| 摘要 |
A method to adjust a drilling apparatus drilling a tunnel into the ground or drilling open a tube line in the ground, which apparatus comprises a rotating drill bit (1), bit rotating equipment (6), a protective tube line (3) to be installed in the tunnel along with drilling, drill waste conveying equipment (4) inside the protective tube line and a pushing power unit (3) to force at least the drilling equipment (1, 2, 4, 5) forward while drilling, and in which method the pushing force of the said pushing unit pushing the drilling equipment from behind is adjusted. While drilling, the rotative moment of drill bit (1) and the drill bit pushing force are sensed, whereat the substantial rise of the rotative moment and/or the substantial increase of the force pushing the drill against the surface that is being drilled steers the drill bit (1) inducing pushing force to back the drill bit or, at least, to stop the forward travel of the drill bit when source (8) of the said pushing force is located behind the complete drilling equipment (1, 2, 3, 4, 5, 6, 7). |
