Research Article

Research on Coal and Rock Type Recognition Based on Mechanical Vision

Table 2

Analysis of rock types and characteristics.

Rock typesRock characteristics

GraniteBright black, flat arrangement, fine and uniform grains, tight structure, high quartz content, bright luster
DiabaseFine middle grain, dark gray, diabase structure, or subdiabase structure
AnorthositeLabradorite or andesine, dark minerals are orthopyroxene, clinopyroxene and hornblende, less than 10% of the total, subhedral, coarse-grained structure
Quartz sandstoneLow shear strength, gentle, crisscross fracture, white, light green, dark gray, etc.
LimestoneGray, gray-white, gray-black, yellow, light red, brown-red, and other colors, small hardness, calcite, accompanied by dolomite, magnesite, and other carbonate minerals of limestone.
SandstoneLight brown or red, compositions include silicon, calcium, clay and iron oxide, sand content greater than 50%, consisting of quartz or feldspar
ShaleThin sheet or lamellar, dense surface, low hardness, dim gloss, gray-black and black with organic matter, brown-red and brown-red with iron, and yellow, green, and other colors
QuartziteGreen, gray, yellow, brown, orange-red, white, blue, purple, red, etc., quartz, block structure, granular amorphous structure, crystalline aggregates