Cause Analysis and Solution of Comment Faults Occurred in Overlong Borehole in Underground Mine
Abstract：According to the application of an 1 000 meters drilling rig in the underground mine, frequent phenomenon of in borehole acci- dents occurred in the overlong （over 600 m） borehole gas drainage operation, certain causes of the borehole outburst, borehole collapsed, borehole jammed and drilling bit jammed were studied and the related treatment methods were provided. The paper held that the in bore- hole accidents occurred in the overlong borehole mainly caused by the seam geological structure conditions, the performances of the 1 000 meters drilling equipment and related facilities and the gas drainage technique with the overlong borehole. With the adjustment of the drill- ing technique and parameters, drilling tools improvement and the application of the special device, the borehole complement quality of the overlong borehole could be effectively improved, and in borehole accident occurred possibility during the overlong borehole construction would be highly reduced.
Keywords：1 000 meters drilling rigoverlong boreholeparameters of drilling techniqueconstruction drilling toolsspecial device
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 58-61 )