DOI: 10.11799/ce202602011
Research on fracture propagation effectiveness in hydraulic fracturing of thick-hard roof strata using surface microseismic monitoring
YAO Zitao
LU Chuang
WANG Binchang
YANG Guangyu
ZHANG Chenyang
Abstract：The fracture propagation effect in thick-hard roof strata during hydraulic fracturing is critical for evaluating the technology's effectiveness in preventing rock bursts.Taking the hydraulic fracturing operation in the thick-hard roof strata of the 20101 working face as an engineering case study,we investigated the fracture propagation through surface microseismic monitoring and the small-volume covering ellipsoid method.The results demonstrate that:Firstly,within the total fracturing length of 1000 m,a total of 1255 microseismic events were monitored.The fracture propagation range is positively correlated with the volume of fracturing fluid used but unrelated to the fracturing operation time.As the number of microseismic events increases,the fracture propagation range in the thick-hard rock layer expands.Secondly,centered on the horizontal well,the average radii of hydraulic fractures in the north-south horizontal direction,east-west horizontal direction,and vertical direction are 127 m,71 m,and 31 m,respectively.The stimulated reservoir volume(SRV)after hydraulic fracturing of the thick-hard rock layer is 371.2×104 m3.Thirdly,the water discharge observed at the underground drainage borehole sites is generally consistent with the fracture propagation results from surface microseismic monitoring.These findings confirm that surface microseismic monitoring technology is effective to evaluate the fracture propagation effectiveness of hydraulic fracturing,providing a scientific basis for fracture assessment and rockburst prevention effect analysis under similar conditions.
Keywords：hydraulic fracturingmicroseismic monitoringfracture propagationthick-hard rock stratarock burst
Publication Date：2026-02-20
Online Publishing Date：2026-03-23(First online date of this platform, not the publication date of the document)
Pages：8( 85-92 )