深部大采高综放开采覆岩运动规律研究

Study on the Law of Overlying Strata Movement in Deep Mining and High Comprehensive Caving Mining

龙堌煤矿1301工作面为深井大采高综放工作面,为了分析大采高条件下综放开采煤壁裂隙的发育特征,应用UDEC软件研究了在深井复杂条件下,采场应力随着工作面推进的分布特征和顶煤塑性破坏规律的影响,确定了1302工作面基本顶来压时,超前支承压力峰值点位置至煤壁距离由来压前的8.5 m变为12.2 m(初次来压),周期来压步距为23 m。

1301 working face in Longgu Coal Mine deep well mining height fully mechanized face with caving working face, in order to analyze large mining high under the condition of fully mechanized top coal caving characteristics of the development of the coal wall fracture, using UDEC software was studied in complicated deep well conditions, stope stress with the effect of elastoplastic failure law of working face advancing distribution characteristics of top coal, determined the 1302 face basic top pressing ahead for 12.2 meters（initial pressure variable pressure of abutment pressure peak position to coal wall distance origin of 8.5 meters）, the periodic weighting step distance is 23 meters.