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声发射监测工艺技术是能否准确监测煤矿动力灾害的关键技术。通过数值模拟和实验室实验的方法对波导器的直径和长度进行了优化,同时利用现场考察的方式对不同长度、直径波导器接收AE信号的效果进行了考察,确定波导器的直径为20 mm、长度应大于巷道破碎圈宽度。利用现场考察的方式对波导器的安装工艺进行了确定,波导器距离掘进工作面的距离应保持在6～25 m范围内;波导器迎向巷道掘进方向,安装仰角处于3～20°之间较为合理;波导器接收AE信号端位于破碎圈以外的原始应力区、波导器用软性材料穿套及传感器用弹性套筒保护等可以起到良好的阻噪作用。
Acoustic emission monitoring technology is the key technology to accurately monitor coal mine disaster. The diameter and length of the waveguide were optimized by numerical simulation and laboratory experiments. The effects of AE signals received by different length and diameter waveguides were investigated by on-the-spot investigation. The diameter of the waveguide was determined to be 20 mm , The length should be greater than the width of roadway broken ring. The method of on-the-spot investigation was adopted to determine the installation process of the waveguide. The distance between the waveguide and the heading face should be kept in the range of 6-25 m. The waveguide should face the direction of roadway excavation and the elevation should be between 3 and 20 ° It is more reasonable; the wave guide receives the AE signal end in the original stress area outside the broken ring, the waveguide can wear good with a soft material and the sensor can be protected by a flexible sleeve, which can play a good role in noise resistance.