The major design principle and theoretical optimal length mechanized mining face has important practical significance to coal mine safe production. In the optimization design of Jinzhuang mine 3207 fully mechanized working face, the efficient recovery, disaster management and other factors are fully considered to accurately and reasonably determine the length of the working face, which creates good production conditions for the safe and smooth recovery in the future.%综采工作面长度主要设计原则及理论最佳长度的确定，对矿井能否安全生产有着重要的现实意义。金庄矿3207综放工作面长度优化设计时，从高效回采和灾害治理各方面综合分析，准确合理确定了工作面长度，为以后安全顺利回采创造了良好的生产条件。
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