母杜柴登煤矿地表动态移动变形规律研究

Study on the dynamic surface movement and deformation law in Muduchaideng Mine

鄂尔多斯地区具有风积沙覆盖、厚基岩、大采深的特点。为了研究其地表移动变形规律,在母杜柴登煤矿30201和30202工作面地表布设了地表移动观测站,分析了其地表动态变形规律。研究表明:在母杜柴登煤矿地质采矿条件下,地表下沉速度较小,下沉量增加速率较平缓;地表最大下沉值为1687 mm,最大倾斜变形值为9.72 mm/m,起动距为227.7 m;最大下沉速度滞后距为319~396 m,最大下沉速度滞后角为57.8°~63.1°。

There were the characteristics of aeolian sand coverage,thick bedrock,and large mining depth in Ordos area.In order to study the law of surface movement and deformation under the geological and mining conditions,the surface movement observation station was set up on the corresponding surface of 30201 and 30202 working faces in Muduchaideng Mine.Law of surface dynamic deformation under the condition was analyzed.Results showed that the surface sinking speed was small and the subsidence rate increased gently under the conditions.Maximum surface subsidence value was 1687 mm,the maximum inclined deformation value was 9.72 mm ing distance was 227.7 m.Maximum subsidence speed lag was in the range of 319~396 m,the lag angle of maximum subsidence speed was 57.8°~63.1°.