摘要:
在煤矿生产中，工作面的推进速度是影响支撑压力的重要因素之一。文章基于火铺矿21126综采工作面生产技术及地质条件，采用现场矿压实测及FlAC3D数值模拟，研究了不同推进速度时的矿压显现规律。研究表明，工作面前方35~80 m区段内，应力变化较大，受采动影响较为强烈;工作面前方35 m范围内应力变化剧烈，受采动影响十分严重。推进速度大于7 m/d时石门右侧塑性区范围加大，右侧围岩松散垮落现象明显，支护工作难度加大，所以工作面推进速度为5~7 m/d较为合理。
In coal mine production, the speed of working face advancing is one of the important factors affecting the support pressure. Based on the 21126 production technology and geological conditions of fully mechanized working face of Huopu Mine, the insitu rock pressure measurement and FlAC3D numerical simulation, the behavior regularity of the mine pressure at different advancing speeds is studied. Research shows that: in the 35 - 80 m segments in front of the working face, stress change is bigger, strongly affected by mining; within the scope of 35 m in front of the working face, stress changes drastically, seriously affected by mining; when the speed is greater than 7 m/d, the plastic zone at the right side of the stone door increases; surrounding rock at the right side looses; caving phenomenon is obvious and support work becomes harder. So, working face advancing speed which is 5 to 7 m/d is more reasonable.