Hydrological Characteristics of Ordovician Karst Top in a Deep Region and Evaluation of Its Threat to Coal Mining: A Case Study for the Weibei Coalfield in Shaanxi Province, China

Table 2

Comparison table of dissolution and dissolution of main types of Ordovician karst in the study area.

Rock type (size)	Total dissolution amount (g)	Specific dissolution	Total solubility amount (g)	Specific solubility	Physically crushed capacity (g)
Whole limestone ()	0.1375	0.9543	0.1370	1.0602	0.0005
Whole dolomitic marl ()	0.02890	0.24518	0.02074	0.2228	0.00816
Fractured limestone ()	0.1473	1.0223	0.1467	1.1353	0.0006
Fractured dolomitic marl ()	0.03080	0.26130	0.02262	0.2430	0.00818