Study on the Dynamic Damage Evolution during Coal Seam Pulse Water Infusion

Article history: Received: 18.6.2015. Received in revised form: 29.11.2015. Accepted: 1.12.2015. Dynamic damage evolution during coal seam pulse water infusion is simulated through secondary development of ABAQUS software in this paper in order to obtain the rule of dynamic damage evolution of coal seam around the pulse water infusion hole. It provides a new quantitative method of determining coal seam pulse water infusion parameters and location. Therefore, the effect of different parameters of pulse water infusion on dynamic damage evolution of coal around the infusion hole was analyzed and numerical simulation results show that the quantity of coal damage is significantly increased by increasing water infusion frequency under constant water infusion pressure and time rate. Based on these research results, the rule of accurate dynamic damage field distribution around water infusion holes was obtained. It provides, thus, a theoretical basis for both optimizing technological pulse water infusion parameter design and raising water infusion effect.