Study on deformation characteristics and early warning level of GNSS monitoring data in dump
In order to study the deformation law and disaster warning level of dump slope,taking the slope of inclined internal dump in the first mining area of Yihua Open-pit Coal Mine as the engineering background,the article divides the deformation stages of the accumulation loose body,and studies the deformation characteristics of each stage.Combined with the data of three monitoring points in the dump,the article analyzes deformation characteristics of the dump,and sets the early warning threshold of the dump.The results show that the dump is divided into three deformation stages:instantaneous deformation,main consolidation deformation and secondary consolidation deformation.The main consolidation deformation stage of the dump is characterized by rapid deformation in the early stage and slow deformation in the later stage.The dump is mainly settlement deformation,and the horizontal deformation is affected by the free surface and the dip angle of the stratum.The displacement of the rapid deformation stage is about 1/2～2/3 of the overall monitoring amount.
万方数据
维普
