摘要
本文根据华亭县煤矿放顶煤工作面的矿压显现特点,分析探讨了急斜特厚煤层水平分段放顶煤工作面上覆岩层可能形成的两种结构形式及其对工作面矿压显现的影响,提出了放顶煤工作面支护设计、开采技术参数选择及顶板管理的建议。
Based on analysing the ground behaviour on the caving longwall face, this paper considers that the roof ofa horizontal slicing face with caving in 45°steeplyinclined and very thick seam likely forms two types ofstructure i.e., arch shell or articulated rock blocks onelastic foundation. When the caving height of top coalexcesses 8m, these two structures destabilizealternatively, resulting in a alternatively heavier andlighter weighting character. The former has the weightingof smaller intensity and rate but longer druation due to itspoor integrality of structure, while the latter is quite thecontrary. Therefore in supporting design, it isrecommended that the rock load resulted form thedestabilization of the two structures should be considered,and the once caving height should not excesses 10 m,Otherwise the roof would be difficult to be controlled.
出处
《矿山压力与顶板管理》
1992年第1期38-42,103,共5页
Ground Pressure and Strata Control
