Analysis of measured law of surface movement and deformation in Shuangshan Coal Mine
In order to explore the law of surface rock movement in fully mechanized caving mining of Shuangshan Coal Mine,the 308 fully mechanized caving mining face is taken as the research object,and the law of surface movement and de-formation and related surface rock movement parameters are given through the analysis of its surface observation data.We analyze the surface movement and deformation process of fully mechanized caving face mining in Shuangshan Coal mine ac-cording to the surface subsidence and damage.The research shows that when the cumulative subsidence value of each meas-uring point on the surface is less than 30 mm for 6 consecutive months,the surface movement reaches a stable state,that is,the subsidence speed decreases to 0.17 mm/d.According to the downward trend of the average maximum subsidence speed of the surface,it is judged that the curr-ent surface movement tends to be stable.According to the downward trend of the sub-sidence speed,it can be inferred that the surface subsidence of the 308 fully mechanized caving face will reach a stable state after 5 months.The leading influential angle is obtained by calculating and analyzing the measured data,which can provide the basis for underground mining and safety coal pillar retention in the future.
万方数据
维普
