通过分析近距离保护层开采、水力掏槽法及边抽边掘技术防治煤与瓦斯突出原理及实践应用，从而有利于煤与瓦斯突出矿井选择合理有效的防突技术。
The paper researchs the principle of protective seam mining, hydraulic slotting method and executing-digging technology to avoid risk of coal-gas outburst, and its practices in coal mine.
通过分析研究，力求达到解决企业现实问题和提高自己实践与研究能力的目的。
Through the analysis research, we make effort to achieve the solution enterprise realistic question and enhances practices and the research ability goal.
通过分析与应用总结出适用于大型火力发电厂热力控制系统的设计、调整方法、手段，并在工程应用中得到实践。
Through analyzing and application, the design and tuning methods of big capacity fire power plant thermal control system are concluding.
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