煤矿排水系统可靠与否事关重大，它直接关系到煤矿的人身、财产安全。
The coal mine drainage system reliable or not is extraordinary important, it relates directly to the coal mine person, the property safety.
简要探讨了高压水射流清洗技术在煤矿主排水管道清洗中的应用。
In this paper the application of high pressure water jet technology in coal mine main drainage pipeline is discussed briefly.
最后通过对具体实例的计算，说明了清洗煤矿主排水管道具有显著的经济效益。
Through calculation of concrete instance, it is clear that coal mine main drainage pipeline cleaning by high pressure water jet has remarkable economic benefits.
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