多工作面开采过程中地表沉陷变形监测

Deformation Monitoring of Surface Subsidence During Multi Face Mining

传统矿区地表沉陷监测大多针对一个工作面的开采过程,缺乏工作面开采时对临近已开采工作面地表的移动变形监测。通过在临近工作面设置地表监测站,采用GNSS控制测量和连续运行监测测量方式,获取当前工作面开采过程中和临近采空区地表的移动变形数据,研究矿区多工作面开采过程中造成的地表沉降变化和岩移规律,为矿区开采过程中地表建构筑物保护和移民搬迁提供安全保障。以孟村矿401102和401101工作面为例,结合401101工作面沉陷监测结果,对401102工作面开采过程中地表变化进行观测,研究岩移观测站的布设、观测方法、岩层变形规律等,获取该工作面地表和采空区的移动下沉量,总结矿区地表及岩层的移动变形规律。

The traditional surface subsidence monitoring in mining areas is mostly aimed at the mining process of a working face,and there is no Deformation monitoring monitoring of the ground movement near the mining face when the working face is mining.By setting up a surface monitoring station near the working face,using GNSS control measurement and continuous operation monitoring measurement methods,we obtain data on the movement and deformation of the surface during the current mining process of the working face and the adjacent goaf.We study the surface settlement and rock movement patterns caused by the mining process of multiple working faces in the mining area,and provide safety guarantees for the protection of surface buildings and relocation during the mining process of the mining area.Taking the 401102 and 401101 working faces of Mengcun Mine as examples,combined with the subsidence monitoring results of the 401101 working face,the surface changes during the mining process of the 401102 working face were observed.The layout,observation methods,and rock deformation laws of the rock movement observation station were studied,and the movement and subsidence of the surface and goaf of the working face were obtained.The movement and deformation laws of the mining area surface and rock layers were summarized.