急斜煤层大段高工作面矿压显现规律

Strata Behavior in Large Section Face of Steep Seams

为研究急斜煤层大段高开采工作面的矿压显现规律,在与普通段高工作面对比基础上,通过现场实测,对大段高工作面的来压显现特征及支架的承载特性进行了深入研究.研究表明：1）大段高工作面沿走向具有明显的周期性矿压显现,周期来压步距在21~26 m左右.2）支架的工作阻力并不会随着段高与采深的增加而大幅度增加,支架将受到其上方上覆岩层临时结构的保护作用.3）随着开采深度和充填体密实程度的增加,周期来压步距呈现增大的趋势.4）一次增阻在支架运转特性类型中所占比率最高,支架能够保持良好的运转特性.

Based on field observation and contrast between large section face and ordinary section face,we studied the characteristics of strata behavior and support operation of large section working face.The result shows that 1） the large section face has obvious period strata behavior along strike,with the space length of period strata behavior being 2126 m,2） the support loads does not increase with the increase of mining depth and section height,indicating that the support is protected by overhead provisional structure,3） the space length of period strata behavior shows an increasing trend with the increase of mining depth and filling density,and 4） because the first increased support resistance accounts for the highest proportion of operation type,the support can keep a good operation performance.