Abstract:

Although the traditional track-mounted hydraulic tunnel drilling rig posses the characteristic of high efficiency and small labor intensity, but they also have a small range of angle and height adjustment which is limited by the structure of the luffing mechanism. There is a great demand for the device to construct multi-layer holes in thick seam coal mine, such as Jixi mine area in Heilongjiang and Jincheng mine area in Shanxi. Therefore, we developed the new track-mounted hydraulic tunnel drilling rig for wide-angle and multi-layer holes. The new drilling rig has a ±90°range of azimuth rotation, and the new laffing mechanism can easily adjust the angle and height of the mainframe. It is possible to realize the wide-angle construction, the multi-layer holes construction and the cross-belt construction with this device. Underground test proved that the new drilling rig is suitable to multi working condition, and the system is highly stable and dependability.

Key words: wide angle, multi-layer holes, track-mounted drilling rig, cross-belt, development