| Chinese coal mine water-inrush accidents many are due to water-insrush form coal floor. Many coal mines are suffering threats from confined water, especially North China coal field, how to prevent and control water hazard to ensure safe stoping of these coal resources is a serious problem.Prediction of water-inrush from floor is still difficult to determine the expression to represent, water-inrush is relation to a number of factors. But if summing water inrush prediction methods up reasonablely, and consulting specialized experts in this research work, then applying the reasonable inference method, it can give elementary judgement that has some confidence. Prediction is one of effective ways to prevent and control water hazard, is also the important part of evaluating water hazard.The following work is completed in this paper.1) Analyzing six main impacting factors of water-inrush from coal floor, finding out the main entry point of predicting and preventing and curing water-inrush from floor; Summarizing water-inrush mechanism from coal floor, analyzing water-inrush types classification scheme, finding out theoretical basis of predicting water-inrush from floor and fundamental starting orientation.2) Summing existing water inrush prediction methods up reasonablely, and giving each water inflow prediction of them in water-rush case, it can enrich prevention and control basis. Besides,making use of D-S evidence theory as secondary decision-making method to apply in predicting water-inrush from floor,it can make prediction result accurately, crediblely. Based on both developing "JPSWF".3) Using the system in engineering practice, it can prevent and control water hazard of 121101 working face in Liu zhuang Coal mine according to three steps of exploring hydrogeology conditions, evaluating water hazard and preventing and controling water hazard, and give measures and propositions ofprevention and contol to ensure safe stoping. |
PDF Full Text Request