航空重力探测目标发现率研究

Study on target detectable rate of airborne gravity exploration

航空重力测量相比地面测量可快速地完成区域性的重力数据采集。为在发现异常目标体的同时,高效、安全地完成航空重力测量,作者提出了一种新的目标体发现率的评价方式,指导最优化测量参数设计。通过可靠弱异常的判定标准定义目标体可发现的临界条件,确定目标体可发现概率。通过理论模型分析目标体参数(埋深、水平尺寸等)、测网间距和飞行高度对发现率的影响。绘制目标体发现率关于飞行高度、测线距和测点距的三维图像。

Airborne gravity exploration acquires regional gravity data faster than ground survey does.In order to detect the target＇s anomaly and acquire airborne gravity data effectively and safely,we purposed a new assessment of target detection rate,and it can be used to instruct the optimal survey parameter design.We apply the criterion of reliable anomaly to define the critical standard of target detection,and define target detection probability.We analyze the influence to target detection rate of target parameters,including depth,horizontal size and others.We plot the 3D map of target detective probability with respect to flight height,survey lines spacing and station spacing.