Quantitative Evaluation for the Threat Degree of a Thermal Reservoir to Deep Coal Mining

Table 10

Difference between the height of the “upper three zones” and the bedrock thickness.

Borehole number	Height of the “upper three zones”	Difference between the height of the “upper three zones” and the bedrock thickness	Borehole number	Height of the “upper three zones”	Difference between the height of the “upper three zones” and the bedrock thickness
Qs1	93.27	-39.73	Sx2	122.79	-143.21
Qs2	84.25	-235.14	Sx3	93.47	-156.05
Qs3	139.20	-87.75	Tk1	103.27	-187.55
Qs4	76.06	-263.67	Tk2	49.46	-70.98
Qs5	77.64	15.20	Tk3	97.70	-204.17
Qs6	93.87	-32.37	Tk4	165.11	103.46
Qs7	121.20	-193.92	Tk5	160.77	77.64
Qs8	118.30	21.58	Zc1	91.45	-37.45
Qs9	96.93	-69.22	Zc2	90.87	-175.14
Qs10	48.07	-62.10	Zc3	40.30	-94.38
Qs11	81.42	-73.09	Zc4	111.87	-35.52
Qs12	76.83	-146.91	Zc5	131.20	81.17
Qs13	73.85	-212.14	Zc6	120.76	-33.32
Sx1	97.92	3.81	Zc7	93.18	23.15