Coal Seam Hazard Analysis And New Montoring Technology Research

Quite amounts of accidents often occur in mining process. Roof accidents, which are main part of coal mine accidents, have caused great loss and threats to both the country and the people. According to relevant statistics, the death caused by roof accidents accounts for 40%-50% of the whole coal mine fatalities,80% of which occurs in stope and 77.4% occurs during the pressure. Therefore, finding out the causes of the roof accidents and taking effective controlling measures mean a lot to safety production.By Event Tree analysis method, found that whether the monitoring measures of roof is accurate plays a vital role to roof accidents, so strengthening roof monitoring has the important practical significance in safety production in coal mine.Roof pressure can lead to rock bursting. The tiny earthquakes are accompanied phenomenon in rock failure process, which includes a large amount of useful information that are relevant to surrounding rock stress destruction. Using the micro earthquake monitoring system, seismic wave propagation signal can be collected, and according to the features of micro seismic events roof bursting degree can be analyzed and then the features of roof pressure can be achieved. Generally, roof pressure features are analyzed from frequency, density intensity and time of micro earthquake events, and then the forecast of roof pressure is carried on.The development of earthquake monitoring system microprocessor includes three generations, and this paper mainly introduces the third generation. The third generation of micro earthquake monitoring system is based on the sensor network earthquake monitoring system, which can realize the big scope monitoring, establish the remote monitoring stations, and achieve the continuous and dynamic monitoring. Preventing roof accidents make good senses for the roof safety of our country.