Research on fault detection application of directional drilling technology in coal mine

Geological structure has an important impact on the safe production of coal mines.Advance detection and understanding of the development of geological structures can optimize the layout of mining roadways, reduce the coal waste of resources, and avoid delays in mining and production replacement work.The No.6 coal seam in Tangjiahui coal mine is an extra-thick coal seam with stable and large mining area.The structure in this mine is complex, with many faults and large gaps, which has an important impact on the mining layout and safety production of the working face.Advance detection of fault locations has great significance.Directional drilling technology in coal mines has the characteristics of long effective distance and precise trajectory control.The technology could detect fault locations and falls from a long distance.By constructing long-distance directional boring main holes and multi-branched holes in one drilling site, the fault location and drop can be accurately controlled.Through directional drilling exploration and verification, the existence of DF008 is determined, and the comprehensive drop is about 13 m, which provided an accurate basis for the advanced layout and safe production of mining faces in this area.