厚硬顶板开采条件下不同采动空间致冲规律探究

Study on the Impact Law of Different Mining Space under the Condition of Thick Hard Roof Mining

选取鄂尔多斯深部矿区厚硬顶板条件下典型代表工作面,统计分析了单面采空、双面采空、三面采空不同采动空间下微震事件发生规律,推断了顶板运动状态,并从顶板运动角度,得出了双工作面"一次见方"期间冲击危险程度相对较高的结论,提出了顶板预卸压措施,对于指导鄂尔多斯深部矿区厚硬顶板开采条件下冲击地压防治具有明显借鉴意义。

The typical representative working face under the condition of thick hard roof in Ordos deep mining area is selected,the occurrence law of microseismic events under different mining spaces of single-sided goaf,double-sided goaf and three-sided goaf is statistically analyzed,and the movement state of roof is inferred.From the point of view of roof movement,it is concluded that the impact danger degree of double working face is relatively high during the period of"seeing square at one time",and the measures of roof pre-unloading are put forward.It has obvious reference significance for guiding the prevention and control of rock burst under the condition of thick hard roof mining in Ordos deep mining area.