矿井通风系统降阻优化研究

发布时间：2018-01-29 20:50

本文关键词： 通风系统降阻优化角联分支最佳风阻综合评价　出处：《湖南科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：矿井通风系统是矿井生产系统中重要组成部分之一，对于矿井能否正常、安全生产有着非常重要的意义。无论是矿井通风系统优化设计还是矿井通风技术日常管理，都要尽力降低矿井通风阻力、提高有效风量率，达到减小通风费用和提高系统稳定性的目的。目前国内外矿山相继进入深部资源开采和采用机械化开采，深部地温升高和设备散热增大，矿井热害突出，致使矿井需风量增大；同时通风线路增长、巷道变形加大，通风阻力增大，致使矿井实际供风量减小，矿井通风系统能力严重制约矿井生产能力的提升，因此对矿井通风系统进行降阻优化研究尤显重要和迫切。本文采用理论分析、数值模拟、网络解算、现场实测及工程实践等研究手段，对矿井通风系统降阻优化进行了深入研究，主要研究内容及结论如下：分析了矿井通风系统影响因素及稳定性、降阻技术与方法，得到了相关影响因素、两翼对角排风网和三角形排风网系统稳定性定量分析公式、矿井通风系统降阻技术与方法主要有：调整网络结构、增加并联巷道、刷大巷道断面积、调节风机工况点（变频控制）及增减风机等。探讨了通风网络等效变换，提出了等效变换求解方法—风压源效应叠加准则，推导了三角形—星形等效变换公式，系统分析了角联网络风阻特性，，得到了角联网络总风阻随角联分支风阻的增大依次存在一个递减区间和递增区间、角联分支可有效降低角联网络总风阻、角联分支存在最佳风阻及通过改变矿井主要角联分支风阻可降低矿井总风阻等结论及角联网络风阻特性智能测试系统方案。全面测定了周源山煤矿目前通风系统及其启用主要角联分支时通风系统2种状态下通风参数，掌握了矿井通风现状，验证了角联分支的存在可有效降低角联网络总风阻等结论。针对周源山煤矿通风系统，提出了4种可行降阻优化方案，对各种方案进行了通风参数网络解算及综合评价，论证了通过改变矿井主要角联分支风阻降低矿井总风阻这一降阻方法的可行性，并以最佳方案指导矿井通风系统降阻工程实践。
[Abstract]:Mine ventilation system is one of the important parts of mine production system. Safety production is of great significance. Both the optimization design of mine ventilation system and the daily management of mine ventilation technology should try to reduce mine ventilation resistance and improve the effective air rate. To reduce the ventilation cost and improve the stability of the system. At present, domestic and foreign mines have entered deep resources mining and mechanized mining, the deep ground temperature and equipment heat dissipation increase, the mine thermal damage is prominent. Increase mine air demand; At the same time, the increase of ventilation lines, roadway deformation, ventilation resistance increase, resulting in the actual mine air supply reduced, mine ventilation system capacity seriously restricted the mine productivity. Therefore, it is very important and urgent to study the resistance reduction optimization of mine ventilation system. In this paper, theoretical analysis, numerical simulation, network calculation, field measurement and engineering practice are used to study the optimization of mine ventilation system resistance reduction. The main research contents and conclusions are as follows: The influencing factors and stability of mine ventilation system, the technique and method of reducing resistance are analyzed, and the quantitative analysis formulas of stability of two-wing diagonal ventilation net and triangular ventilation net are obtained. The main techniques and methods of reducing resistance in mine ventilation system include adjusting the network structure, increasing the parallel roadway, brushing the broken area of the roadway, regulating the operating point of the fan (frequency conversion control), increasing and decreasing the fan and so on. In this paper, the equivalent transformation of ventilation network is discussed, and the equivalent transformation method, the superposition criterion of wind pressure source effect, is put forward, the triangular star equivalent transformation formula is derived, and the wind resistance characteristics of the angle-connected network are analyzed systematically. It is concluded that the total wind resistance of the angular network decreases and increases with the increase of the wind resistance of the angular branch, and the angular branch can effectively reduce the total wind resistance of the angular network. The conclusion is that there is the best air resistance in the angle joint branch and the total wind resistance can be reduced by changing the air resistance of the main angle joint branch in the mine and the intelligent test system scheme for the wind resistance characteristics of the angle connection network is also presented. The ventilation parameters of the ventilation system in Zhouyuanshan Coal Mine and the ventilation system in two states when the main angle joint branches are used are comprehensively measured, and the present situation of mine ventilation is mastered. It is verified that the existence of angular branch can effectively reduce the total wind resistance of the network. For the ventilation system of Zhouyuanshan coal mine, four feasible optimization schemes for reducing resistance are put forward. The ventilation parameter network solution and comprehensive evaluation of various schemes are carried out, and the feasibility of reducing the total air resistance by changing the air resistance of the main angle joint branch of the mine is demonstrated. And the best scheme to guide the mine ventilation system resistance reduction engineering practice.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD724

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