金属矿地下开采过程中，采场顶板稳定是矿山正常、高效回采的前提。
During the process of underground mining, the stabilization of stope roof is the basement of normal and productive mining.
应用表明，采场顶板长锚索预锚固技术施工安全，成本低，支护效果好，值得推广应用。
The application of this technique shows that it is well worth developing because of its safe construction, low cost and good supporting effects.
运用相似模拟和理论分析相结合的方法，揭示了采场顶板初次破断机理，确定了有关参数。
Based on simulating model test and theoretical analysis, the mechanism of main roof first breaking is revealed, and the asymmetry breaking parameter is determined.
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