Experimental Study on Overlying Strata Movement Characteristics and Distributed Optical Fiber Characterization of Stope

Table 2

Parameters of each rock stratum.

Serial number	Lithology	Mean thickness of layers/mm	Density/kg·m^-3	Remark	Serial number	Lithology	Mean thickness of layers/mm	Density/kg·m^-3	Remark
31	Loess	115	1790		15	Mudstone	10	2330
30	Fine sandstone	110	2650		14	Grit stone	50	2560
29	Grit stone	95	2560		13	Sandy mudstone	25	2600
28	Sandy mudstone	10	2600		12	Grit stone	100	2560
27	Fine sandstone	210	2650		11	Sandy mudstone	10	2600
26	Fine sandstone	175	2560	KS7	10	Grit stone	65	2560	KS3
25	Fine sandstone	125	2650	KS6	9	Mudstone	15	2330
24	Sandy mudstone	75	2600		8	Grit stone	45	2560	KS2
23	Fine sandstone	70	2650	KS5	7	Coal	5	1400
22	Mudstone	45	2330		6	Mudstone	25	2330
21	Sandy mudstone	70	2600		5	Grit stone	25	2560	KS1
20	Grit stone	75	2560	KS4	4	Sandy mudstone	20	2600
19	Sandy mudstone	70	2600		3	Coal	10	1400
18	Grit stone	65	2560		2	Grit stone	25	2560
17	Mudstone	45	2330		1	Mudstone	15	2330
16	Grit stone	70	2560		0	No. 6 coal seam	100	1400