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可控循环风是将回风流中的部分风流,又引导到其进风流中,再次经过工作面反复循环地被使用,籍以增加工作面的有效风量,改善工作面的气候条件和净化风流。理论分析的结果是:有控制地使风流循环,瓦斯浓度不会无限制地升高或聚积。在循环系统中,当风流达到稳定状态以后,循环区末端瓦斯浓度的大小,与循环风量的大小无关,只决定于区域内的瓦斯涌出量和系统的进风量,而且与该系统进风量情况下的常规通风时的瓦斯浓度相等。为验证理论分析结果,《蒲白马村矿可控循环风的试验研究》课题组在蒲白矿务局矿
Controllable circulating wind is the part of the return air flow Merry, and guide it into the air flow, once again through the work surface repeatedly used, membership to increase the effective air flow on the work surface to improve the work surface climatic conditions and purify the Merry. The result of theoretical analysis is that the circulation of the air circulation is controlled in a controlled manner, and the gas concentration will not increase or accumulate indefinitely. In the circulation system, after the wind reaches a steady state, the gas concentration at the end of the circulation zone is not related to the circulating air volume but only to the gas emission in the area and the air intake of the system. In addition, Under conventional ventilation the gas concentrations are equal. To verify the theoretical analysis results, “Pu Baimacun experimental controllable circulation of wind” group at the Pu Bai Mine Bureau Mine