新龙矿业公司极破碎难采矿体采矿方法优化研究

新龙矿业公司的金锑矿脉属于破碎带型矿床,矿岩松散破碎,开采难度大。应用突变评价理论选择下向分层进路胶结充填采矿法为该矿最佳采矿方法,该采矿技术现已在该矿应用,预期效果良好,可为类似矿山的开采提供借鉴。     

岩石失稳破裂的能量原理分析

岩石是一种含有初始微缺陷的天然工程材料，其内部结构和变形过程十分复杂，通过分析指出如果月能量的观点研究岩石的破坏问题，就有可能发现岩石破坏的物理机理。基于这一思路，认为岩石在变形初期阶殳具有能量耗散的特点，用耗散结构理论研究这一过程；受力超过峰值点，岩石发生突然破坏，瞬间释放出大量的惶量，这一过程可以用灾变理论进行研究。最后指出了岩石能量原理需要研究的主要内容。     

电力系统暂态稳定的简化突变论模型

根据Thom提出的突变理论,将研究等值双机系统暂态稳定用的数学模型转换成相应的突变论模型。从而不必进行费时的非线性微分方程组的数值解,就可快速算出在经历大干扰后的电力系统能否保持暂态稳定。     

三峡大江截流戗堤坍塌机理研究

 从突变理论及自组织临界性理论，对三峡大江截流戗堤坍塌机理进行研究。认为在三峡大江截流特定的水流条件下，可以形成临界坡度和稳定坡度两种坡度。抛投体堆积达到临界坡度时，发生坍塌，是一种自然规律。在水流中，堆积体是否坍塌主要取决于堆积体粒径与水流流速的相对关系，坍塌的规模取决于堆积体的高度。据此以研究解决坍塌问题的对策措施。     

基于突变理论的矿柱失稳破坏研究

针对岩体变形破坏具有的突变性,结合材料力学理论,建立了岩梁-矿柱的尖点突变模型。利用该模型研究矿柱失稳破坏发生的机理,并得出系统发生失稳破坏的条件及发生失稳破坏时系统释放的能量。研究结果表明,岩梁-矿柱系统的稳定性取决于系统自身的力学-几何特性,与外界因素无关。最后,以某金矿为实例,利用系统失稳条件对其采场结构参数的选取合理性进行了分析判断。     

切削过程的分叉与突变

根据非自由切削模型和切削试验研究了切屑流动的分叉突变原理,结果表明：在切削层图形系数gs＝1的两侧有两个分叉点gs1和gs2,形成一个分叉区间（gs1,gs2）;单位切削功率的连续多极值取向是切屑流动分叉的原因;在分叉区间切屑流动状态的改变呈现出典型的尖点突变特征;突变的滞后性对切削力及切屑旋向有明显的影响。     

Biosphere synergism and the humankind virtual path to the hydrogen civilization era

The social synergetic analysis of the biosphere and humanity shows that in near future two attractors (human paths) will really compete: the first is an irreversible biosphere catastrophe and the second is a motion along the vector ‘Hydrogen energy → Hydrogen economy → Hydrogen civilization’. In accordance with the basic assumption of the social synergetics about a fundamental possibility of the mankind conscious choice of its own post-bifurcation path to the future, the analysis based on Kondratieff's study about large cycles of the economic development leads to the fundamental conclusion: two historical stages of Hydrogen Civilization will correspond to Kondratieff's sixth (∼2030–2090) and seventh (∼2090–2150) hydrogen energy technological cycles with a probability up to 100%.     

A risk management tool for tackling country-wide contingent disasters: A case study on Madagascar

Governments are key players in managing disaster risks, and fiscal risk management has become an integral part of disaster risk management. However, the ability of governments to implement disaster risk management strategies differs significantly across countries, depending on their capacity and resource constraints. The CatSim model and its most recent version presented in this paper helps to fill part of the information gap regarding the capacity and resources of a government to deal with natural disaster risk. We provide an in-depth example how the model works for the case of managing cyclone risk in Madagascar. In doing so, we provide recommendations as to how some of the more difficult concepts from the disaster risk theory and modelling field can be most easily understood by non-technically trained stakeholders. Such understanding is beneficial in facilitating consensus-building among various risk bearers from different sectors regarding options for managing risk.     

突变理论的旋转机械突变故障研究进展

简要介绍突变理论的7种初等突变模型和5种突变指征,结合初等突变模型和突变指征指出突变理论在突变故障中的3种应用方式。综述突变理论在碰摩、气流激振、油膜失稳等突变故障的机制、预测、控制等方面的研究进展,并结合随机突变理论对突变故障的研究方向进行展望。     

顶板-锚拉支架系统稳定性的突变理论分析

本文对裂纹顶板系统的稳定性运用突变理论分析，其失稳模式可归结为突变理论中的尖点突变模型，并由该模型的分叉集方程导得顶板大面积冒落的临界条件。对照分叉集方程的图形，从几何上分析系统参数变化对顶板稳定性的影响。形象地观察到顶板岩体的流变特性和裂纹顶板应力集中部位的局部破碎累积量是导致顶板冒落的主要因素。在文中图2所示锚拉支架的补强充分的条件下，由系统参数决定的控制点路径无法达到分叉集右分枝，顶板冒落的临界条件得不到满足，相应顶板处于稳定状态。