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云锡各矿,为了消除放射性氡及其子体危害,降低各矿岩表面氡的析出,开展了对井巷壁喷涂混凝土防氡复盖层的工作,一般可降低矿岩表面氡析出率77.65—94.58％,取得了较好的效果。密闭墙是对矿山井下采空区和废旧巷道进行防氡密闭的重要措施,云锡各矿山设置了数以万(个)计的密闭墙。为了检验其密闭效果特设计了一种新的测试方法。经现场使用,简便、易行、可靠,并对各种不同的密闭墙进行了气密性压差值的测定。发现以往建筑的各种密闭墙漏风量大,后来采取措施,对单砖密闭墙采用水泥砂浆粉面降低漏风量99％,取得了密闭的良好效果。
In order to eliminate the danger of radioactive radon and its daughters and reduce the precipitation of radon on the surface of each ore, the various mines of Yunxi have carried out the work of spraying the concrete radon protective cover on the wall of mine shaft so as to reduce the radon exhalation rate on the ore rock surface in general. 77.65 -94.58%, and achieved good results. Sealed walls are important measures to prevent limestone mined-out area and waste roadway from being confined to mine. There are tens of thousands of sealed walls in each mine of Yunxi. In order to test the hermetic effect, a new test method has been designed. The field use, simple, easy, reliable, and a variety of confined walls were air tightness differential pressure measurement. Found in the past, a variety of confined walls of the building air leakage, and later to take measures to single brick wall with cement mortar noodles to reduce air leakage 99%, and achieved airtight good results.