摘要
瞬变电磁法具有测距大(150～200m)、对水敏感、定向性好等优点,能够有效探测井下掘进巷道前方隐伏含水异常体,为矿井生产提供地质保障。在勘探实例中,根据井下巷道环境条件和技术要求,消除金属体及非测量电源等干扰因素,并采用偶极装置方式,选择2种规格的发射线圈(2m×2m及1m×1m),在探测巷道距离足够大的情况下,较成功地圈定了老窑采空区及陷落柱的位置、范围、富水性等地质信息,为矿井防治水害提供了依据。
The transient electromagnetic method has strongpoint of larger range （150-200m）, water sensitive and excellent directive property, can effectively detect hidden abnormal water-bearing body ahead of roadway excavation. In a prospecting living example, according to roadway environment and technical requirement, to eliminate interference factors from metal objects and non measuring power, used dipolar setting up, two norms （2m × 2m and 1m × 1m） of transmitting coil were selected. In the case of sufficient prospecting roadway spacing, successfully located gob areas and subsided columns, their extensions and geological information such as water yield property etc., thus provided a foundation to mine water control.
出处
《中国煤田地质》
2006年第3期60-61,共2页
Coal Geology of China
关键词
瞬变电磁法
巷道
超前探测
含水异常体
transient electromagnetic method
roadway excavation.
Leading Prospecting
abnormal water-bearing body
