Effect of Coalbed Methane Well Fracturing on Slope Stability of Open-Pit Coal Mine: A Case Study of Shengli East No. 2 Open-Pit Coal Mine

Table 10

Stability calculation for southern slope (case 2b: sliding surface of 6# coal seam).

No. of sliding blocks	Length of sliding section Li (m)	Cohesion Ci (kPa)	Internal friction angle ψi (°)	Inclination of sliding surface αi (°)	Self-weight of sliding body (kN)	Stability coefficient Ks	Residual sliding force Ei (kN)
1	90.28	0.00	27.00	59.00	4,264.60	1.62	2,965
2	52.31	0.00	27.00	42.00	71,750.00	1.62	33,802
3	29.20	0.00	27.00	34.00	61,902.14	1.62	50,468
4	43.27	0.00	27.00	45.00	90,015.84	1.62	96,201
5	46.26	0.00	27.00	54.00	95,954.81	1.62	159,639
6	65.18	0.00	27.00	38.00	203,661.12	1.62	214,525
7	72.78	0.00	27.00	33.00	326,891.96	1.62	299,638
8	76.80	0.00	27.00	32.00	375,583.44	1.62	396,798
9	19.02	0.00	27.00	29.00	97,740.22	1.62	410,221
10	73.86	0.00	27.00	29.00	333,812.99	1.62	480,229
11	64.41	0.00	27.00	2.00	297,084.23	1.62	276,301
12	74.53	0.00	27.00	2.00	297,160.01	1.62	193,265
13	91.41	0.00	27.00	2.00	289,747.47	1.62	112,301
14	94.42	0.00	27.00	2.00	212,776.48	1.62	52,844
15	132.70	0.00	27.00	2.00	181,277.42	1.62	2,190