摘要
利用煤岩动力灾害监测系统(ZDKT-1型)对平煤十矿10次爆破作业进行实时监测,分析煤岩体在动力扰动下破坏失稳的电磁及微震信号特征,并探究两类信号的耦合关系.研究结果发现:煤矿井下电磁和微震背景噪声为具有多个主频的宽频扰动,且不严格符合50 Hz的倍频;爆破作业电磁信号存在明显脉冲特性,单边幅值在14 mV左右;而微震信号波形为更具对称性的简谐振动,单边幅值也明显大于电磁信号;爆破掘进现场的电磁和微震信号在时间上具有很好的同步性;电磁和微震信号能量符合较好的线性关系,拟合相关性系数达0.966.
The dynamic disasters danger of 10 times blasting process were monitored by using coal or rock dynamic disaster monitoring system（ ZDKT-1）. We analyzed the characteristics of electromagnetic and microseismic signals during cracking process of coal or rock with dynamic disturbance. And explored the relationship between the two types of signal. The results show that microseismic and electromagnetic background noise in coal mine having a plurality of frequency broadband disturbance,and are not strictly in accordance with 50 Hz frequency or its doubling. The electromagnetic signals have obvious pulse characteristic,amplitude of about 14 m V. The microseismic signals are obvious harmonic vibration with symmetry,amplitude of about 100 m V. Electromagnetic and microseismic signals in the dissertation showed good synchronicity in time. The energies of electromagnetic and microseismic signals in the dissertation conform to the linear relationship. The fitting parameters were greater than 0.966.
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2017年第6期891-897,共7页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(51604083)
福建省自然科学基金资助项目(2015J01200)
关键词
爆破掘进
动力扰动
电磁
微震
煤体破裂
blasting excavation
dynamic disturbance
electromagnetic
microseismic
coal fracture
