下组煤带压开采底板断层活化导水效应实测研究

Analysis of the floor fault activation water inrush measurement in Yangcun coal mine during mining

为探究底板断层采动活化及其阻水性变化特点,选择杨村煤矿4603工作面F6断层进行了采动过程断层带采动应力分布及活化导水效应的现场实测研究。根据实测结果,一方面,底板测点采动应力呈现工作面推过前变化缓慢及工作面临近、推过后增大幅度加剧的特点;另一方面,底板断层带水压在工作面推进过程中变化不大,其中在工作面临近测点时形成一个"水压力降压区"。综合对比分析得出4603工作面底板F6断层未因采动而活化形成导水通道,为认识底板断层采动活化特征提供了重要的实测依据。

Aimed at the problem of the safe mining of Yangcun coal mine has been seriously threatened by confined water under floor.Based on the hydrogeological conditions of fully mechanized workface on 4603 working face of Yangcun coal mine,the characteristics of fault activation water inrush were analysised by theoretical evaluation and in-situ measurement.The result of theoretical evaluation shown that coefficients of the floor water inrush were normal,the workingface could be mined safely.The result of stress in-situ measurement shown that the stress of the floor were increasing during the mining,which appeard slow-varied before the workingface passed through the position and speedy-varied after the workingface passed through the position.The in-situ measurement of water pressure shown that the water pressure of the floor changed unevidently,and in the vicinity of the workingface water pressure came down.Correlation analysised between theoretical evaluation and in-situ measurement,the faults were not alive during mining in 4603 workingface of Yangcun coal mine,it＇s safe to mine.And the results make a reference for the rationally mining in Yanzhou coal mine.