Quantitative Identification of the Water Resistance Capacity of Composite Strata in Mining Coal Seam Floors

Table 6

Hierarchical structure performance index of aquiclude.

Target layer	Criteria layer	Scheme layer
Evaluation of water resistance of the coal seam floors (A)	Geological structure and disturbance damage (B1)	The thickness of effective aquiclude (C1)
		Fault factor values (C2)
	Compression resistance and permeability (B2)	Composite compressive strength (C3)
		Core recovery rate (C4)
	Lithology combination and water blocking performance (B3)	Equivalent water resistance coefficient (C5)
		Thickness ratio of plastic brittle rock (C6)