非煤露天矿山岩质边坡稳定性评价标准探讨

根据露天矿山的生产工艺特征,将岩质边坡划分为总体边坡、路间边坡和台阶边坡三种尺度,并对其控制因素、破坏模式进行了分析;结合土木工程边坡规范和非煤露天矿山边坡规范的边坡设计安全系数取值,讨论了国内外非煤露天矿山边坡设计安全系数的要求,提出了六条建议;综合考虑服务年限、边坡尺度规模的设计安全系数改进方案,并引入失稳概率,拓展了不同尺度边坡稳定性评价的设计标准,可有效提升非煤露天矿岩质边坡稳定性评价的合理性和科学性,进一步完善了矿山边坡设计理论和方法。      

福泉市某化工项目边坡稳定性评价及支护措施

某化工项目边坡工程位于贵州省福泉市马场坪镇,边坡为永久性岩质边坡。在对边坡工程地质特性及边坡岩土工程分析与评价的基础上,对边坡的稳定性进行了评价,并提出了相应的边坡支护措施,研究结果可为工程设计与施工提供重要的地质数据支撑。     

金堆城露天矿北部边坡稳定性分析

通过对金堆城露天矿北部边坡的地质结构、地下水和爆破震动等影响边坡稳定性因素的分析，结合对边坡进行力学模拟计算，对边坡的稳定性进行了评价，最后提出了边坡治理与维护的建议。     

我国露天矿山边坡位移监测技术的新进展分析

露天矿山边坡位移监测是矿山边坡稳定性监测的重要内容,也是矿山边坡管理和确保边坡安全的基础。对近年来我国露天矿山边坡位移监测实践中应用的一些新技术和取得的新进展进行了综述分析,对露天矿边坡位移监测方案设计和边坡安全管理具有一定参考意义。     

基于强度折减法的巴彦哈尔露天边坡稳定性分析

为了能够更真实评价露天矿边坡稳定性及确定合理的边坡角,本文以内蒙古巴彦哈尔金矿北露天边坡为研究对象,采用有限元分析方法对代表性的边坡进行了稳定性分析,研究边坡在受力状态下的应力应变,从而估计边坡的破坏发展情况,结合摩尔库伦屈服准则和强度折减法计算边坡安全系数,并分析边坡破坏模式,揭示失稳机理,进一步确定合理的边坡角。     

基于强度折减法的巴彦哈尔露天边坡稳定性分析

为了能够更真实评价露天矿边坡稳定性及确定合理的边坡角,本文以内蒙古巴彦哈尔金矿北露天边坡为研究对象,采用有限元分析方法对代表性的边坡进行了稳定性分析,研究边坡在受力状态下的应力应变,从而估计边坡的破坏发展情况,结合摩尔库伦屈服准则和强度折减法计算边坡安全系数,并分析边坡破坏模式,揭示失稳机理,进一步确定合理的边坡角。     

矿山边坡地质灾害治理技术的应用研究

为提升矿山边坡的稳定性,避免地质灾害发生,本文首先介绍了矿山边坡地质灾害的常见类型,包括滑坡、崩塌等。其次,强调了矿山边坡地质灾害治理的重要性,这关乎矿山的安全和可持续发展。最后提出了矿山边坡地质灾害治理技术的应用策略,包括利用斜坡监测预警技术可以实时监测边坡位移,并及时采取防范措施、设计排水系统并表面覆盖,减少雨水对边坡的侵蚀、采用支护技术能够提高边坡稳定性,增强其承载能力、采用边坡切割与重塑技术的应用,调整边坡形态和坡度,避免滑坡的发生。通过上述措施的应用,实现了矿山边坡地质灾害的应对和预防,为相关人员提供了实践参考。     

边坡稳定性及其防治措施的研究

针对我国矿山边坡研究情况,分析边坡产生变形破坏的原因,对影响边坡失稳提出了治理措施,以确保整体边坡的稳定。     

金堆城凹陷露天矿边坡岩体声波测试研究

介绍了声波测试原理、测试方法、测试设备及布孔原则。通过对金堆城露天矿边坡岩体进行声波测试,揭示了边坡岩体的松弛范围及其分布规律。测试表明,边坡岩体的松弛层范围较大,边坡及边坡内部的岩体均为极破碎-破碎岩体,岩体完整性非常差,研究结果为凹陷露天矿边坡形状优化提供了依据。     

