Research Article

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 4

Material parameters of the geological model.

Type of layerBulk density (kg/m3)Bulk modulus (MPa)Shear modulus (MPa)Tensile strength (MPa)Cohesion (MPa)Friction angle (°)

Topsoil layer1,80012.55.810.1318
Pliocene layer2,3001,3901,0401.82.324
Upper coal and rock layer1,5004,7803,7408.71.3227
Coalbed no. 61,5004,7803,7408.71.3227
Middle coal and rock layer1,5004,7803,7408.71.3227
Mudstone layer2,2001,3901,0001.52.021
Lower coal and rock layer1,5004,7803,7408.71.3227
Conglomerate layer2,6007,5506,1401.878.5637
Coal mass fracture layer0000015