Prediction of coal face rockbursts and microseismicity in deep longwall coal mining

摘要: A new method is proposed for predicting rockbursts, as well microseismicity in deep longwall coal mining. The able to predict failure the seam and rock mass by using 3-D elastic numerical stress analyses. These locations were compared with results of microseismic monitoring. Fracturing intensity its variation respect face advance represented maximum shear seismic moment release rate. “Seismic Moment Method” was applied three cases Horonai Coal Mine Miike Mine, Japan. first case considered panels W8-5U WS-5 at 1055 1125m deep. Even though no rockburst occurred, areas where events concentrated predicted. It also clear, comparing calculated rate observed data, that magnitude seismicity successfully second corresponded panel W6-3 same mine from 915 985m Microseismic monitoring had not yet been introduced, however, this predicted fracturing elements face. last E3–E6 600 650 m deep, respectively. location again predicted; addition, toppling rockbursts Relations between extent relief zone ahead occurrence are discussed. An effective prevent hazard proposed.