论露天矿高陡边坡挖替

率证了露天矿边坡挖潜的意义、内容、原则及依据；以尖山采场边坡探潜为工程实例，介绍了边坡探潜方法及开采境界方案的选择；分析了边坡挖替的工程效果与经济效益；在此基础上，提出了生产中保证边坡稳定的技术组织措施。     

充填系统稳定性的在线监测及评价

为了对充填系统的稳定性进行在线监测及评价,首先基于数字化矿山建设方向,提出充填系统稳定性在线监测的方案设想,介绍充填系统稳定性在线监测内容,主要包括原料供给系统稳定性监测、制备系统稳定性监测、浆体输送系统稳定性监测、采区系统稳定性监测,并介绍各个系统主要监测的内容及监测技术.其次,提出运用三角图法对充填系统稳定性进行评价,将浆体输送系统因子稳定性指数、浆体制备系统稳定性指数和原料供给系统稳定性指数加和为充填系统稳定性指数. 将浆体输送系统稳定性指数、浆体制备系统稳定性指数、原料供给系统稳定性指数分别划分为3个等级:低等、中等和高等,根据3个系统稳定性指数的等级,最终确定充填系统稳定性指数的等级.      

基于未确知测度理论的石英脉型钨矿山采空区稳定性评价

采空区是地下矿山重大安全隐患源,其稳定性是行业科技工作者关注的焦点.以石英脉型钨矿山采空区稳定性评价作为研究对象,基于未确知测度计算理论,构建了适用于脉型矿床的采空区危险性评价体系及分级标准,并应用于矿山评价实践.结果表明:浅孔留矿法单脉开采空区稳定性普遍优于阶段矿房法脉带开采空区,矿柱的回收极大地加速了空区的失稳破坏...     

复杂采空区处理方案的模糊推理系统

对于复杂采空区的现状,采空区处理是亟待解决的问题.在选择充填和封闭联合处理采空区的前提下,通过使用关系矩阵与模糊数学联合的采空区稳定性分析方法,得到了各采空区的稳定性系数,结合采空区稳定性系数及地压监测结果,进行了采空区处理方案的模糊推理系统研究,通过研究能得到与每个采空区相适应的处理方法,为矿山的地压处理提供了相应的理论依据,并为矿山的安全生产提供了保障,同时也对类似采空区处理提供了一定的依据.     

A meta-analysis of normal and disordered personality across the life span.

Debate continues about whether personality, both normal and disordered, can change significantly or is mainly stable across the life span. One issue that receives little attention is the degree to which personality stability coefficients may be influenced by attenuation due to measurement error. The current meta-analysis examines the data from recent research on personality stability, reporting both uncorrected and corrected stability coefficients. Attenuation due to measurement error was found to cause a significant reduction in personality stability coefficients, raising the possibility that some studies may conflate personality change with measurement error. Overall, corrected stability coefficients suggested that the stability of personality across adulthood is high, with only modest change. By contrast, personality during childhood is significantly more changeable. Both normal personality and personality disorders were highly stable across the life span, and patients in therapy experienced no more personality change than did nonpatients. Cross-cultural comparisons suggested relatively similar levels of personality stability cross-culturally, although personality stability among people in South Pacific nations is slightly lower than among those in the United States, Canada, or European nations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Significance of Soil Dilatancy in Slope Stability Analysis

A finite-element approach is used to analyze the slope stability problem and to examine the effect of soil dilatancy on the stability of slopes. It is found that soil dilatancy has a significant effect on the stability of slopes, and that higher values of dilation angle lead to larger stability numbers. Therefore, the stability numbers obtained from limit analyses (lower∕upper bound solutions) are not conservative for granular soils that exhibit a dilation angle smaller than a soil's friction angle.     

