Morphological Characteristics of Hydraulic Flushing under Multifactor Coupling and Its Enlightenment

Table 1

Hydraulic flushing drilling parameters.

Borehole no.	Dip angle (°)	Hole depth (m)	Length of coal section (m)	Actual coal output (t)	Calculated coal quantity (t)	Calculate the maximum long half-axis (m)	Calculate the maximum minor axis (m)
9-03	34	14.40	2.60	1.40	0.53	0.42	0.51
7-09	72	18.80	4.90	4.20	3.42	0.79	0.94
12-12	35	31.80	5.40	6.30	4.59	0.87	1.04
16-05	44	26.00	6.60	7.56	8.50	1.07	1.29
11-09	75	20.00	7.20	10.50	11.33	1.13	1.42