摘要
为了研究煤层风氧化带的槽波响应特征,建立包含煤层风氧化带的工作面三维层状模型,对波场模拟结果进行分析,采用槽波速度和振幅衰减系数CT成像方法实现了对煤层风氧化带的探测,并在王洼二矿215041工作面开展现场实验。结果表明:煤层风氧化带的槽波响应特征为槽波速度与主频升高、振幅能量衰减,以速度和振幅衰减系数的槽波CT成像方法可以实现对煤层风氧化带的探测;现场实验中槽波振幅能量衰减系数CT成像方法准确率为93.3%,探测精度高于槽波速度CT成像方法。
In order to study the channel wave response characteristics of the coal seam wind oxidation zone,a three-dimensional layered model of the working face containing the coal seam wind oxidation zone was established,and the wave field simulation results were analyzed.The channel wave velocity and amplitude attenuation coefficient CT imaging method was used to realize the detection of the coal seam wind oxidation zone,and the field experiment was carried out in the 215041 working face of Wangwa No.2 coal mine.The results show that the channel wave response characteristics of the coal seam wind oxidation zone are the increase of channel wave velocity and main frequency and the attenuation of amplitude energy.The channel wave CT imaging method with velocity and amplitude attenuation coefficient can realize the detection of the coal seam wind oxidation zone.In the field experiment,the accuracy of the channel wave amplitude energy attenuation coefficient CT imaging method is 93.3%,and the detection accuracy is higher than that of the channel wave velocity CT imaging method.
作者
刘硕
LIU Shuo(China Coal Technology and Engineering Group Xi'an Research Institute(Group)Co.,Ltd.,Xi'an 710077,China)
出处
《煤炭技术》
CAS
2024年第3期91-95,共5页
Coal Technology
基金
国家自然科学基金面上资助项目(42074175)
陕西省自然科学基础研究计划资助项目(2020JQ-741,2021JQ-949)。
关键词
煤层风氧化带
槽波响应特征
槽波速度CT成像方法
槽波振幅衰减系数CT成像方法
coal seam wind oxidation zone
channel wave response characteristics
channel wave velocity CT imaging method
amplitude attenuation coefficient CT imaging method of channel wave
