Research on Coal and Rock Type Recognition Based on Mechanical Vision

Table 1

Analysis of coal types and characteristics.

Coal types	Coal characteristics
Fat coal	Highly volatile substances, strong bonding, good melting, high wear resistance, many cross cracks, high porosity, many cokes at the root of coke, brittle
Lignitous coal	Mostly brown or brown-black, matte, low degree of coalification, relative density of 1.2∼1.45, strong chemical reactivity, efflorescent, not easy to store and transport
Coking coal	Medium volatility, fairly adhesion, coke with large block size, few cracks, high crushing strength, good wear resistance
Gas coal	Low degree of coalification, unbonded or slightly adhesive, black, weak glass luster, dense, conchoidal or flat fracture
Gas fat coal	High expansibility, high adhesion, highly volatile and colloidal layer, high exinite content
Anthracite	White or red, high degree of coalification, black, hard and metallic, conchoidal fracture, high carbon content, low volatile yield, high density, high hardness, and high ignition point