1·This paper introduces a method to solve optimum length of working face by Fuzzy Programming and Value Engineering Theory. Then an example with its analysis was given.
本文介绍了用模糊规划及价值工程理论求解最佳工作面长度的方法，并给出了算例，进行了结果分析。
2·The micro fractures are firstly formed in roof above the working face.
研究表明：工作面上方采空区靠顶板侧岩层首先产生微裂隙。
3·The author briefly introduces the principle, working face testing and application, effectiveness analysis and Suggestions on outburst control for high pressure grinding water jet technology.
作者简要介绍高压磨料水射流技术防突原理、工作面试验应用、效果分析及建议。
4·We can conclude that the method that unites lower-sect coal stack method and mobile drainage method is an effective measure in the control of gas in the working face of high gas mine.
由此得出，降段煤垛与移动抽放相结合的方法是高瓦斯矿井回采工作面瓦斯治理的有效方法。
5·The floor roadway should be located out of the abutment stress zone when protection coal pillar is retained, or the working face should be pushed away for enough distance under overhead mining.
留设保护煤柱时，底板岩巷应位于集中应力区的外侧或跨采时工作面应推过足够距离，使巷道靠近采空区应力恢复区的下方。