复杂地质条件下综采工作面矿压显现规律研究

Mine Pressure Behavior Law of Fully-mechanized Face in Complicated Geological Condition

采用尤洛卡公司KJ216顶板动态监测系统,对大安山煤矿轴13槽东一面工作面进行矿压监测,通过对工作面液压支架压力和上下顺槽超前支护压力的分析,得到了具有复杂地质构造的缓倾斜煤层综采工作面的矿压显现规律,保证了其安全回采,为以后相似条件下的工作面回采提供了科学的依据。监测分析结果表明:工作面老顶平均初次来压步距为52.67 m,平均周期来压步距为22.12 m及来压时刻上下顺槽工作面前方压力增高的范围分别是8～16.2 m和5.2～13.6 m,压力增高平均峰值分别为24 MPa和23.57 MPa,且工作面中部支架阻力要明显大于上部和下部。

Using the top dynamic monitoring system KJ216 of Uroica company,the mine pressure monitoring of the 1st east working face of the 13th seam axis working face in Da＇anshan coal mine is made.Through analyzing the monitoring results,the mine pressure behavior law of fully-mechanized face having gently inclined seam with complicated geological structure is obtained,which ensures the safe mining of working face and provides the scientific basis for the similar face.The monitoring results show that the average first weighting length is 52.67 m,the average periodic weighting length is 22.12 m,the range of stress increasing in front of the face is 8 ～ 16.2 m and 5.2 ～ 13.6 m and the average peak of stress increasing is 24 MPa and 23.57 MPa as the pressure changes,and the mine pressure at the middle of the face is obviously higher than the upper and the lower part.