| 释义 |
stoping, vbl. n.|ˈstəʊpɪŋ|
[f. stope v. + -ing1.]
a. The action of the verb stope.
1778W. Pryce Min. Cornub. 97 When met with in stopeing, or driving as aforesaid, they commonly say, ‘It is a stope of dead ground.’ 1903Westm. Gaz. 16 Sept. 9/1 We have good reason to believe that actual stopings..will expose a much larger amount than can now be seen.
attrib.1877Raymond Statist. Mines & Mining 320 Besides this, stoping ground for 10 men is opened. 1884Knight Dict. Mech. Suppl. 868/1 Stoping Drill (Mining.) One for excavating drifts or horizontally lying beds or steps [etc.].
b. Geol. The process by which intruding magma detaches blocks of the surrounding rock.
1903R. A. Daly in Amer. Jrnl. Sci. CLXV. 272 (heading) The hypothesis of overhead stoping† by deep-seated magmas. [Note] † A technical mining term meaning to excavate upwards or sideways to remove ore. 1903― in Bull. U.S. Geol. Surv. No. 209. 102 Magmatic stoping would tend to weaken the earth's crust immediately above the intruding body. 1939Bailey & Weir Introd. Geol. xlii. 237 On the whole, stoping is probably the most important method of emplacement. 1977A. Hallam Planet Earth 69/1 Intrusions are emplaced in various ways: for example,..by stoping, a process of gradual movement involving the dislodging of the blocks of country rock and their incorporation—perhaps even assimilation—into the magma. |