DOI: 10.11799/ce202510005
Layout method of hydraulic fracturing in bedding horizontal boreholes in thick-hard roof strata
GAO Fuquan
HAN Lingchen
GAO Quanwu
XIE Fei
SUN Ruda
Abstract：To address the risk of dynamic disasters caused by thick hard roof rupture during mining,we took the 11-3107 working face of Menkeqing Coal Mine as the engineering background,and comprehensively applied research methods such as theoretical analysis,numerical simulation and on-site practice to explore the layout method of bedding horizontal boreholes for regional fracturing in thick hard roof strata.Firstly,according to the multi-dimensional analysis including roof lithology analysis,key strata identification,energy transfer research and microseismic monitoring,there are key strata Ⅰ,Ⅱ and Ⅲ in the overburden of the No.3107 working face,the rupture of which result in high energy transfer to the coal mass.Therefore,the preferred fracturing horizons should be the middle-low position(15～30 m)and the middle-high position(45～60 m),which need to be dynamically adjusted.Then,numerical simulation was used to analyze water injection leakage within different mining-induced damage ranges,so as to determine the horizontal borehole layout parameters.Meanwhile,the effect of roof pre-splitting blasting was evaluated.Based on the above research,a targeted regional fracturing scheme for the No.3107 working face was proposed,which provides a solid technical support for the subsequent safe and efficient mining of the working face.
Keywords：rockbursthydraulic fracturingbedding boreholeboreholes layoutkey strata
Publication Date：2025-10-20
Online Publishing Date：2025-11-18(First online date of this platform, not the publication date of the document)
Pages：9( 37-45 )