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理论分析了水对煤体物理力学性质和煤体电磁辐射信号影响的规律。煤层注水过程中由于压力水对注水钻孔周围煤体的压裂,煤体产生的电磁辐射值增大,煤层注水结束后,煤体弹性得以充分释放,电磁辐射值比注水前相对降低。探讨了现场采用电磁辐射监测煤层注水防突效果的实施方案。研究结果表明:电磁辐射法可以用来监控煤层注水过程以及检测煤层注水防治煤与瓦斯突出效果。
Theoretical analysis of the water on the physical and mechanical properties of coal and electromagnetic radiation signal law. Due to the fracturing of the coal around the water injection borehole due to pressure water during coal seam waterflooding, the electromagnetic radiation generated by the coal body increases. After the water injection at the coal seam, the elastic body of coal is fully released and the electromagnetic radiation is relatively lower than before injection. This paper discusses the implementation scheme of using electromagnetic radiation to monitor outburst prevention effect of coal seam water injection on site. The results show that the electromagnetic radiation method can be used to monitor the water injection process of coal seam and detect the water injection of coal seam to prevent coal and gas outburst.