纳林河二号矿井31101工作面覆岩破坏与涌水关系研究

Study on the relationship between overburden rock failure and water inflow in 31101 working face of Nalinghe No.2 Mine

通过对纳林河二号矿井31101工作面矿压数据统计与分析,总结该工作面来压步距、动载系数及周期来压呈现明显的"两次小压一次大压"交替规律。分析了每次来压异常时与其对应的覆岩结构形态,得出了每次来压前工作面淋水加大、涌水量变大的"先来水后来压"的涌水与矿压之间的规律,为蒙陕区域大采高工作面顶板管理与涌水量预测提供参考。

Based on the statistics and analysis of the mining pressure data of 31101 working face in Nalinhe No.2 Mine,it was concluded that the pressure step,dynamic load coefficient and periodic pressure of the working face showed an obvious alternating rule of“two small pressures and one large pressure”.The shape of the overburden structure corresponding to each pressure anomaly was analyzed,and the law between water rushing and mining pressure was concluded as“first water coming back pressure”with increasing water spraying and large water inrush on the working face,providing a reference for the roof management and water inflow prediction of the large mining height working face in Mengshan area.