Main Controlling Factors and Formation Mode of Geothermal Anomaly in Eastern Chenghe Mining Area of Weibei Coalfield

Table 3

Statistics of regional heat flow value.

Drill hole number	Calculation section range (m)	Geothermal gradient (°C/km)	Lithology proportion/%		Weighted average thermal conductivity (W/(m·°C))	Terrestrial heat flow (mW/m^2)
			Mudstone and sandstone	Fine sandstone
40-1	136.7-510.16	29	0.65	0.35	2.658	77.087
40-2	118-532.44	33	0.61	0.39	2.669	88.086
41-2	108-492.7	35	0.39	0.61	2.735	95.724
41-3	130.42-423.22	45.8	0.71	0.29	2.641	120.976
42-1	134.43-531.90	30	0.71	0.29	2.641	79.230
42-2	98.13-439.1	30	0.90	0.10	2.586	77.575
42-3	104.28-385.79	48.5	0.68	0.32	2.649	128.489
43-1	107.16-490.10	30	0.71	0.29	2.639	79.173
43-2	70.65-424.38	28	0.62	0.38	2.666	74.659
43-3	109.75-385.70	37	0.81	0.19	2.613	96.688
CH209	77.0-429.50	33.4	0.00	1.00	2.860	95.524
CH210	84-508.8	30	0.07	0.93	2.838	85.128
CH211	119.5-464.8	27.1	0.52	0.48	2.696	73.050
J1-1★	123.1-541.12	27	0.56	0.44	2.683	72.441
J1-2	128.65-510.03	29	0.41	0.59	2.728	79.102
J2-1★	143.41-556.80	30	0.59	0.41	2.674	80.214
J2-2	118-538.22	32	0.53	0.47	2.694	86.203
J2-3	129.5-513.38	35	0.56	0.44	2.683	93.900
J3-1	130.5-552.22	29	0.72	0.28	2.637	76.468
J3-2	113.45-535.46	30	0.66	0.34	2.654	79.608
J3-3	132.74-519.28	27	0.66	0.34	2.655	71.692
J3-4	116.49-491.17	29.5	0.71	0.29	2.640	77.868
J3-5	136.5-444.89	36	0.82	0.18	2.608	93.890
J4-1	104.8-529.87	27	0.70	0.30	2.642	71.347
J4-2	113.64-491.92	14	0.71	0.29	2.640	69.952
J4-3	119.2-478.15	33	0.51	0.49	2.699	89.060
J4-4	124-446	38	0.89	0.11	2.589	98.366
J4-5	122.12-409.67	39	0.79	0.21	2.619	102.129
J5-1★	109-501.01	35	0.52	0.48	2.694	94.307
J5-2	116.4-492.79	25	0.60	0.40	2.672	66.806
J5-3	107.55-443.95	33	0.52	0.48	2.695	88.941
J5-4	113-403.55	42	0.95	0.05	2.574	108.089
J5-5	106-371.04	38	0.80	0.20	2.615	99.368
J6-1	99.5-482.75	37	0.71	0.29	2.641	97.718
J6-2	115.9-460.72	34	0.61	0.39	2.670	90.771
J6-3	108.4-410.85	41	0.69	0.31	2.646	108.472
J6-4	124-388.77	35	0.62	0.38	2.666	93.326
J7-1	110.95-455.35	40	0.59	0.41	2.674	106.960
J7-2	101.22-435.2	44	0.69	0.31	2.646	116.444
J7-3	113.5-390.52	34	0.80	0.20	2.615	88.915
J8-1	91-529.94	37	0.58	0.42	2.679	99.115
J8-2	99-326.26	47	0.60	0.40	2.671	125.550
J9-1★	84-502.64	35	0.61	0.39	2.670	93.462
XC1	120.3-541.7	32.9	0.58	0.42	2.677	88.090
XC2	120.08-417.58	42.8	0.70	0.30	2.644	113.175

Note: ★ is stable temperature hole.