某煤矿井筒破坏与监测信息研究分析

Research and Analysis on a Coal Mine Shaft Damage and Monitoring Information

井筒信息监测是判断井筒工作状态和前期变化的重要手段。为研究井筒的受力变形与周围环境变化的关系,寻找造成井壁受力以及发生大变形的原因,通过对井筒监测和分析,发现同一水平面上井壁与周围土层变形并不是均匀同步发生的,呈现季节交替的特性和某一点变形较其他点变形量大的特征。分析发现,采矿期间地下水位的下降造成了井壁与土层的不同步变形,这种不同步变形对井壁产生的竖向附加力是造成井壁受力和变形增大的主要原因。分析结果为研究井壁破坏和变形分析提供参考。

Wellbore information monitoring is an important method to judge the wellbore working state and early changes.In order to study the relationship between the stress and deformation of the wellbore and the change of the surrounding environment,the reasons for the stress and large deformation of the wellbore are explored.Through the monitoring and analysis of the wellbore,it is found that the deformation of the wellbore and the surrounding soil layer on the same horizontal plane does not occur uniformly and synchronously,showing the characteristics of seasonal alternation and that the deformation at a certain point is too large than that at other points.The analysis found that the decline of groundwater level during mining caused the asynchronous deformation of shaft lining and soil layer,and the vertical additional force generated by this asynchronous deformation on shaft lining was the main reason for the increase of shaft lining stress and deformation.The analysis results provide reference for the study of wellbore failure and deformation analysis.