Recently, application of demolition technique develops in the world and researches around the field is continued widely. Safety is one of the main aspects of a demolition operation, such as fly rock or throw control of crushed materials in drilling and blasting zones of structures. In this research has been tried to survey of the process in brick structures and a physical model with actual scale (1:1) has been built. The model was demolished by a suitable drilling and blasting pattern with three different covering textiles. Based on the experience and statistical analysis has been suggested a nonlinear model with three independent parameters such as distance, charge per delay and maximum tensile capacity of the textiles. The model which it has been obtained by nonlinear regression has coefficient correlation equal to 0.88 and confidence level with 95%. A cross check graph has been drawn to compare of calculated values and measured values and the results show the suggested model has a high precision to predict of particle mass throw.