The Electromagnetic Radiation Method To Predict Coal And Gas Outburst

Coal and gas outburst is a accompanied by sound and violent force can effect themine dynamic phenomena. He is in the ground stress and gas, under the function ofbroken rock and coal gas by the mining of coal or rock space suddenly overflowingphenomenon is a serious threat to a natural disaster to the mine production safety of coalmines. With the increase of mining depth, coal and gas outburst coal and rock dynamicdisaster, such as more serious, highlight the dangers and highlight areas are expanding.So how to prevent such accidents, is urgently needed to solve the problem.This article first laboratory experiment analyzed the mining area coal sampleelectromagnetic radiation characteristics, determined the mining area coal sample cangenerate electromagnetic radiation, and in the process of coal samples under loaddeformation.The electromagnetic radiation intensity and loading stress is closelyrelative to the size of the mechanism is produced through the theoretical analysis of theelectromagnetic radiation and its propagation law in the coal and rock mediumdetermines the coal and rock electromagnetic radiation detection frequency band forfield monitoring index of electromagnetic radiation.Then KBD5and KBD7electromagnetic radiation monitor are introducedrespectively, and the arrangement of measuring points, determine the best place tomonitor antenna using the KBD5electromagnetic radiation monitoring in the minemining coal and rock in the process of tracking test the intensity of electromagneticradiation, and test regular forecasting coal and gas outburst index (borehole gasemission initial speed q cuttings S), found that the intensity of electromagnetic radiationand conventional predictor has a good positive correlation.Test of coal seam thicknessof soft layer, and the intensity of electromagnetic radiation.Coal is soft layer thicknessincreases, the electromagnetic radiation intensity increased.With KBD7electromagneticradiation monitor measured relationship between the electromagnetic radiation intensityof coal seam gas concentration, both are positively related, and the electromagnetic Radiation intensity slightly earlier than the gas concentration changes.Electromagnetic radiation method has effect in advance.With electromagnetic radiationmonitor to monitor the water cut before and after the outburst prevention measures andthe electromagnetic radiation intensity of coal seam in the process of change, findhydraulic electromagnetic radiation intensity is decreased obviously after the cut. Theelectromagnetic radiation method can be used as hydraulic cutting index of outburstprevention measures the effectiveness of a test.Have ascertained electromagnetic radiation law finally, being able to be used toforecast coal and the gas being outstanding.The law making use of blurred identificationlaw to have ascertained electromagnetic radiation forecasts and coal and sensitiveoutstanding gas index and their crisis value, electromagnetic radiance E is6634timeof/ses in order190mv and pulse count N.