露天磷矿边坡岩体变形分析的Fuzzy模型

根据磷矿露天开采工程实际,采用Fuzzy测度理论,将开挖引起岩体边坡移动变形这一客观现象视为一模糊事件,依此建立了边坡岩体移动变形预测分析的Fuzzy测度模型.利用所建模型对已有的矿山边坡岩体移动参数进行了反分析,并对露天边坡移动变形及其稳定性进行了具体的分析,所获结果符合工程实际.     

南平水泥厂边坡稳定性分析与治理技术

南平水泥厂扩建的新线布置在山坡上，由于土石方开挖，形成了44m的高边坡，在土建施工过程中，边坡出现了大面积滑动，严重影响边坡下部水泥粉磨车间的安全。我们通过边坡稳定性分析，采取了上削下挡的治理方案，使边坡保持了长期的稳定。     

云浮硫铁矿露天采场边坡治理

云浮硫铁矿露天采场,由于存在不利于边坡稳定的地质因素,因而有针对性地采取了边坡治理措施:削坡治理滑坡;毛石浆砌或干砌支护边坡;牙轮钻在将形成坡面的上一平台钻抗滑排桩支护边坡;砂浆直接抹面或挂网抹面护坡,以及人工种植护坡等。     

露天矿最终边坡角确定的神经网络方法

露天矿最终坡角确定的合理与否对整个矿山开采的经济效益有直接影响,但传统的确定方法存在一定的局限性,本文提出了露天矿最终边坡角确定的神经网络方法,经实例验证该方法是科学合理的。     

露天矿边坡稳定的概率方法

提出一种评价露天矿边坡稳定的新方法——概率法,并引入了变异系数的概念,通过与极限平衡法比较,证明失稳状态概率比安全系数更接近实际,适用于对露天矿边坡进行验证与设计。     

边坡渐进破坏可靠性分析

渐进破坏是露天矿边坡破坏的一种共性。从破坏的转移概率入手,建立了边坡渐进破坏的可靠性模型。通过某露天煤矿的滑坡实例的计算分析,证明本模型是令人满意的。     

贵定露天石灰石矿不稳定边坡的治理

着重讨论了贵定石灰石矿边坡１２２０～１１８０ｍ水平在Ｉ号剖面左右深层不稳定地段的边坡治理方案。推荐方案强调多台阶同时回采，以推迟靠帮，进而推迟可能的表层滑坡治理。还讨论了护坡矿壁回收及该矿其他不稳定地段边坡治理等问题。     

露天矿边坡稳定性分析及边坡结构参数的优化

基于现场地质勘察和室内试验得到的数据,考虑矿山的地质,水文、地震等因素,建立原有终了边坡模型,对边坡进行稳定性分析,在此基础上提出边坡结构参数的优化方案,为后续边坡的治理提供了可靠的依据。     

水对元宝山露天矿边坡稳定性影响的研究

对于大型富水性露天矿,水是诱发露天矿边坡失稳的主要原因之一。在分析元宝山露天矿水文地质数据的基础上,借助Slide软件和刚体极限平衡法,分析了水对岩体的软化作用和静水压力对元宝山露天矿边坡稳定性的影响,结果表现:水的静水压力对元宝山露天矿边坡稳定性影响较小,边坡失稳的主要原因是水对岩石的软化作用。     

城门山铜硫矿南部边坡加固方案的研究

在城门山铜硫矿露采边坡稳定性研究的基础上，对边坡滑坡体及其加固机理进行了分析，提出了局部滑体加固的计算方法和措施，描述了加固工程的设计程序，并对加固效果观测作了简略介绍。     

宜昌磷矿岩体移动分析的Fuzzy数学方法

针对宜昌磷矿地下开采岩体移动变形问题 ,利用Fuzzy数学理论建立了相应的数学模型。该数学模型和分析方法不仅适用于分析高陡山区复杂地形条件下 ,同时也适用于分析水平地表下开采地表移动变形问题。所建立的数学模型可充分考虑地表地形 ,尤其对分析地表自然坡度α≥ 3 0°的情形仍可充分顾及地表地貌影响 ,反映出地表高差变化影响。同时 ,还就山区开采自然坡稳定问题给出了理论模型     

