官地矿重复采动造成地表破坏程度分析

Analysis on Surface Damage Caused by Repeated Mining in Same Location in Guandi Coal Mine

依据官地矿29401工作面上方地表沉陷观测站的监测数据,结合该工作面的地质采矿条件,分析了该矿重复采动造成的地表移动最大速度、地表移动的初始期和活跃期,得出了该地质采矿条件下重复采动对地表移动破坏造成的剧烈程度和持续时间,及在进行采煤沉陷治理时,需地表移动变形稳定后再治理更加合理,为该矿防治开采沉陷提供了科学的参考依据。

Based on the monitoring data on surface subsidence observation above the No. 29401 working face in Guangi Coal Mine, combined with the onsite geological mining conditions, the maximum surface movement speed and the rule in the initial and active stage caused by repeated mining are analyzed. It is concluded that the severity and duration of surface movement damage caused by repeated mining under the conditions of geological mining are ob-tained ,and it is more reasonable to treat the surface after movement come to stable. The paper provides a scientific basis for reference.