發(fā)布時間：2018-01-29 20:50

  本文關(guān)鍵詞： 通風(fēng)系統(tǒng) 降阻優(yōu)化 角聯(lián)分支 最佳風(fēng)阻 綜合評價　出處：《湖南科技大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：礦井通風(fēng)系統(tǒng)是礦井生產(chǎn)系統(tǒng)中重要組成部分之一，對于礦井能否正常、安全生產(chǎn)有著非常重要的意義。無論是礦井通風(fēng)系統(tǒng)優(yōu)化設(shè)計還是礦井通風(fēng)技術(shù)日常管理，都要盡力降低礦井通風(fēng)阻力、提高有效風(fēng)量率，達到減小通風(fēng)費用和提高系統(tǒng)穩(wěn)定性的目的。目前國內(nèi)外礦山相繼進入深部資源開采和采用機械化開采，深部地溫升高和設(shè)備散熱增大，礦井熱害突出，致使礦井需風(fēng)量增大；同時通風(fēng)線路增長、巷道變形加大，通風(fēng)阻力增大，致使礦井實際供風(fēng)量減小，礦井通風(fēng)系統(tǒng)能力嚴重制約礦井生產(chǎn)能力的提升，因此對礦井通風(fēng)系統(tǒng)進行降阻優(yōu)化研究尤顯重要和迫切。 本文采用理論分析、數(shù)值模擬、網(wǎng)絡(luò)解算、現(xiàn)場實測及工程實踐等研究手段，對礦井通風(fēng)系統(tǒng)降阻優(yōu)化進行了深入研究，主要研究內(nèi)容及結(jié)論如下： 分析了礦井通風(fēng)系統(tǒng)影響因素及穩(wěn)定性、降阻技術(shù)與方法，得到了相關(guān)影響因素、兩翼對角排風(fēng)網(wǎng)和三角形排風(fēng)網(wǎng)系統(tǒng)穩(wěn)定性定量分析公式、礦井通風(fēng)系統(tǒng)降阻技術(shù)與方法主要有：調(diào)整網(wǎng)絡(luò)結(jié)構(gòu)、增加并聯(lián)巷道、刷大巷道斷面積、調(diào)節(jié)風(fēng)機工況點（變頻控制）及增減風(fēng)機等。 探討了通風(fēng)網(wǎng)絡(luò)等效變換，提出了等效變換求解方法—風(fēng)壓源效應(yīng)疊加準則，推導(dǎo)了三角形—星形等效變換公式，系統(tǒng)分析了角聯(lián)網(wǎng)絡(luò)風(fēng)阻特性，，得到了角聯(lián)網(wǎng)絡(luò)總風(fēng)阻隨角聯(lián)分支風(fēng)阻的增大依次存在一個遞減區(qū)間和遞增區(qū)間、角聯(lián)分支可有效降低角聯(lián)網(wǎng)絡(luò)總風(fēng)阻、角聯(lián)分支存在最佳風(fēng)阻及通過改變礦井主要角聯(lián)分支風(fēng)阻可降低礦井總風(fēng)阻等結(jié)論及角聯(lián)網(wǎng)絡(luò)風(fēng)阻特性智能測試系統(tǒng)方案。 全面測定了周源山煤礦目前通風(fēng)系統(tǒng)及其啟用主要角聯(lián)分支時通風(fēng)系統(tǒng)2種狀態(tài)下通風(fēng)參數(shù)，掌握了礦井通風(fēng)現(xiàn)狀，驗證了角聯(lián)分支的存在可有效降低角聯(lián)網(wǎng)絡(luò)總風(fēng)阻等結(jié)論。針對周源山煤礦通風(fēng)系統(tǒng)，提出了4種可行降阻優(yōu)化方案，對各種方案進行了通風(fēng)參數(shù)網(wǎng)絡(luò)解算及綜合評價，論證了通過改變礦井主要角聯(lián)分支風(fēng)阻降低礦井總風(fēng)阻這一降阻方法的可行性，并以最佳方案指導(dǎo)礦井通風(fēng)系統(tǒng)降阻工程實踐。
[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.
【學(xué)位授予單位】：湖南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD724

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本文編號：1474333