摘要
基于相似材料模拟实验与现场矿压观测,分析了坚硬顶板来压前的多次断裂现象。据此,提出利用顶板的反弹频率与反弹次数两个指标来进行来压预报,从而使预报结果更加准确可靠;指出了顶板的断裂与垮落存在着不一致性,给出了坚硬顶板初次垮落步距的计算方法。
Based on similitude material model tests andin-situ observation, the multiple breaking phe-nomenon prior to the weighting of competent roofwas discussed. Accordingly, a more precise andreliable method using the rebound frequency quan-tity to predict the roof weighting is put forward.The difference between roof breaking and cavingwas demonstrated in tests,and a method for calcu-lating the first caving span of competent roof ispresented.
出处
《矿山压力与顶板管理》
1993年第1期37-41,81,共5页
Ground Pressure and Strata Control
