Determination and Application of Reasonable Levels for Highly Directional Long Boreholes in Deep Outburst Coal Seams

Table 3

Table of high drilling parameters.

Hole	Normal distance/m	Opening orientation (°)	Opening inclination (°)	Drilling depth/m	Hole opening position/m
1	15	50	15	110	In front of the drill site, 1.0 m below the top plate
2	15	55	15	140
3	15	60	18	330
4	18	62	18	330	In the right gang of the drill site, 1.0 m below the top plate
5	20	64	18	330
6	22	66	18	330
7	24	68	18	330