The Law of Fracture Evolution of Overlying Strata and Gas Emission in Goaf under the Influence of Mining

Table 3

Parameters of the high-level directional long borehole.

Drilling site	Drilling number	Design layer (m)	Design horizontal distance (m)	Construction layer (m)	Construction horizontal distance (m)	Length (m)
6#	6-1	45	50	43	50	483
	6-2	40	40	41	40	480
	6-3	35	30	33	29	477
	6-4	25	20	24	19	474