DOI: 10.11799/ce202504011
Research on strong mine pressure behavior and the control technology in an extra-thick coal seam working face
LI Jiang
ZHAO Bin
Abstract：To address the problem of strong mine pressure behavior in the extra-thick coal seam working face,taking the 61607 working face of Longwanggou Coal Mine as the engineering background,the characteristics of strong mining pressure behavior and the distribution law of mining stress were systematically analyzed through theoretical calculation and on-site measurement.Based on this,a control measure combining conventional hydraulic fracturing and directional drilling hydraulic fracturing was proposed.The results showed that the influence range of advance abutment pressure in the working face was about 140 m,the distance between the peak point of abutment pressure and the coal wall is about 50 m,the disturbance caused by mining reached 200 m above the floor.During the mining process,the weighting intensity was high,and the phenomenon of roof shaking was frequent.The working resistance of the support could reach 51.5 MPa,after adopting the roof pre-cracking in the working face,the parameters such as cyclic weighting interval and weighting duration decreased by 26.05%and 41.56%,respectively.Microseismic events also show a clear distribution pattern of"high frequency+low energy",with significant effects,it can provide reference significance for exploring strong mining pressure control technology for similar mines in the surrounding area.
Keywords：extra-thick coal seamstrong mine pressure behaviormine earthquakehydraulic fracturingeffect test
Publication Date：2025-04-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 75-81 )