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 8

Stability calculation for southern slope (case 1: sliding surface of soft layer).

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	50.00	130.0	18.00	67.00	9,923.20	1.97	5,195
2	40.00	130.0	18.00	59.00	25,567.80	1.97	22,130
3	23.60	130.0	18.00	53.00	26,397.00	1.97	38,531
4	33.79	130.0	18.00	42.00	52,607.00	1.97	63,134
5	20.00	130.0	18.00	7.00	43,800.56	1.97	42,591
6	20.00	130.0	18.00	6.00	42,567.02	1.97	38,610
7	20.00	130.0	18.00	6.00	39,761.90	1.97	34,924
8	20.00	130.0	18.00	6.00	36,404.34	1.97	31,438
9	20.00	130.0	18.00	5.00	33,219.38	1.97	27,460
10	20.00	130.0	18.00	5.00	30,715.70	1.97	23,771
11	20.00	130.0	18.00	5.00	25,617.00	1.97	20,474
12	20.00	130.0	18.00	3.00	23,598.92	1.97	16,372
13	20.00	130.0	18.00	2.00	23,366.98	1.97	11,967
14	20.00	130.0	18.00	2.00	16,503.06	1.97	8,503
15	67.06	130.0	18.00	2.00	32,984.00	1.97	−208