Research on Electromagnetic Radiation Testing Technology for Coal Rock in Anshun Coal Mine
With the deepening of mining depth in Anshun Coal Mine,the danger of abnormal dynamic disasters occurring during stoping in the working face is significantly increased.To prevent disasters and accidents,based on the correlation between electromagnetic radiation intensity and coal rock damage during the loading and failure process of coal rock,an electromagnetic radiometer can be used to test the damage and failure status of coal and rock masses,predict the danger of dynamic disaster accidents in coal and rock masses.By setting the No.3 mining area track downhill and the No.4 mining area track air door at 0-300 m as control groups,the coal rock electromagnetic radiation testing on three downhill excavation roadways in the No.4 mining area:track,return air,and tape is conducted,and analyze the regularity of the monitoring data.The research results indicate that excavation operations seriously affect the stress distribution and coal rock failure state inside the roadway,the stress disturbance is more pronounced near the excavation point,the impact on roadways with deeper excavation and stable support is relatively small;The electromagnetic radiation intensity of coal rock in the danger zone of the roadway is relatively high;When there is a fault,the electromagnetic radiation signal around the fault is strong;The stress disturbance situation in excavation coal roadways is more stable than that in rock roadways,and the stress is generally smaller.
coal and rock massdynamic disasterelectromagnetic radiationstress distribution
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