6305综放工作面厚表土层薄基岩地表下沉运动特征及原因分析

Characteristics and Cause Analysis of Subsidence Movement of Thick Topsoil and Thin Bedrock in 6305 Fully Mechanized Caving Face

为了探索厚表土层薄基岩地表下沉运动特征及原因分析,以典型的厚表土层薄基岩厚煤层开采的新巨龙煤矿6305综放工作面为基础,采用理论分析和现场实测相结合的方法进行研究。首先研究得出6305综放工作面地表下沉可分为3个阶段,分别为缓慢下沉阶段、加速下沉阶段、下沉衰减阶段,并分析了各阶段的地表下沉特征,然后基于6305综放工作面覆岩运动和微震数据解释了该工作面地表沉陷特征及三阶段产生原因。

In order to explore the characteristics and cause analysis of surface subsidence movement of thin bedrock in thick topsoil layer, based on the 6305 fully mechanized caving face of Xinjulong coal mine, which is typically exploited in thick topsoil layer and thin bedrock and thick coal seam, adopts the method of combining theoretical analysis and field measurement. Firstly, the surface subsidence of 6305 fully mechanized caving face can be divided into three stages, which are slow subsidence stage,accelerated subsidence stage and subsidence attenuation stage, and the characteristics of surface subsidence at each stage are analyzed. Then, based on the overburden movement and microseismic data of 6305 fully mechanized caving face, the surface subsidence characteristics and three stages of the working face are explained.