露天矿预留三角矿体稳定边坡研究与应用

在对边坡岩体滑坡地质因素分析的基础上，探讨边坡滑动机理和边坡岩体破坏模式。用预留三角矿体以实施边坡稳定，获得了较为理想的技术经济效果．     

模糊系统的模型化和优化

过程工业中的生产过程变量关系比较复杂，难于获得精确的模型，常使得过程系统的模拟和优化有较大误差。本文提出基于模糊逻辑表述和处理系统变量间的不精确近似关系，使模型方程间的冲突和不协调性趋于最小，模糊目标函数趋于最大。从而实现对模糊系统的模拟和优化。     

Sensitivity analysis of mathematical models for final product properties: Link to DTG curve

Compressive strength and water absorption of fired heavy clay products varies with firing temperatures, but not entirely according to linear function, as it is mostly reported in literature. Also, differential thermo-gravimetric curve shows many turnovers in all the samples tested, within observed temperature range (820–920 °C). The aim of this research was to find a cause for such behaviour. Except derivative weight (DW), compressive strength (CS) and water absorption (WA) are chosen as outputs that represent properties of the fired samples. These parameters can be calculated using second order polynomial models (SOPs), on the basis of content of major oxides and firing temperature, as shown in our previous research. Sensitivity analysis was used as the effective approach in testing changes observed in the SOP outputs, due to the variation of content of major oxides for +1% or −1% of their nominal value. This study reveals in more detail the most significant influence of inputs (SiO₂, Al₂O₃, Fe₂O₃ and CaO content) over the outputs (DW, CS and WA) in every observed firing temperature. Addition or lowering of content of major oxides can both increase and decrease all the observed outputs, as revealed using sensitivity analysis.     

Fuzzy Inference System for Modeling of Zinc Removal Using Micellar-Enhanced Ultrafiltration

Discrete event computer simulation is one of the most widely used modeling tools for production systems. The major objective of this study is to develop a fuzzy rule-based model for the evaluation of micellar-enhanced ultrafiltration (MEUF) performance. In the current work, the foldover fractional factorial designs were applied as a screening experiment to determine all the influential factors affect Zn²⁺ rejection and permeate flux response. According to analysis of the variance (ANOVA) a three-screened significant factors, three-level full factorial designs (3 ^k ) was applied. Finally, a fuzzy model has been developed to predict and calculate the output variables. These mathematical models are found to be reliable predictive tools with an excellent accuracy with AARE ±1.08%, ±3.75%, in comparison with experimental values for permeate flux and rejection, respectively. It was observed that there is acceptable agreement between and fuzzy model results with experimental data.     

分解炉内流动特性数值模型的探讨

分解炉是预分解窑技术的关键设备，具有燃料燃烧、气固传热、碳酸盐分解等功能。为充分了解分解炉的性能，应用适宜的模型来模拟分解炉内部三维流场是很有意义的。在借鉴分解炉物理模型和流体力学的湍流模型的基础上，对华新水泥厂采用的喷腾式和旋喷式分解炉进行了分析，提出两种数学模型，为优化分解炉结构设计提供了理论依据。     

厌氧内循环反应器内循环量与产气率数学模型构建

厌氧内循环反应器(IC)的技术核心是利用反应器内所产沼气形成的气提作用实现无附加外动力的内循环,达到改善反应器内部水力条件、强化过程传质的目的,从而保障反应器的高效运行。研究了反应器内循环量与沼气产率之间的关系,通过研究发现:在进水COD的质量浓度为7135～9980mg/L,反应器有效容积负荷为21.4～40g/(L·d)条件下,运用灰色系统建模理论建立了内循环量与沼气产率之间典型二元参数间数学模型,该模型可为反应器的自动控制运行打下基础。     

Applicability analysis of mathematical models for the combustion characteristics in the pool fire

A pool fire characterized by high temperature and heat radiation, is a common accident in chemical industry. The important combustion characteristic parameters are the heat radiation flux, the burning rate, the flame height, etc., but the most significant one is the heat radiation flux. The calculation model of the pool fire has an important role to assess the accident. There are three types of widely used pool fire models, the Shokri and Beyler model, the Mudan model, and the point source model. The models are used to calculate the combustion parameters of three different kinds of oils in tanks of different scales. The predictions of three models are compared with the simulation results. The analysis shows that the point source model has a large error for pool fires with the diameter greater than 10 m and the thermal radiation flux smaller than 5 kW/m², and the model is more applicable to heavy crude pool fires. The scope of application of the Mudan model is broader, and this model ensures higher accuracy if the thermal radiation flux is smaller than 5 kW/m². The Shokri and Beyler model is more suitable for the case where the pool fire diameter is greater than 40 m and the thermal radiation flux is above 5 kW/m², and the results for the light crude pool fire based on this model are more reasonable.