Study on Prediction of Water Inrush in Mine by Microseismic Technique

In this paper a new forecast approach of coal mine water inrush based on microseismic monitoring technique was introduced. Coal rock microseismic signal was characterized by wide frequency band and rich frequency spectrum, so that microseismic monitoring technique could be used to detect the dynamical changes of coal rock and therefore it was possible to predict water inrush in mine by analyzing the dynamical changes. In this paper we analyze various factors affecting microseismic location precision. Therefore, a high-precision microseismic monitoring technique for coal floor water inrush is proposed. Through microseismic monitoring experiments to watery coal, the typical microseismic signal reflecting the characteristics of coal breakage has been obtained. The above study is helpful to further promote the research work for forecasting the coal mine water inrush.