基于相似模拟试验的综放工作面矿压显现规律

摘要

In view of research situation of the fully mechanized top-coal caving, the simulation test model for fully mechanized top-coal caving was presented. With the top-coal caving process promoted, the variation of top-coal subsidence and abutment pressure was measured and the ground pressure behavior of fully mechanized top-coal caving was analyzed consequently. The test results showed that the top-coal subsidence improved slowly, nearly sharply, moderately and sharply. The peak abutment pressure initiated to decay and the periodic weighting of basic roof appears relatively moderate. Due to the action of "cushion" at the upper support, the ground pressure appears moderately.%基于综放开采技术的研究现状,建立了综放开采相似模拟试验模型,对综放开采过程进行了模拟.随着工作面推进,测量顶煤下沉量及超前支承压力的变化,进而分析综放开采工作面顶板矿压显现规律.试验结果表明:顶煤下沉量经历缓慢增加、趋于加剧、缓和、急剧加大等变化过程；支承压力在达到峰值后开始衰减,基本顶周期来压显现趋于缓和；由于支架上方“垫层”的作用,矿压显现较为缓和.