机载临时支架装置的应用分析

《煤矿安全规程》规定:"掘进工作面到永久支护之间,必须使用临时支架或金属前探支架,严禁空顶作业",多年以来,困扰煤矿生产的一项技术难题就是巷道掘进临时支护的安全问题。目前我国主要采用窜管前探梁和支柱加横梁两种临时支护形式。但是这两种方式不但降低了掘进效率,并且造成了着空顶区的锚固作业的安全隐患。针对这种情况,凤凰山矿引进一种掘进机机载临时支护装置,替代原有的临时支护方式。该装置实现了临时支护的机械化,使锚护工人的安全得到了有效的保障。但也存在一些问题,通过分析这些问题,指明超前支护设备的改进方向,以发展快速掘进中的临时支护技术。     

煤矿巷道施工技术与管理

一次成巷及其作业方式有一次成巷施工法和分次成巷施工法。分次成巷施工法是先以小断面掘进,架设临时支架,在一定时间后再刷大至设计的断面,进行永久支护。本文主要阐述了煤矿巷道掘进与永久支护平行作业、顺序作业、交替作业,及正规循环与多工序平行作业等技术问题。     

全巷道超前锚支机的研究与应用

综掘煤巷临时支护一直以来都是采用金属前探梁进行临时支护,在复杂地质状况下临时支护的安全很难保证,自机载临时支护装置使用以来,虽然得到了较好改善,但是国内还未能实现掘、支、锚设备作业连续化,需要研究一个与掘进机相配套的支、锚设备,实现巷道施工机械化连续作业。为了改变现有掘进系统和工艺,提高掘进效率,实现减人提效,开始探索试验高效快速掘进的超前锚支系统,降低职工劳动强度,改善现场施工条件,提高生产环节的自动化程度,缩短支护时间,提高生产效率的目的。     

掘进机机载锚杆钻机及配套支护技术探讨

对掘进机机载锚杆钻机及配套支护技术进行了研究,将掘进机与锚杆钻机有机集成于一体,实现综掘工作面的掘进、锚杆孔钻、锚杆安装的联合机械化作业,阐述了掘进机机载单臂锚杆钻机的结构组成及性能特点,结合高强度锚杆的支护形式及工艺,提高了锚护强度及效率。     

探析复杂地质条件下巷道快速综掘临时支护技术

本文在研究复杂地质条件下巷道快速综掘临时支护技术的过程中,首先是分析了在复杂地质条件下掘进支护技术的关键点,在明确支护重点后,描述了当前使用普遍的几种临时支护技术。接着对综合机械化掘进临时支护技术体系进行详细分析,该体系的应用缩短了作业时间,是适应目前煤矿的实用临时支护技术。最后对临时支护技术的未来发展作出展望。     

掘进工作面临时支护技术的发展与应用

目前现代化矿井存在掘、支时间比例失调的矛盾,临时支护劳动强度大,效率低,支护速度影响掘进速度,分析了目前国内外掘进工作面临时支护技术的发展与应用以及存在的问题,提出今后掘进工作面临时支护技术的发展方向。     

厚煤层底板巷大断面在软岩支护技术中的应用

本文论述了厚煤层底板巷大断面软岩支护技术的新尝试——"一梁三索"锚网索喷支护技术,以及支护参数。本法使用3.5m长"U"型梁"一梁三索",使顶板支护成为一个整体,通过增加支护稳定性,解决了顶煤松软、破碎,抽漏造成锚杆、锚索支护失效的问题。切眼施工时采用炮掘施工,具体施工顺序:打前探锚杆—掘进机切割上半部——临时支护——打锚杆眼,安装锚杆——铺钢筋网——拧紧螺母——打锚索眼,上锚索——上"U"型钢梁,紧固——掘进机切割下半部——打两帮锚杆——铺钢筋网——拧紧螺母——喷浆。实践证明,厚煤层底板巷大断面"一梁三索"锚网索喷支护技术是一种技术先进,经济合理,安全可靠的支护方式。     

掘进机操作程序及必须注意的几个问题

掘进机设备可分为两类：一类是悬臂式掘进机,其适用范围广,另一类是连续采煤机和掘锚机组,两者都能实现煤巷快速掘进,开机率掘进率都较高。我国目前仍以悬臂式掘进机单巷掘进为主。本文主要阐述了掘进机的操作程序、掘进机操作与工作时必须注意的问题。     

液压超前支护装置在煤矿综掘工作面中的应用

本文对塔什店煤矿液压超前支护装置进行了概述,对掘进工作面临时支护进行了对比分析,是一次掘进超前支护的技术改造,解决了生产过程中设备及人员的安全问题,提高了工作效率。     

两台掘进机台阶法施工在大断面岩巷中的应用

本文针对兖州煤业鄂尔多斯能化公司转龙湾煤矿副斜井施工中遇到的掘进断面大,支护复杂,安全性低,施工工序多等特点,精心组织,科学管理,不断优化施工方案,最终采用两台掘进机台阶式施工方案克服了掘进断面大,速度慢,安全性低等难题,实现了掘进、架36U型钢架、砌碹多工序平行作业的施工工艺,尤其在10月份实现了副斜井一次成巷174m的好成绩。为我们今后遇到类似的大断面岩巷施工提供了一些参考和经验。     

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。