The Hydrogeological Characteristics of Thick Alluvium with High Water Level and the Influence on Zhaogu Mining Area, Henan Province, China

Table 1

Structural characteristics of north flank alluvium.

Drill number	Thickness of alluvium (m)	Thickness of sand gravel (m)	Thickness of clay layer (m)	Drill number	Thickness of alluvium (m)	Thickness of sand gravel (m)	Thickness of clay layer (m)
54-3	450.58	2.16	45.58	11206	455.22	2.00	0.00
54-4	475.44	1.20	62.67	11207	407.10	6.70	9.75
56-1	466.93	2.49	20.44	11208	467.20	1.65	3.35
58-1-1	465.70	1.34	23.20	11209	539.20	16.95	60.25
58-1-A	504.51	11.92	32.33	11401	452.40	3.40	0.00
60-1	457.06	1.40	18.77	11402	463.70	13.45	37.15
60-2	452.60	5.22	103.02	11403	475.50	1.90	36.55
60-6	451.67	9.76	60.97	11404	485.04	3.15	46.99
63-8	431.01	34.44	24.91	11405	369.00	2.85	61.20
65-1	420.87	47.86	28.26	11406	479.58	4.61	4.17
5202	417.85	4.80	6.05	11407	436.05	4.25	2.00
5203	484.00	12.40	12.60	11408	490.87	5.85	22.32
6004	459.00	2.70	41.40	11409	532.46	2.64	31.87
6802	409.40	5.70	8.20	11601	457.30	3.60	40.70
6803	416.00	4.00	2.00	11602	473.68	5.37	0.00
6804	304.80	3.60	5.20	11603	520.87	1.50	71.12
6805	389.10	1.30	8.40	11604	479.26	4.00	0.00
11001	418.00	20.29	52.35	Main shaft inspection hole	518.00	3.70	2.20
11002	447.50	4.10	73.15	Ventilation shaft inspection hole	524.00	15.94	37.42
11201	447.46	9.80	76.99	Hydrologic observation hole	505.00	4.65	28.95
11202	469.80	4.06	0.00	West air shaft drill hole	502.51	0.80	23.23
11203	451.07	2.65	31.47	No. 1 supplementary exploration drill hole	521.53	5.95	4.30
11204	456.69	7.80	86.74	No. 1 supplementary exploration drill hole	461.36	3.00	3.20
11205	456.92	1.00	15.32	—	—	—	—