煤层底板采动变形破坏规律研究

Research on Deformation and Failure Law of Coal Seam Floor

以潘二矿11223工作面3煤开采为例,利用FLAC3D软件模拟煤层开采后地板采动变形破坏规律,从中获取底板破坏深度,并与理论计算结果相对比,进而分析其突水的可能性。底板破坏深度模拟结果为20 m左右,与距离底板近27 m处的第1层灰岩较为接近,因此认为该工作面3煤在开采过程中有突水的可能性。

Case study in Panji No.2 coal mine 11223 face three coal mining, using FLAC3 Dto simulate the law of seam floor deformation and failure after mining coal,and derive floor failure depth, compared with theoretical calculations, and then analyze the possibility of water inrush. Floor failure depth simulation result ranges from 20 m to 24 m, close to the first layer of limestone with a distance of nearly 27 m to the bottom, so that water inrush may accur in three coal of the face during the mining process.