透水事故的处理 |
作者:一万年太久 日期:2011-1-15 11:04:00 |
透水预兆 井下采掘工作面发生透水之前,一般都有某些征兆。这是从每次透水事故教训中得出的正确结论。因此,在采掘工作面或其它地点发现有透水预兆时,必须停止作业,采取措施,并报告矿井调度室。如果情况危急,必须立即发出警报,撤出所有受水威胁地点的人员。 预兆特点 1、挂红 因矿井水中含有铁的氧化物,所以在通过煤层或岩层裂隙时,附着在裂隙表面有暗红色水锈。 2、挂汗 当采掘工作面接近积水区时,水在自身压力作用下,通过煤岩裂缝而在煤壁、岩壁上聚成许多水珠,但有时空气中的水分遇到低温煤块也会凝结成水珠,这是一种假象。因此,在遇到挂汗时,要注意辩别真伪,其方法是观察煤岩的新鲜面是否也有潮气,如果煤岩潮湿则是透水征兆。 3、空气变冷 工作面接近大量积水时,气温骤然降低,煤壁发凉,人一进去有凉爽感,时间越长就越感到阴凉。但是受地热影响较大的矿井,地下水温度偏高,当采掘工作面接近时,温度反而升高。 4、发生雾气 当巷道内温度很高时,积水渗到煤壁后,引起蒸发而迅速形成雾气。 遇到以上几种情况,必须立即停止掘进,加固支架,进行探放水。 5、水叫 井下的高压积水,向煤岩裂缝强烈挤压与两壁摩擦而发出嘶嘶叫声,说明采掘工作面距积水区已很接近,若是煤巷掘进,透水即将发生,这时必须立即发出警报,撤出所有受水威胁的人员。 6、底板鼓起 发生底板鼓起有两种原因,一种是底板受承压含水层水(或积水区)静水压力和矿山压力共同作用的结果,这种情况属于透水预兆;另一种是受矿山压力单方面的作用而产生底鼓,这种情况一般不突水。因而巷道发生底鼓时,一方面派人监视底鼓的发展变化,一方面报告矿井调度室,及时确定发生底鼓的原因。如果证实是由水压造成的,应迅速采取处理措施。 发生底板鼓起有两种原因,一种是底板受承压含水层水(或积水区)静水压力和矿山压力共同作用的结果,这种情况属于透水预兆;另一种是受矿山压力单方面的作用而产生底鼓,这种情况一般不突水。因而巷道发生底鼓时,一方面派人监视底鼓的发展变化,一方面报告矿井调度室,及时确定发生底鼓的原因。如果证实是由水压造成的,应迅速采取处理措施。 |
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