井下钻孔电阻率法岐离率确定采动工作面“三带”顶界面发育高度

闫国才

The mine drilling resistivity method used to determine the development height of the "three zones" top interface of the mining face

Guo-Cai YAN

图3 回采位置距钻仓300 m处与距钻仓200 m处视电阻率差值断面

Fig.3 Sectional view of the apparent resistivity difference between the mining position at 300 m from the drill chamber and 200 m from the drill chamber