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.
大孔径直排孔的作用是加强矿井排水能力，保证煤矿安全生产。
The large diameter direct drainage borehole is used to strengthening mine drainage capacity, to ensure coalmine safety production.
矿坑排水、煤矸石淋滤水及地下水中的多环芳烃与煤层及煤矸石的淋滤有关，煤矿开采引起的多环芳烃污染应引起重视。
Leaching from coal and coal waste stone can increase PAHs concentration in mine drainage and groundwater. Pollution of PAHs by coal mining should be attached more importance.
煤矿开采过程中的矿坑排水对地下水流场和地下水资源利用具有强烈影响。
The drainage in a coal mine under exploitation may give a strong impact on the underground water flow regime, causing negative influence on the development of the groundwater resources.
对气浮法处理煤矿井下排水进行了试验研究。
The experiments of mine wastewater of air floatation are presented.
实际应用表明，该系统提高了煤矿井下排水的安全性和可靠性。
The actual application showed that the system improves safety and reliability of underground drainage.
排水体系是煤矿出产的重要环节，排抽水机属煤矿大型固定装备，独立性强，备用系数大。
Drain the system is the important link that the coal mine produce, draining the pump to belong to the coal mine large fix the equipments, the independence is strong, the back up coefficient is big.
在煤矿井下的排水系统中，需要多台排水泵协调地工作。
Mechanics research on chief draining pump cavitation damage in coal mine;
在煤矿井下的排水系统中，需要多台排水泵协调地工作。
Mechanics research on chief draining pump cavitation damage in coal mine;
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