An Optimal Algorithm for Planning Shearer Trailing Drum Cutting Path

Table 2

Statistical data of dip angle of coal seam bottom boundary (unit: °).

Sample point	Starting point of each cutting					End point of the 5^th cut	Average	Standard deviation
	1^st cut	2^nd cut	3^rd cut	4^th cut	5^th cut
a	−6.39	−6.39	−4.18	−1.89	−1.23	−1.06	−3.52	2.27
b	−0.73	−0.95	−3.50	−3.50	−3.50	−3.50	−2.61	1.26
c	−0.28	−0.28	1.83	1.83	1.83	1.83	1.13	0.99
d	−12.53	−10.96	−8.38	−8.32	−8.32	−8.32	−9.47	1.67
e	−0.25	−1.81	−1.81	−5.86	−6.06	−6.06	−3.64	2.41
f	−7.89	−8.15	−8.15	−8.15	−8.15	−8.15	−8.11	0.10
g	−2.30	−2.62	−3.13	−3.31	−3.31	−3.31	−3.00	0.40
h	−3.22	−3.87	−5.52	−5.52	−5.52	−5.52	−4.86	0.95
i	−4.20	−5.96	−8.57	−8.57	−8.58	−8.58	−7.41	1.72
j	−7.45	−7.41	−7.41	−7.41	−7.06	−7.06	−7.30	0.17