Application of Directional Drilling Technology in Coal Mine Water Prevention and Control

The practice shows that there are several advantages of directional drilling technology compared with rotary drilling, such as long effective distance, high drilling efficiency, multi-branch detection and high precision. Thus directional drilling technology has been widely applied in coal mining water prevention. Shendong Coal Group has introduced kilometer directional rig since 2010, which has been used for drainage water in goaf and loosen layer water, exploration of erosion zones and gob edge, verification of physical prospecting unusual area in Daliuta, Bulianta, Halagou, Shigetai, Baode, and Liuta mine. It got good effect, and also enriched and improved exploration of geologic structure and control of water disaster. Effective exploration of mine geology and hydro-geological conditions are carried out timely, which eliminates water hazards in advance. It provided a strong guarantee for mine safety and high efficiency production.