| 单词 | shaft pillar |
| 释义 | > as lemmasshaft pillar shaft pillar n. Mining a body of coal or rock unworked in order to provide support for an adjacent shaft. ΘΚΠ society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > pillar or area of unworked material forbar?15.. pillar1591 whole1728 stalch1747 post1793 stenting1812 rib1818 stook1826 man-of-war1835 spurn1837 staple1839 barrier1849 shaft pillar1855 barrier-pillar1881 stoop1881 stump1881 1855 G. C. Greenwell Pract. Treat. Mine Engin. vi. 155 The situation of coal pits varies so much, together with the position of the seams of coal, dykes and slips, that no rule can be laid down for the form of the pillars of coal, left near the shaft, which are called the shaft pillars. 1929 I. C. F. Statham Winning & Working xxx. 499 This subsidence was not..wholly due to the removal of the shaft pillar, but was partly accounted for by crushing of the shaft pillar in an upper seam. 1977 Irish Press 29 Sept. 8/4 A third semipermanent pillar, known as the shaft pillar, cuts across the orebody from north to south. < as lemmas |
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