Loose soil
Secondary loess, secondary red soil, argillaceous soil, diatomaceous earth, etc.
Softer loose rock
Loess layer, red soil layer, soft mud layer, soft kaolin, peat, etc.
Soft rock
Fully weathered metamorphic shale, slate, phyllite, schist, lignite, bituminous coal, softer manganese ore, etc.
Slightly soft rock
Sand shale, oil shale, carbonaceous sandstone, massive limestone, dolomite
Weathered olivestone, pure peridotite, serpentinite
Medium hardness coal seam
Rock salt, potassium salt, crystalline gypsum, anhydrite, kaolin layer, limonite (including iron cap of the pine)
Frozen aquifer, volcanic tuff
Slightly hard rock
Pebble, gravel and gravel layer, collapse layer, phyllite, schist, fine-grained limestone, marble
Softer sand layer, serpentinite, pure peridotite
Hard bituminous coal, anthracite, loose sandy apatite ore
Medium hard rock
Chlorite, mica, sericite slate, light limestone, calcite and epidote skarn,
Valerian, schist, iron cap with pyrite spots,
Calcium cemented gravel, feldspar sandstone, quartz sandstone,
Micro-weathered ore-bearing peridotite and pure peridotite,
Quartz trachyte, hornblende porphyry, diopside rock, gabbro, yangqi, feldspar
Medium hard rock
Amphibole, mica, magnetite,
Hematite-bearing slate, phyllite, schist, microsilicified slate, phyllite, schist,
Quartz-containing limestone, including feldspar quartz sandstone, quartz monzonite, trachyte, hornblende porphyry, porphyrite, diabase tuff,
Siliceous sponge-like iron cap, chromite ore, sulfide mineral, scuttle hematite, hornblende magnetite, ore-bearing pyroxene, ore-bearing amphibole,
Gravel layer, gravel layer,
Micro-weathered coarse-grained granites, syenite diorite, porphyry, porphyrites, gabbro and other igneous rocks,
Siliceous limestone, vermiculite limestone, very loose apatite mine.
Hard rock
Silicified sericite slate, phyllite, schist, gneiss, attapulgite, alum, quartz-bearing carbonate rock,
Quartz barite rock,
Quartzite containing magnetite and hematite,
Coarse and medium-grained diabase, garnet skarn, calcareously cemented conglomerate,
Granite, gneiss, pegmatite, diorite, gabbro, quartz tourmaline,
Basalt, calcium-sodium plagioclase, pyroxenite, andesite, quartz anshan porphyry,
Ore-bearing peridotite, pure peridotite, etc., medium-grained crystalline sodium porphyry, hornblende porphyry,
The water forms a hematite layer, a layered pyrite, and a magnetite layer.
Fine-grained siliceous quartz sandstone, feldspar sandstone,
Containing large pieces of vermiculite limestone, coarse-grained strips of magnetite, hematite, quartzite.
Hard rock
Highly silicified slate, phyllite, limestone and sandstone, etc.
Coarse grain granite, granodiorite, granitic gneiss, syenite, gabbro, trachyte, pegmatite,
Micro-weathered quartz trachyte, microcrystalline granite,
Silicified tuff, angularized tuff, sericitized shale,
Fine crystalline silica, epidote, garnet skarn, silicate borax, garnet, iron ettbollach, microcrystalline skarn,
Fine-grained, fine-grained magnetite, hematite, quartzite,
Quartz containing pyrite, quartz with considerable pyrite, quartz-bearing layer of phosphate rock.
Very hard rock
Fine-grained granite, granodiorite, granitic gneiss, rhyolite
Microcrystalline granite, quartzite porphyrite, quartz trachyte,
Hard quartz pegmatite, coarse-grained layered skarn, shale,
a dense quartz iron cap,
Alumina containing jasper agate.
Very hard rock
Corundum rock, quartzite, jasper rock,
Blocky quartz,
The hardest iron shale,
Jasperite containing hematite, magnetite, bismuth silicified slate, chertite.
Ultra hard rock
Extremely dense quartzite, jasperite, shale, quartz, vermiculite
