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 9

Stability calculation for southern slope (case 2a: fracturing 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	4,104.68	1.63	2,854
2	52.31	0.00	27.00	42.00	69,059.38	1.63	32,534
3	29.20	0.00	27.00	34.00	59,580.81	1.63	48,575
4	43.27	0.00	27.00	45.00	86,640.25	1.63	92,593
5	46.26	0.00	27.00	54.00	92,356.5	1.63	153,653
6	65.18	0.00	27.00	38.00	196,023.8	1.63	206,480
7	72.78	0.00	27.00	33.00	314,633.5	1.63	288,402
8	76.80	0.00	27.00	32.00	361,499.1	1.63	381,918
9	19.02	0.00	27.00	29.00	94,074.96	1.63	394,838
10	73.86	0.00	27.00	29.00	321,295	1.63	462,220
11	64.41	0.00	27.00	2.00	285,943.6	1.63	265,940
12	74.53	0.00	27.00	2.00	286,016.5	1.63	186,018
13	91.41	0.00	27.00	2.00	278,881.9	1.63	108,090
14	94.42	0.00	27.00	2.00	204,797.4	1.63	50,862
15	132.70	0.00	27.00	2.00	174,479.5	1.63	2,108