Treatment Technology of Roof Watering in Ditch Driving Roadway of Shallow Coal Seam

Abstract

To study the treatment problem of the roof watering of the roadway during the ditch driving of the shallow coal seam, the topography and geological conditions at the ditch of the 4-2 coal centralized auxiliary transport roadway in Zhangjiamao Coal Mine are analyzed. Based on the hydrogeological exploration hole and roof exploration hole, the cause of the roadway outflow is analyzed. The water source of the roadway watering is the weathered bedrock water, and the channel is the anchor hole. The idea of water stoppage by grouting is put forward to plug anchor cable hole, and the roof water treatment project is designed. The result proves that the method of directly blocking the anchor cable hole, and the cement slurry, cement-water glass double-liquid slurry and urea-formaldehyde resin chemical slurry are successively injected, the method can effectively block the large-scale roof watering of the ditch roadway.

Keywords

• shallow coal seam
• ditch driving
• bedrock weathered zone
• roof watering
• water plugging by grouting