急斜煤层阶段煤柱稳定性与顶板控制研究

为了保证急倾斜煤层综放时的生产安全,采用物理相似模拟实验对急斜煤层水平分段放顶煤开采时顶板的破断垮落规律和煤柱与顶底板的一体结构进行了研究。研究结果表明,在阶段煤柱的支撑下,急斜煤层的顶板极难垮落,很容易出现大面积悬顶现象。而阶段煤柱的连锁破坏,加速了工作面上方巨厚覆岩的大面积垮落,最终导致矿震。

Steep Seam Stage Coal Pillar's Stability and Roof Control

In order to ensure the safety in production of steep seam shallow mechanized caving,studying the rules of roof collapse breaking and the structure of coal pillar and roof by using physical similar simulation experiment. The results show, in support of pillar under the stage, steep seams roof caved difficultly, it is prone to large roof overhang phenomenon. The failure of chain pillar stage accelerated the thick overlying rock face above a large area collapse, eventually leading to mine earthquake.