屯宝煤矿综放巷道深部围岩动态变形与失稳监测

Monitoring for Dynamic Deformation and Destabilization of Deep Surrounding Rock in Fully Mechanized Caving Face of Tunbao Coal Mine

针对屯宝煤矿1193工作面综放巷道围岩变形严重,顶板下沉量大,局部顶板冒落等问题,采用多点位移计对综放巷道围岩动态变形实时监测,分析顶板岩层变形及失稳特征。结果表明:顶板上覆岩层在失稳前均出现任意相邻两个监测基点位移差h持续增加的现象,并辅于现场实践验证,提出采用多点位移计基点位移差h的持续增加作为顶板围岩失稳的前兆。

Aiming at the serious surrounding rock deformation,great roof settling and regional roof caving in Tunbao coal mine 1193 fully mechanized caving face,the characteristics of roof strata deformation and destabilization was analyzed with multiple position displacement meter real-time monitoring. The result shows that,roof overlying strata destabilizes after the continuous increasing of displacement difference（ h）,measured at any two adjacent monitoring base points. The result was verified in in-situ test,proposing that,continuous increasing of base point displacement difference（ h）,measured with multiple position displacement meter,could be seen as a pre-warning for roof overlying strata destabilization.