平岗煤矿坚硬顶板工作面矿压观测研究

Study on Pressure Observation for Hard Roof of Working Face in Pinggang Coal Mine

通过对平岗煤矿1202工作面的支架载荷观测,确定了该工作面顶板初次来压步距、周期来压步距、工作面压力分布规律,工作面支架的适应性。进一步阐明了工作面推进速度和小角度断层对来压步距及压力分布具有较大影响。工作面初次破断呈现横"O-X"型破断形式是造成来压初期中部压力偏小,而上下两端压力偏大的主要原因。

Through the observation of Pinggang coal mine 1202 working face support resistance, we confirmed some data such as the working face roof first weighting length, the periodic weighting length, surface pressure distribution, abutment pressure distribution law. Further explanation the working face advancing speed and low angle faults on pressure step and pressure distribution has a great influence. Working face first breaking shows itself horizontal type ＂O-X＂ broken form which is the reason the press early middle pressure too small, the pressure of the upper and lower ends too large.