… -cracks, fractures, and dissolved pore and cave. We compared different velocityprediction
models, … , and Kuster-Toksöz model, trying to find the best one to predict P-velocity (VP) and S-…

… velocity, which is the average velocity in the actual pores or channels of the medium. Since,
the gob material in the caved … the predicted permeability of gob material composed of broken …

… we also derive predictive … modeling. These examples highlight the efficacy of BP-ANNs as
a means of obtaining multivariate, nonlinear models for difficult problems such as permeability …

… the fracture velocity distributions for different fracture-cave … prediction model. Its rationality is
illustrated as follows. First, … metric to evaluate the permeability of fractured karst reservoirs. A …

… assessment of the characteristics of gas flow in goaf areas. Good estimates of the porosity and
permeability in goaf areas are essential to predict … permeability than intact or fractured rock…

… fracture systems and predicting their permeability. The only practical way to compare the
predictive accuracy of each method is to evaluate the … from both sides, and if the velocity is in …

… low permeability, whereas the fracture has high permeability … coverage in predicting pressure
changes in fractured mediums… -velocity flow in both the fracture and formation. Such high-…

… The prediction accuracy of neural network is evaluated … the influence of natural cave
permeability on fracturing curve. … is chosen randomly, the convergence speed is relatively low …

… Effectiveness evaluation of the prediction models and an … The water velocity in the
fractures was greater than that in … , and the aperture of the fractures and fracture permeability …

… Here, we review recent advances in fractured rock research … permeable fracture zones and
(b) measuring and predicting the … Multiple logs were run, borehole deviation, sonic velocity, …