传感器安装方式对巷道微震信号时域特征影响分析
Influence analysis of sensor installation method on the time-domain characteristics of microseismic signals in roadway
陈付德 1王承来 2夏辉 1田佳豪 2张爱华 1张明伟 2田壮才2
作者信息
- 1. 中煤新集能源股份有限公司新集二矿,安徽淮南 232001
- 2. 中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州 221116
- 折叠
摘要
在新集二矿230106工作面机巷使用全锚固锚杆刚性连接与钻孔注浆黏连岩壁两种方式安装微震传感器,并进行为期一周的微震试验,共采集到553个微震事件,对比分析微震信号时域特征.研究发现,使用锚杆方式安装的传感器接收到的微震信号最大幅值均显著大于使用钻孔方式安装的传感器,最大幅值平均约为钻孔方式安装传感器的2.86倍.锚杆方式安装的传感器接受的有效信号持续时间长度均大于钻孔方式安装的传感器,有效信号长度平均约为钻孔方式安装的4.41倍,表明锚杆与传感器耦合效果要优于钻孔与传感器,更有利于数据处理和分析.使用锚杆安装传感器捕获信号的峰值、均方根值、裕度因子和脉冲因子均大于钻孔安装的传感器,表明使用锚杆安装的传感器捕获信号极端变化程度以及能量更高,可以提供更多微震信号识别的依据.因此,采用锚杆方式安装的传感器获得的信号具有有效信号幅值大、持时长、特征值明显等特点,信号质量相比于钻孔方式安装更高.
Abstract
Two methods were used to install microseismic sensors in roadway of Xinji No.2 Mine,namely the rigid connection installation of fully anchored anchor rods and the installation of drilling grouting adhesive rock walls.A week long microseismic test was conducted,and a total of 553 microseismic events were collected to compare and analyze the time-domain characteristics of microseismic signals.Research had found that the maximum amplitude of microseismic signals received by sensors installed using anchor rods was significantly greater than that of sensors installed using drilling methods,with the average maximum amplitude being about 2.86 times that of sensors installed using drilling methods.The effective signal duration received by sensors installed with anchor rods was longer than that of sensors installed with drilling,and the average effective signal segment length was about 4.41 times that of sensors installed with drilling,indicating that the coupling effect between anchor rods and sensors was better than that of sensors installed with drilling,which was more conducive to data processing and analysis.The peak value,root mean square value,margin factor,and pulse factor of the signal captured by the sensor installed on the anchor rod were all greater than those of the sensor installed on the drill hole,indicating that the sensor installed on the anchor rod had a higher degree of extreme change and energy intensity in capturing the signal,which could provide more basis for identifying microseismic signals.Therefore,the signals obtained from sensors installed with anchor rods had the characteristics of large effective signal amplitude,long duration,and obvious eigenvalues,and the signal quality was higher than that of drilling installation.
关键词
微震传感器/安装/幅值/持时/时域/特征值Key words
microseismic sensors/installation/amplitude/duration/time-domain/characteristic value引用本文复制引用
基金项目
山东省煤田地质规划勘察研究院开放课题(SDMTKCY-2022-09)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据