Stability in schizophrenia symptoms over time: Findings from the Mount Sinai Pilgrim Psychiatric Center Longitudinal Study.

This study examined the stability of symptoms of schizophrenia over time, focusing on the stability of symptom structure. Symptoms were assessed with the Positive and Negative Syndrome Scale (PANSS). The sample consisted of 215 chronic patients followed up for as long as 4 years. Exploratory factor analysis identified 6 factors. Several statistical techniques were used to examine the stability of these symptoms, including longitudinal confirmatory factor analysis. Low-to-moderate rank-order stability and high absolute stability of the factors were found, with the structure of the PANSS-assessed symptoms consistent over time. The results demonstrate that despite changes in the severity of symptoms in individual patients with schizophrenia, the factor structure and interrelatedness of symptoms have considerable stability over time. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The association of level and stability of self-esteem and depressive symptoms in the acute inpatient stroke rehabilitation setting.

Purpose: Explore the relationship of level and stability of self-esteem with self-reported depressive symptoms during acute inpatient stroke rehabilitation. Research Method: A consecutive sample of 79 participants was administered measures of state self-esteem and mood twice a day for 4 consecutive days. The Geriatric Depression Scale (GDS) was administered at the end of the 4 days. Self-esteem level was calculated by averaging the total self-esteem scores across the assessments, and self-esteem stability was operationalized as the standard deviation of self-esteem total scores. Mood level and stability were calculated likewise. Results: Regression analysis indicated that self-esteem stability moderated self-esteem level in predicting GDS scores, with stable lower self-esteem level associated with the most reported depressive symptoms. Unstable higher self-esteem levels were associated with more depressive symptoms than stable higher self-esteem. This interaction was demonstrated after controlling for mood level and stability, suggesting the independence of self-esteem stability from mood characteristics. Conclusion: Self-esteem stability may be an important variable in identifying individuals at risk for emotional disturbance following stroke. Further exploration of self-esteem stability correlates in this setting is warranted. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Proposal of the partial logarithm of stability constant (PLSC) and its application to rare earth diethylenetriamine-N,N,N′,N′,N″,-pentaacetic acid (DTPA) complexes

The purpose of this article is to propose the idea of “a partial stability constant” for the complex formation of polyamine polyacetic acids with tripositive rare earth ion. Each coordinating group has its own characteristic stability constant,i.e.,“the partial stability constant” and simple numerical addition can be used among the partial logarithm of the stability constant (PLSC), for explanation of the total stability constants. The structures of the rare earth－diethylenetriamine-N,N,N′,N′,N″-pentaacetic acid (DTPA) complexes in aqueous solution has been discussed from the point of PLSC.     

软土地基堤围稳定性计算方法

在软土地基上采用整体稳定分析方法确定的安全系数可能会存在偏大的危险, 当堤身强度高于堤基软土的强度过多时, 可能存在堤基软土失稳的安全系数小于整体稳定安全系数的情况, 因此, 对于软土地基的堤围稳定计算, 除进行整体稳定计算外, 还应复核堤基软土的稳定性.并通过案例证明了该观点的正确性, 同时提出了软土堤基稳定计算的方法, 并以该方法为基础, 提出了堤脚受冲刷情况下的整体稳定性计算方法.可为软土地基的堤围安全提供更合理安全的设计计算方法.      

Predicting relationship stability from both partners versus one.

This study investigated whether longitudinal predictions of stability are improved when assessments of the relationship are obtained from both members of the couple rather than just from 1 partner and, if so, which partner's assessments are the most diagnostic of stability. Both partners in 120 dating couples provided self-report assessments on 16 relationship dimensions, and 6 months later 2 outcomes were examined: stability and emotional distress if breakup had occurred. Assessments from both partners were more predictive of stability than were assessments from 1 (randomly chosen) partner, but the improvement was small. Assessments from female partners were no more predictive of stability than were those from male partners. However, assessments from "weak-link" partners (whose standing on stability indicators was lower than the other member of the couple) were significantly more diagnostic of stability than were those from "strong-link" partners. These and other findings are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)