Shock and Vibration / 2019 / Article / Tab 1

Research Article

Analysis of the Occurrence Mechanism for Coal and Gas Outburst Based on Multiple Discriminant Indices

Table 1

Lithology and thickness of the roof and floor of Panel 31020.

NameLithologyFeature descriptionThickness

Main roofFine sandstoneGray fine sandstone with a small number of patches at the top, sandy mudstone, mica sheets, and strips at the middle and lower parts10.9 m
Immediate roofSandy mudstoneGray-black sandy mudstone, dense, mica-bearing fragments4.01 m
Immediate floorMudstoneGray mudstone0.3 m
Main floorSandy mudstoneGray sandy mudstone, massive1.5 m∼12 m

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