An Optimal Algorithm for Planning Shearer Trailing Drum Cutting Path

Table 1

Comparison of the two advancing methods (unit: m²).

Sample point	Optimal cut			Memory cut			Optimization rate
	Floor dinting area	Retaining bottom coal area	Total	Floor dinting area	Retaining bottom coal area	Total
a	0.0197	0.0170	0.0369	0.0784	0.0356	0.1140	67.61%
b	0.0165	0.0134	0.0299	0.0186	0.0638	0.0825	63.78%
c	0.0016	0.0228	0.0244	0.0425	0.0170	0.0596	58.95%
d	0.0090	0.0147	0.0238	0.2911	0	0.2911	91.84%
E	0.0406	0.0158	0.0564	0	0.4308	0.4308	86.92%
F	0.0141	0.0127	0.0269	0.0321	0	0.0321	16.26%
g	0.0094	0.0067	0.0161	0	0.0854	0.0854	81.12%
h	0.0096	0.0155	0.0251	0	0.1663	0.1663	84.88%
i	0.0183	0.0200	0.0383	0.0184	0.1361	0.1545	75.24%
j	0.0068	0.0130	0.0198	0.0405	0	0.0405	51.15%
Average	0.0146	0.0152	0.0298	0.0522	0.0935	0.1457	67.78%; 79.58%