Experimental study on decrease of gas gush strength led by active water
-
摘要: 为了解决采掘工作面瓦斯超限问题，根据采掘工作面落煤中的瓦斯压力和暴露时间关系，在实验室采用甲烷吸附-解吸装置进行了颗粒煤的前置浸入与后置浸入活性水与纯水2种状态下的瓦斯吸附-解吸对比试验，并在某煤矿井下3个掘进工作面落煤中进行了喷洒活性水与纯水的瓦斯解吸对比试验。结果表明，活性水对颗粒煤前置浸入与后置浸入均具有相同的抑制瓦斯解吸作用；在掘进工作面落煤中喷洒活性水，其瓦斯解吸量相比纯水可降低53.56%～54.76%，初期最大瓦斯涌出速度可降低54.42%～71.29%；在低水压、大流量条件下注入或喷洒活性水比纯水更有利于延缓和降低瓦斯涌出。Abstract: To solve gas overload problem in mining face, the relationship between gas pressure and exposure time in falling coal of mining face was analyzed. A series of methane absorption-degradation comparison experiments on immersed coal particles praevia and rear in active water and pure water were carried out by use of a methane absorption-degradation equipment in laboratory. Follow on, comparison experiments on methane desorption by spraying active water and pure water were carried out in falling coal of three driving faces in a coal mine. In conclusion, active water has the same gas desorption effect on both praevia and rear immersed coal particles. By spraying active water solution in falling coal of driving face, the methane desorption degree can be reduced 53.56%-54.76% than that of pure water. And the maximum gas inrush velocity in the beginning decreases 54.42%-71.29% than that of pure water. It is found that injecting or spraying active water under low pressure and high flow conditions is even conducive to postpone gas gush and decrease gush strength.
-
计量
- 文章访问数: 27
- HTML全文浏览量: 7
- PDF下载量: 9
下载:
