关键词: 长距离定向钻孔, 巷道掘进, 顶板砂岩含水层, 水害防治, 富水性

Abstract: In order to explore the water-abandance of the aquifer on the roadway under complex hydrogeological contions, corresponding water disaster prevention and control measures were formulated to ensure the safe tunneling of the roadway. The long distance directional drilling technique was used to detect the aquifer on the roadway in advance before roadway tunneling. Based on the observation data of water quantity during borehole drilling, the water-abandance condition of aquifer on the roadway was studied. According to the waer attenuation curve of the borehole, the spatial difference of dydaulic connection between composite aquifer on the roadway was determined. It has been verified by practice that the long distance directional drilling can delineate the waer-abundance area of aquifer on the roadway more accurately, at the same time, it can also find out the hydraulic connection characteristics of the composite aquifer on the roadway, and play a significant role in interrepting the groundwater seepage from aquifer into the roadway. The results show that the long distance directional drilling technology is effective in water disaster prevention and control in tunneling roadway under the complicated hdydrogeological conditions.