Application of Directional Drilling Technology and Reconstruction Technology of Surrounding Rock in Rich Water Area During Tunneling

Making full use of the advantages of underground directional drilling technology in coal seam, constructing directional borehole in advance during roadway excavation in underground coal mine face, and carrying out the exploration and grouting treatment for water-rich anomaly area of the aquifer in the roof of the roadway excavation area, a long distance shielded directional drilling for water detection and drainage and roadway surrounding rock transformation technology is formed. This paper introduces the directional drilling hole forming technology, water detection and drainage hole sealing technology, grouting technology for grouting hole and construction method. These technologies have been successfully applied in Maiduoshan Coal Mine and achieved good results.