释义 |
herringbone timbering herringbone timbering[′her·iŋ‚bōn ¦tim·bə·riŋ] (mining engineering) A method of timber support in a roadway with a weak roof and strong sides, using neither arms nor side uprights; the crossbar is notched into the sides and supported at its center by a bar under it and parallel with the roadway; the bar is supported by struts notched into the sides at about half height. |