王凯, 裴晓东, 杨涛, 陈瑞鼎, 郝海清, 蒋曙光, 孙勇. 矿井智能通风联动调控理论与供需匹配实验研究[J]. 工程科学学报, 2023, 45(7): 1214-1224. DOI: 10.13374/j.issn2095-9389.2022.05.05.003
引用本文: 王凯, 裴晓东, 杨涛, 陈瑞鼎, 郝海清, 蒋曙光, 孙勇. 矿井智能通风联动调控理论与供需匹配实验研究[J]. 工程科学学报, 2023, 45(7): 1214-1224. DOI: 10.13374/j.issn2095-9389.2022.05.05.003
WANG Kai, PEI Xiao-dong, YANG Tao, CHEN Rui-ding, HAO Hai-qing, JIANG Shu-guang, SUN Yong. Study on intelligent ventilation linkage control theory and supply–demand matching experiment in mines[J]. Chinese Journal of Engineering, 2023, 45(7): 1214-1224. DOI: 10.13374/j.issn2095-9389.2022.05.05.003
Citation: WANG Kai, PEI Xiao-dong, YANG Tao, CHEN Rui-ding, HAO Hai-qing, JIANG Shu-guang, SUN Yong. Study on intelligent ventilation linkage control theory and supply–demand matching experiment in mines[J]. Chinese Journal of Engineering, 2023, 45(7): 1214-1224. DOI: 10.13374/j.issn2095-9389.2022.05.05.003

矿井智能通风联动调控理论与供需匹配实验研究

Study on intelligent ventilation linkage control theory and supply–demand matching experiment in mines

  • 摘要: 鉴于矿井通风系统动态匹配自动化调节的现场需求,分析了风量供需匹配原理与联动调控方法,建立了多元特征融合的主通风机调频、关联分支调阻及联合调节的数学模型。提出了通风网络分支供需匹配调控模型和稳定性判定方法,基于有毒有害气体涌出(排放)预测的需风模型,开发了矿井通风供需偏离的智能化应急调控软件。实现了通风供需失衡选择变频调节时,自动计算通风机最佳工作频率;选择关联分支风阻调节时,运用元胞自动机模型计算出最佳调节巷道,并通过风网反演计算模型获取调节风阻值;当单一调节方式失效时,生成风机变频与分支调阻联合调控方案;通过风网超前模拟分析实现风量供需匹配的可靠调节。运用典型矿井通风系统建立了风网分支需风量自动化调节实验模型,以现场有毒有害气体超限统计规律为分支需风量调控导向模型开展调风稀释实验,结果表明:三种调节方式下分支风量严格按照调控理论模型变化,调风过程中CO2浓度变化延时明显,风机变频调节的风网波动较小,分支风阻调节对局部风网影响大,联合调节风网波动性大。实验验证了矿井通风供需匹配智能化调控系统的实用性和可行性,为矿井通风联动调控提供理论和应用指导。

     

    Abstract: To determine the dynamic matching of a mine ventilation system to onsite demands of automatic adjustment, we analyze the principle of air volume supply and demand matching and a linkage control method. Subsequently, we establish a mathematical model of main ventilator frequency adjustment, associate branch resistance adjustment, and joint adjustment with multi-feature fusion. We also propose a matching regulation model and a stability determination method for a ventilation network’s branch supply and demand. Based on the monitoring of harmful gases, intelligent emergency control software is developed by a mine ventilation supply and demand model. We realize the automatic calculation of the best working frequency of a ventilator when an unbalanced supply and ventilation demand is selected for frequency conversion adjustment. When selecting the associated branch wind resistance adjustment, we use a cellular automata model to calculate the optimal adjustment roadway. We obtain the adjusted wind resistance value using a winding network inversion calculation model. When a single adjustment method fails, a joint control scheme of fan frequency conversion and branch resistance adjustment is generated. A reliable adjustment of air volume supply and demand matching is realized through an advanced simulation analysis of the air network. A typical mine ventilation system is used to establish an experimental model for the automatic adjustment of the air demand of a branch of a winding network. The air demand adjustment and dilution experiment are carried out with the statistical law of onsite gas overrun as the guidance model of branch air demand control. The following results are obtained. The branch air volume changes according to the adjustment theory model under three adjustment methods. Further, the CO2 concentration change is evidently delayed in the air adjustment process. In the process of fan frequency conversion regulation, the air volume of each branch of the air network changes according to the ventilation network sensitivity, and the fluctuation of the air network is minimal. When a single associated branch resistance adjustment method is used to regulate the wind, the local wind network has great influence on air volume and thus fluctuates greatly. When the fan frequency and associated branch wind resistance are combined, the fluctuation of the branch air volume of the entire air network is the largest, and the system stability and security are the lowest. Therefore, the fan frequency and combined regulation methods of multiple associated branches are recommended to use in practical applications of mines. The experiment verified the practicability and feasibility of the deviation of mine ventilation supply and demand from intelligent control systems. It also provided theoretical and application guidance for mine ventilation linkage control.

     

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