哈拉沟煤矿超长工作面矿压显现规律研究

Research on the strata behavior regularity of ultra long working face in Halagou coal mine

为了对超长工作面矿压显现规律进行研究以指导现场实践,以哈拉沟煤矿12上101工作面为背景,采用现场实测方法,对普通工作面与超长工作面下的初次来压、周期来压特征进行了测定分析。结果表明:老顶初次来压期间,超长工作面对应老顶垮落步距、来压期间支架循环末阻力及动载系数均大于普通工作面;周期来压期间,超长工作面对应的来压步距小于普通工作面,而来压期间支架循环末阻力、动载系数和来压持续长度均大于普通工作面,即超长工作面周期来压强度相对较大,为后续类似工作面的开采提供指导。

In order to study the strata behavior regularity in ultra long working face,taking the 12-101 working face in Halagou coal mine as the background,the characteristics of initial weighting and periodic weighting of ordinary working face and ultra long working face were researched by using the field measurement method.The results show that during the period of the initial weighting,the main roof caving step,support resistance and dynamic load coefficient of the ultra long working face are larger than those of the ordinary working face,during the period of the periodic weighting,the weighting step is lesser,but the support resistance,dynamic load coefficient and weighting duration is larger,that is to say,the periodic weighting strength of super long working face is relatively large.The research provides guidance for similar mining conditions.