Construction Technology of Mining District Ore Chute in Unfavorable Stratum under High Stress
ZHENG Jian-xin
ZHAO Ming-xiang
ZHANG Jun-wen
JIANG Song-bai
Abstract：The ore chute length of 1 340 m middle section is 87.2 m in Longshou Mine ,the chute sec‐tion is circular ,the net diameter 3 m. In consideration of the chute cross section is small ,and arranged in high stress rock mining area ,the engineering construction is very difficult. Through the integrated study of the chute construction conditions and actual situation ,the chute construction mechanization e‐quipment is assorted reasonably. Using smooth blasting ,short dig short ,temporary shotcrete ,express the flexible support at a time and secondary concrete and steel plate supporting integrated technology such as rigidity innovatively. The technical challenge in construction of small diameter chute dig build by laying bricks or stones in bad high stress rock is solved greatly ,has obtained the good actual effect.
Keywords：unfavorable stratum under high stressore chutereasonable supporting mechanizationshort distance excavating and short distance supporting
Publication Date：2015-11-16
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 72-76,71 )