To identify the correspondence between different dynamic responses of Daguangbao landslide and faulting mechanisms composite-hypocenter, whole hypocenter Wenchuan earthquake was divided into four sub-hypocenters. On another hand, based on location Dauangbao landslide, composite-hypocenter Initial Sub-hypocenter, Approaching Local Receding sub-hypocenter Terminal sub-hypocenter. Subsequently, re...

Numerical simulation is very useful for understanding the hydraulic fracture (HF) re-orientation mechanism from artificial weaknesses. In this paper, UDEC T-W (Trigon–Weibull distribution) modeling method adopted to simulate fracturing process in heterogeneous rocks. First, reliability of validated against previous laboratory experiments and numerical simulations. Then effects fluid rate, visco...

The overlying strata layers of coal workfaces with karst aquifer water normally causes serious safety problems due to the precipitation, drainage and inrush, such as a wide range long term surface subsidence. In this study, by taking 10,301 working faces Daojiao mine in Guizhou Province engineering background, numerical model water-bearing fluid-solid coupling was established using UDEC illustr...

this study aims at presenting a numerical model for predicting grout flow and penetration length into the jointed rock mass using universal distinct element code (udec). the numerical model is validated using practical data and analytical method for grouting process. input data for the modeling, including geomechanical parameters along with grout properties, were obtained from a case study. the...

Rock burst is one of the most serious risks for underground coal mines, and associated dynamic waves generally cause roof falls large-scale shrinkage roadway. The roadway often seriously damaged by duplicated rock bursts. Previous research on propagation attenuation shock cannot explain well failure mechanisms surrounding under waves. To fill this gap, paper presents comprehensive fracturing pr...

There are a large number of karst caves in the limestone rock strata mining area, and water seriously restricts safe efficient recovery coal resources. In order to reveal influence law on evolution water-conducting fissures seam mining, numerical simulation method UDEC software is employed analyze development characteristics under conditions different sizes. By comparing analyzing overlying dis...