Modeling Rock Fracture Propagation and Water Inrush Mechanisms in Underground Coal Mine

Figure 9

FRACOD models used for investigating the effect of the collapse column in the Luotuoshan mine. The collapse column has no fixed boundary but has random and fully saturated cracks. The monitoring lines Lv1~4 are vertical and are located between the collapse column and the working face of the roadway, and monitoring lines Lh1~4 are horizontal and are beneath the roadway. The inner boundary of the roadway is stress free. The bottom boundary of the model is a displacement boundary, and both sides are roller boundaries.