受控循环通风技术可以应用于低瓦斯煤矿,而非煤具有低瓦斯或无瓦斯的特性,为该项技术的广泛应用提供了有利条件,只要能对循环风中的粉尘进行有效净化,就可以充分发挥其系统优越性.在应用该项技术的过程中,通常考虑循环工作面污染物为连续产生,循环通风系统中有净化器情况下的降尘措施,如凿岩、连续放矿、连续出矿.通过研究循环系统内粉尘粒径与高压喷雾粒径间的匹配关系,提出喷嘴迎风向下45°、喷嘴直径1.0mm、喷水水压7.5 MPa、喷嘴间距0.5m的布置形式,可以使粒径为10μm以下的粉尘降尘率达到90％,这可以满足循环风的降尘要求.%Controlled recirculation ventilation technology can be widely used in low-content gas coal mines, and non-coal mines have the characteristic of low-content gas or no gas, which provide anvantages for the widely use of this technology. As long as dust at circulated air is effectively purified, superiority of this technology will be fully brought into play. In u-sing this technology, it is usually considered that pollutants at recirculation working face is generated continuously and purifier is used to reduce dust at such processes as rock drilling, continuous oredrawing and continuous removal in recirculation ventilation system. After researching on the matching relationship between dust size in recirculation system and particle size of high-pressure spray, the layout form with spray head laying against the wind of 45°down, the diameter of spray head of 1. 0 mm, the hydraulic pressure of spraying water of 7. 5 MPa, and the interval distance of spray head 0. 5m can reduce the dust with particle size of 10μm by 90% , which can meet the dust reduction requirements of circulation system.
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