Abstract During coal mine production, the unbalanced emission of stope gas and other toxic and harmful gases can easily lead to major disasters and accidents. In view of the structural characteristics of coal mine excavation ventilation system, a three-dimensional ventilation network (VN) experimental model with an independent stope is constructed and regulated fan frequency conversion (FC) is developed. The concept of influenced degree is proposed, and it is quantified for the stope branch in a complex VN model. An experiment is conducted on FC and air-regulating dilution of quantitative gas release. It is concluded that the gas concentration in the stope of a working face has a power function relationship with the working frequency of the fan. According to mining replacement characteristics, five wind regulation rules for supply and demand matching (SDM) were set during a working day, and the feasibility of dynamic treatment and control adjustment of the gas emission at the mining surface was verified experimentally. Finally, the dynamic SDM control model of stope ventilation has been applied in a mine operated by the Yangquan coal mine. The results show that the stope gas disaster risk can be dispensed quickly and effectively when the emission is unbalanced.

中文翻译：

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通风供需匹配分配煤矿采场瓦斯灾害风险试验研究

摘要 在煤矿生产过程中，采场瓦斯等有毒有害气体的不平衡排放极易引发重大灾害和事故。针对煤矿开挖通风系统的结构特点，构建了具有独立采场的三维通风网络（VN）实验模型，并开发了可调风机变频（FC）。提出了影响程度的概念，并在复杂的VN模型中对采场分支进行了量化。进行了定量气体释放的FC和空气调节稀释的实验。得出工作面采场瓦斯浓度与风机工作频率呈幂函数关系。根据矿山接替特征，在一个工作日内设置了5条供需匹配（SDM）风调节规则，实验验证了矿面瓦斯排放动态处理和控制调整的可行性。最后，将采场通风的动态SDM控制模型应用于阳泉煤矿运营的矿井。结果表明，当排放不平衡时，采场瓦斯灾害风险可以得到快速有效的分配。