Study on the Strata Movement Rule of the Ultrathick and Weak Cementation Overburden in Deep Mining by Similar Material Simulation: A Case Study in China

Table 2

Stratigraphic characteristics of some deep mining areas in Dongsheng coalfield.

Stratum			Yingpanhao	Bayan Gaole	Nalinhe-2
System		Formation	Thickness (m)
Quaternary	Holocence		45.72–123.61 86.41	73.92–161.60 118.74	49.38–83.84 65.56
		Upper pleistocene				Malan formation
	Cretaceous	Zhidan group					253.04–429.91 347.77	104.46–255.88 178.67	53.88–279.08 138.31
Jurassic (chief coal-bearing strata)		Anding formation	50.9–134.80 94.66	35.90–157.29 96.60	67.53–154.53 103.15
		Zhiluo formation	126.26–229.34 169.72	71.12.00–238.60 154.86	111.92–199.34 151.44
	Lower and middle Jurassic	Yan'an formation	307.80–393.14 355.07	208.67–312.28 260.47	334.32–365.30 349.81