基于多源数据分析的综放工作面矿压异常显现特征研究

Characteristics of abnormal underground pressure in fully mechanized caving face based on multi-source data analysis

研究矿压显现特征主要依赖于分析工作面及巷道矿压监测数据,由于缺乏对顶板运移特征的监测和分析,仅依靠研究矿压监测数据很难得出矿压异常的真正原因,不能有效的指导生产实践。以长平煤矿5302工作面为研究背景,在传统矿压监测技术的基础上,引入微震监测技术实现对工作面顶板活动规律的实时监测,基于支架压力、巷道围岩应力应变、顶板破断能量事件等多源数据的分析结论,研究工作面多种矿压异常现象的顶板活动特征,得出以下结论:基本顶超前破断无法形成较大结构是工作面矿压显现较弱的主要原因;工作面中下部顶板淋水是由于K8细砂岩含水层破断所致;工作面超前20-100m范围较高层位顶板破断诱发巷道产生较大变形。

The research on the characteristics of mine pressure mainly depends on analyzing the monitoring data of working face and roadway mine pressure. Due to the lack of monitoring and analysis of the characteristics of roof migration, it is difficult to find the true cause of abnormal rock pressure only by studying the rock pressure monitoring data. This paper takes the 5302 working face of Changping Coal Mine as the research background. On the basis of traditional mine pressure monitoring technology, microseismic monitoring technology is introduced to monitor the roof activity of working face in real-time. Based on the analysis conclusions of multi-source data such as support pressure, roadway surrounding rock stress and strain, roof breaking energy events, etc.,the roof activity characteristics of various underground pressure abnormal phenomena in working face are studied. The following conclusions are drawn: failure of the main roof to break in advance to form a larger structure is the main reason for the weak mining pressure of the working face;the roof spray in the middle and lower parts of the working face is caused by the breaking of the K8 fine sandstone aquifer;the working face is 20-100 m ahead the roof rupture of the higher layer in the range induces greater deformation of the roadway.