在短时间内掘进出改造切眼巷道,则巷道顶板压力不太明显,能保证工作面综采设备安装时对巷道高度及宽度的要求。以淮北矿业集团海孜煤矿422综采工作面做改造切眼为例,阐述综采改造工作面切眼快速刷大掘进与安全管理方法。     

锚杆锚索网联合支护在大断面综采切眼中的应用

针对望云煤矿3102综采切眼的实际,依据锚杆支护机理,探讨了合理的巷道支护参数和方案,并对实施效果进行了检测和分析,证实"锚杆 锚索 金属网"联合支护在大断面综采切眼IV类巷道的试验是成功的.     

麦垛山煤矿首采面切眼支护设计优化

开切眼作为大断面支护重点工程,支护参数选择不当、顶板管控不到位容易发生顶板事故。通过对麦垛山煤矿130602首采工作面支护参数优化,切眼宽度由8.0m减小到7.7m,锚杆长度由2.2m调整为2.5m,锚杆间排距由800mm×800m间排距,调整为700mm×1000m并采用锚杆、锚索同排布置的方式提高"锚杆、锚索纵梁"受力效果,杜绝了顶板下沉、离层、底鼓、切顶等现象,快速高效完成了切眼施工。     

厚煤层大采高开切眼锚网支护技术研究

针对霍尔辛赫煤业综采工作面3207工作面开切眼的断面大,跨度大,煤岩体比较破碎,支护困难的特点,依据强力一次支护理论及原则,采用高预应力强力锚杆锚索组合支护系统支护,并进行矿压监测,监测结果,强力支护系统能够很好的抑制围岩的离层破碎,防止巷道变形破坏。     

全煤大断面开切眼支护技术的推广与应用

为解决大断面开切眼掘进过程中的顶板下沉量大、煤壁片帮及底鼓严重问题,提出了一种适合大断面开切眼掘进一次成巷支护技术,采用锚杆锚索配合钢带联合支护技术。研究结论表明:采用锚杆锚索配合钢带联合支护技术围岩属性区较小,且巷道围岩受力稳定。在马脊梁矿8802开切眼采用此支护技术,矿压监测结果显示顶板下沉量为45mm、底鼓量为32mm,两帮移近量为28mm。围岩变形在控制范围内,能维持巷道稳定。     

锚杆锚索网联合支护在大断面综采切眼中的应用

针对望云煤矿3102综采切眼的实际，依据锚杆支护机理，探讨了合理的巷道支护参数和方案，并对实施效果进行了检测和分析，证实“锚杆＋锚索＋金属网”联合支护在大断面综采切跟Ⅳ类巷道的试验是成功的。     

特大断面切眼受载变形特征与支护技术研究

为了解决特大断面切眼巷道支护难题,以曹家滩煤矿122106切眼为工程背景,结合理论分析与离散元数值模拟研究了不同顶板跨度条件下巷道受载变形特征,提出了"二次成巷+单体液压支柱+高强锚网索+W钢护板"的大断面煤巷高强度、高预紧力、低密度减跨支护技术,提高了支护效率,显著加快了巷道掘进速度。研究表明,当顶板跨度超过9m后其稳定性大幅下降,极易出现表层煤体破坏垮冒的现象;锚杆的承载性能与预紧力紧密相关,预紧力越大,越有利于锚杆发挥其承载性能;通过现场实测对研究成果进行了验证,巷道未出现明显变形,支护体受载始终稳定。     

大断面切眼煤机窝子施工工艺优化

结合黄陵矿业有限公司一号煤矿回采工作面切眼断面、支护参数及设备配置情况,设计和优化了回采工作面大断面切眼煤机窝子施工工艺,实现了大断面切眼煤机窝子的高效施工,有效地降低了大断面切眼支护费用、减少了大断面切眼的维护次数。通过实践证实了优化后施工工艺的可行性,为一号煤矿回采工作面大断面切眼施工煤机窝子积累了成功的经验,可为类似地质条件下施工回采工作面切眼煤机窝子借鉴。     

大断面综采切眼锚网索长钢梁联合支护技术应用的推广

根据实际生产需要,保证高产、高效矿井建设,减少煤炭损失,本矿采用厚煤层大采高分层开采的方式,利用大断面综采切眼锚网索支护技术,为综采工作面的快速安装和巷道的维护创造良好条件,为安全生产提供了可靠保障,具有很好的支护使用前景。     

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.     

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.     

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.     

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.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。