共查询到20条相似文献,搜索用时 828 毫秒
1.
矿井通风系统的优化及其模糊性 总被引:6,自引:1,他引:5
本文探讨了矿井通风系统优化设计的目标和手段,提出将矿井通风系统的优化设计问题分为两大类,即网络优化和方案优化。通过对这两类问题的讨论,提出并论述了矿井通风系统的模糊最优化问题。 相似文献
2.
3.
4.
本文分析了兖州驿镇煤矿井下通风系统问题,利用计算机仿真技术中的网络解算对该矿通风系统进行优化对比计算,解算结果符合矿井生产的通风需求。该技术的应用提高了煤矿企业的现代化进程,为今后的通风方案优化分析奠定了理论基础。 相似文献
5.
矿井通风系统模糊优化研究 总被引:16,自引:1,他引:15
矿井通风系统优化是一个多目标、多层次的模糊综合评价问题.为此提出了一种新的计算方法:按目标分层,用分层模糊优选理论对矿井通风系统设计方案进行优选,分层时允许评价指标重叠,从而便于确定目标与评价指标的权重.将此模型及算法应用于实际矿井通风系统设计方案的优选,获得了较满意的结果. 相似文献
6.
7.
矿井通风系统的有效运行受众多因素的影响,因而矿井通风系统方案的优选也受到众多定量和定性因素的限制。在方案优选时,突变理论相对于其他方法具有计算简单、客观性和实用性强等优点。在调查和分析我国较多金属矿井通风系统存在矿井风流分配不合理、有效风量率低和通风网络设计欠妥等共性问题的基础上,针对某大型复杂矿井通风系统,并基于技术经济可行、安全高效等考虑提出优化矿井通风网络、通风动力和风流调控设施等方面的多个技术方案。利用通风网络解算结果,并选取合适的评价指标,应用突变理论对矿井通风系统方案进行优选,确定最终矿井通风系统优化方案。 相似文献
8.
9.
10.
通过矿井通风系统和局部通风系统构成进行分析研究,提出采取优化通风网络、降低巷道通风摩擦阻力系数等措施来优化矿井井下通风系统,为矿井安全高效生产提高了通风保障。 相似文献
11.
The main objective of mine ventilation network optimization studies is to develop a reasonable method for ventilation system control that minimizes the total cost of mine ventilation. The fundamental principles for ventilation network optimization are discussed, and a multi-objective optimization model is established from the viewpoint of total cost. Furthermore, an optimization algorithm based on the airflow asymptotic calculation is presented by the hierarchical analysis of objective functions and analysis of the structure characteristics of a ventilation network. In the proposed approach, the regulated branches are determined by the directed path matrix; the optimal solution is obtained by airflow asymptotic calculation using the existing software for ventilation network analysis, and it does not need to solve the large-scale nonlinear programming problem. The results of example analysis validated the reliability of this approach. 相似文献
12.
13.
矿井自然风压作为矿井通风动力的重要组成部分,与通风系统和通风网络密切相关,随着煤矿产量和开采深度的增加,矿井自然风压对通风系统的作用会越来越大。为了快捷预测、计算和分析矿井自然风压及其对通风系统的影响,运用流体静力学、热力学,结合通风网络解算算法,得出了矿井自然风压实时计算算法。结合晋煤集团长平煤矿实际矿井,得出了不同温度、压强条件下,含有自然风压的实时通风网络解算结果。实例表明:该算法能够进行含自然风压通风网络的自动解算,能够快捷、实时计算得出含自然风压实时通风网络解算的结果,为确保通风系统稳定可靠运行提供技术支持。 相似文献
14.
矿井通风是煤矿生产的一个重要环节,是煤矿安全的基础。随采矿技术的发展及生产能力的扩大,须改造优化矿井通风系统,使其能与矿井发展需要相匹配。通过对新疆龟兹矿业西井基本现状分析,实地测得相关参数,应用三维建模建立了智能分析系统。并基于CFD计算模型对矿井通风风硐风阻进行模拟、利用VentAnaly软件对矿井通风系统进行仿真模拟,研究了风硐阻力对地面主通风机效率影响等内容,对通风系统进行了优化设计。研究得出:对龟兹西井通风系统全面普查,获得了矿井通风基础数据;通风对西井风硐模拟,得到回风斜井风硐主要通风阻力为局部阻力损失;根据矿井开采后期布置以及需风量、阻力分析,选用型号为FBCDZNo.20/2×200的主要通风机。 相似文献
15.
16.
17.
刘泽功 《煤炭学报(英文版)》2001,7(1):64-69
The solutions widely used at present for calculating complicated mine ventilation networks are ones in which resistance of the branches and characteristic parameters of the fans are taken as basic input data. But it is time-and-energy-consuming to obtain the branch resistance values. A new solution is developed in this paper in which the branch resistance values are obtained through measuring and evaluating the airflow of the whole ventilation network. Theoretical analysis is made of the establishment of a linear equation series with branch resistance as unknown numbers, an equation series for which one, and only one, result of solutions exists. This solution is programmed in C language and passed on a personal computer. The programmed solution programmed proves of practical use, as demonstrated by specific examples. Being different from other solutions, the method takes the branch airflow and fan working points as basic input data, and the present solution is of greater advantage for calculating ventilation networks of mines in operation. 相似文献
18.
《国际露天开采、回填与环境杂志》2013,27(3):201-212
This work presents a new method of mine ventilation network optimisation as standard non-linear programming problem and discusses the use of a novel first-order Lagrangian (FOL) algorithm for equality constraints as a solution tool for these problems. Slack variables have been defined to transform such inequality constraints into their corresponding equality forms. The problem is then converted to non-linear problem with equality constrains. The methodology adopted in this paper is capable of dealing with the non-linear convex model with significant savings on computational efforts due to its use of only first derivatives. A MATLAB programme has been developed based on the FOL method to solve a generalised mine ventilation network optimisation problem. To study the validity and the viability of the FOL programme, the programme has been applied to already published network problems and both results are identical. 相似文献
19.
为了保证煤矿井下正常生产,需要一个合理可靠的矿井通风系统。当矿井开采到一定深度,围岩温度逐渐上升,此时对通风系统进行网络解算必须考虑风流与围岩之间的热交换问题。测试了某千米矿井通风系统的负压,在通风系统网络解算中引入节点风流热量平衡方程,分析了热交换问题对通风系统网络解算的影响;对比了忽略热交换和考虑热交换影响的2种通风系统网络解算结果的分支风量偏差。对不同的矿井总风量进行网络解算,分析了热交换对风量分配的影响程度,得出了随着矿井总风量减小,热交换对通风网络解算结果的影响变大的结论。在实例中验证了考虑热交换的通风网络解算的准确性,达到了井下特定地点风量准确计算的目的。 相似文献