CAJ | 학술논문

针对高瓦斯矿井回风巷上隅角悬顶面积过大容易造成瓦斯超限的难题，进行水力压裂控制坚硬顶板回风巷上隅角悬顶面积的井下试验。通过在巷道内布置H型钻孔，并将钻孔间距缩至控制半径的一半，同时采取相邻钻孔错位压裂的措施，结果证明工作面两巷上隅角悬顶面积控制在要求的范围之内，并且对巷道没有产生额外的破坏作用。
침대고와사광정회풍항상우각현정면적과대용역조성와사초한적난제，진행수력압렬공제견경정판회풍항상우각현정면적적정하시험。통과재항도내포치H형찬공，병장찬공간거축지공제반경적일반，동시채취상린찬공착위압렬적조시，결과증명공작면량항상우각현정면적공제재요구적범위지내，병차대항도몰유산생액외적파배작용。
In order to solve the difficult problem of methane overrunning for large hanging roof area at the upper corner in high methane mine, hydro-fracturing was applied to controlling hanging roof area. H-style boreholes were arranged in roadway, space between bore-holes was reduced to half of the controlling diameter, and misalignment hydro-fracturing at adjacent borehole was applied. Practice showed that the area of hanging roof was controlled within requirement without extra failure action.