神农磷矿薄矿体开采问题及对策

简要介绍了神农磷矿针对大面积薄矿体赋存的特殊情况 ,所采取的回采措施。     

钟祥杨榨累托石采矿方法探讨

根据钟祥杨榨累托石矿床的特性及矿体赋存情况提出了几种可供选择的采矿方法     

人防通道暗挖法施工方法

高层建筑的人防通道,深埋于地下,采用暗挖法施工,可减少土方开挖量,不影响地面道路及其他设施的正常使用,这是一种经济合理的施工方法。     

How job demands affect partners' experience of exhaustion: Integrating work-family conflict and crossover theory.

This study among 168 couples of dual-earner parents uses insights from previous work-family conflict and crossover research to propose an integrative model delineating how job demands experienced by men and women carry over to the home domain. The authors hypothesized that for both men and women, job demands foster their own work-family conflict (WFC), which in turn contributes to their partners' home demands, family-work conflict (FWC), and exhaustion. In addition, they hypothesized that social undermining mediates the relationship between individuals' WFC and their partners' home demands. The results of structural equation modeling analyses provided strong support for the proposed model. The hypothesis that gender would moderate the model relationships was rejected. These findings integrate previous findings on work-family conflict and crossover theories and suggest fluid boundaries between the work and home domains. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

改进GM(1,1)模型对地铁开挖沉降的预测

为了提高GM(1,1)模型在地铁施工过程中地表沉降量预测的精度,预防较大沉降或其他危险出现,提出了改进GM(1,1)模型预测方法.通过对比不同原始序列个数建立起来的预测值并确定最佳原始序列个数后,对GM (1,1)模型进行优化,并对构造背景值进行优化.通过缓冲算子对原始序列进行优化,之后再构造背景值进行优化.结果表明,背景值对模型的预测影响较小,缓冲算子在原始序列变化较大、变化不平顺时优化较好.     

When distress hits home: The role of contextual factors and psychological distress in predicting employees' responses to abusive supervision.

We developed a model of the relationships among aggressive norms, abusive supervision, psychological distress, family undermining, and supervisor-directed deviance. We tested the model in 2 studies using multisource data: a 3-wave investigation of 184 full-time employees (Study 1) and a 2-wave investigation of 188 restaurant workers (Study 2). Results revealed that (a) abusive supervision mediated the relationship between aggressive norms and psychological distress, (b) psychological distress mediated the effects of abusive supervision on spouse undermining, (c) abusive supervision had a direct positive relationship with supervisor-directed deviance, (d) the positive relationship between psychological distress and spouse undermining was stronger for men as opposed to women, and (e) employees engaged in relationship-oriented occupations reported greater levels of abusive supervision and psychological distress. Implications for theory and practice are discussed. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

坑道截面积对防护门上爆炸冲击波影响研究

采用大型有限元软件LS-DYNA进行了爆炸冲击波的数值模拟,分析对比当防护门与爆心之间的距离一定时,相对于无限自由场条件,坑道的截面积对防护门上爆炸冲击波荷载的影响,通过仿真计算,得到了考虑坑道截面积的修正方法。     

双侧壁导坑法在小净距大断面地铁车站施工中的应用

以某浅埋暗挖城市地铁车站为工程背景,研究了双侧壁导坑法在小净距大断面地铁车站施工中的可行性。通过有限元数值模拟计算得到了该施工方法下地铁车站的位移和塑性区时空演化规律,并将计算结果与相关规范值进行比对。分析结果表明,Ⅳ级围岩条件下小净距大断面隧道使用该工法施工时所引起的隧道拱顶沉降、水平收敛及塑性区发展均在允许范围之内,能保证整个施工过程的安全。     

地下采掘诱发斜坡失稳破坏机制研究——以武隆鸡尾山崩滑为例

对国内外地下采掘诱发山体崩滑案例与研究现状进行详细归纳,系统总结此类地质灾害发生的主要特点。为进一步加深对采动滑坡机制的认识,以重庆武隆鸡尾山崩滑灾害为例,采用基于连续介质的离散元方法,建立鸡尾山崩滑体大型三维数值模型,借助GPU高性能加速计算技术,再现滑坡体在地下采掘作用下的失稳破坏过程,研究地下采掘对坡体应力场和位移场的影响,分析崩滑体的形成机制与运动规律。研究结果表明：鸡尾山崩滑体的发生过程为“前缘关键块体外侧局部崩塌→后缘坡体整体滑动→岩溶带剪断突破失稳”,并从应力和变形的角度对这一失稳模式进行精细分析,认为地下采掘是导致鸡尾山崩滑发生的主要诱发因素。     

地铁工程中暗挖段的施工技术

在施工的过程中，由于施工环境复杂，稍有不慎就会引发安全事故。尤其对于暗挖段的施工来说，很容易受到不良地质条件的影响。本文对地铁工程中暗挖段的施工技术进行了探讨。