用地质雷达测试围岩松动圈的原理与实践

Principle of Measuring Broken Rock Zone Around Underground Roadway with GPR and Its Application

论述了用地质雷达测试巷道围岩松动圈的原理 ,提出了松动圈的实测方法 ,并在煤矿综采放顶煤工作面顺槽中进行了测试实践 .测试获得了整个巷道断面松动圈的分布 。

By discussing the principle of measuring the broken rock zone (BRZ) with GPR, a new measuring method of the BRZ was proposed. This method has been used to measure the broken zon around the haulage gateways of two top coal caving faces in a coalmine,and a detailed distributing extent of the BRZ was obtained. Some major characteristics of the BRZ, such as the thickness of BRZ is different in different places at the same cross section, were worked out from the measured results.