东大15秋学期《采矿学(下)》在线作业1（East 15 autumn semester, mining (next) online homework 1）.doc

东大15秋学期《采矿学(下)》在线作业1（East 15 autumn semester, mining (next) online homework 1） Austrian Peng answer, East 15 grand autumn semester mining (next) online homework 1 Total score: 100 test time: - Radio examination A multiple-choice question Judgment question Radio examination questions (10 questions, 30 points) One Refers to the ratio of rock to volume of a horizontal layer in the open pit. A. average stripping ratio B. stripping ratio C. production stripping ratio D. delamination stripping ratio Full marks: 3 Two The transportation of motor vehicles is flexible, flexible and can be operated in complex rock arrangement sites. A. reasonable distance B. climbing capacity C. deadweight D. trunk volume Full marks: 3 Three The length of a work line to be mined by a mining device is called. A. mining length Length of B. mining area C. theoretical length D. actual length Full marks: 3 Four Solid state non energy minerals can be divided into non metallic minerals according to their characteristics. A. metal B. minerals C. polymetallic mineral resources D. metal minerals Full marks: 3 Five The characteristics of pre splitting blasting are: drilling, blasting, volley. A. coupling charge B. doesnt charge C. multi charge D. less loaded Full marks: 3 Six The instantaneous stripping ratio is called breakeven when the profit increment is zero. A. average stripping ratio B. stripping ratio C. production stripping ratio D. economic stripping ratio Full marks: 3 Seven The so-called explosion zone in any one of the hole blasting, in space are in accordance with a certain order of initiation blasting alone blasting technology. A. continuous detonation B. row initiation C. wave initiation D. hole by hole detonation Full marks: 3 Eight The imaginary angle between the inclined surface and the horizontal plane into the top face of a work bench in the next work along with the steps of the slope of the bottom line, called. A. final help slope angle B. slope angle C. work slope angle D. working