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Abstract This paper describes the principle and method about using radio wave tunnel penetration method to evaluate fracturing effect,and presents area method for quantitative evaluation.In the case of sounding data of 3211S working surface of the Songzao coal mine,the author developed comparative research on radio wave attenuation coefficient contour maps before and after fracture.Area quantitative evaluation method put forward in this paper was used for quantitative evaluation of fracturing effect of 3211S working surface.In addition,fault geological data exposed by tunnel verified the reliability and accuracy of using area quantitative evaluation method.This evaluation method can effectively guide reasonable layout of two supplementary hydraulic fracturing holes,and optimize construction design scheme of coal seams hydraulic fracturing.Moreover,it can save a lot of design and construction cost,and produce good economic and social benefits.Radio wave tunnel penetration method has many advantages,such as maturity of geophysical method, simplicity of operator,portable instrument,and high accuracy of detection results.This method has been used to evaluate fracturing effect of mining faces of the same coal seam in underground coal mine and obtained good results.Hence it is worthy of popularization and application.
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Received: 31 October 2016
Published: 20 August 2017
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