DOI: 10.11799/ce201801016
Study and application of influence law of coal seam hydraulic fracturing on rock movement
FU Jun-hui
Abstract：Physical simulation test is used to study the influence of hydraulic fracturing of coal seam on roof rupture and instability.The physical simulation tests show that length of the immediate roof step after hydraulic fracturing becomes shorter,and the immediate roof is relatively broken,and no strong roof weighting appears;after fracturing,the periodical breaking instability of main roof appears earlier,and the old roof breaking interval shortens,and the hard roof is weakened to ease the impact of rock burst.The field fracturing test was carried out in Dayang Mine.The field test results show that,after fracturing,weighting interval of the roof is reduced by 23.24％,the top coal cavability is improved,the arch structure caused by insufficient top coal caving top coal is reduced,and the working face recovery rate is increased.The study has an important reference value for hydraulic fracturing of top coal(slab).
Keywords：coal seam hydraulic fracturingstrata movementmine pressure behaviorphysical simulation
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 56-59 )