东北大学15春学期《采煤学(二)》在线作业3（15 spring semester of Northeastern University, coal mining (two) online homework 3）.docVIP

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东北大学15春学期《采煤学(二)》在线作业3（15 spring semester of Northeastern University, coal mining (two) online homework 3）.doc

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东北大学15春学期《采煤学(二)》在线作业3（15 spring semester of Northeastern University, coal mining (two) online homework 3）

东北大学15春学期《采煤学(二)》在线作业3（15 spring semester of Northeastern University, coal mining (two) online homework 3） br / Mining 15 spring semester (two) online homework 3br / br / br / br / br / A, (a total of 5 multiple-choice questions, a total of 25 points.) br / br / 1., what are the factors associated with the transport capacity of a single car? (br): The running speed of br / A. br / br / B. distance br / The rate of br / C.. br / D. br / Load Capacity Answer: *****br / 2. when the deep hole blasting is carried out in the open pit mine, how many kinds of holes can be divided into? (br): A. single row br / br / br / B. double hole br / C. multi row hole rectangular net br / br / D. multi row hole triangulation br / Answer: *****br / 3. which of the following punch holes can be used to punch holes? (br): A. br / hoisting type impact drill br / br / B. DTH Drill br / br / C. rotary drilling rig br / br / D. rotary drilling rig Answer: *****br / 4. what are the modes of transportation in the open pit? (br): A. br / automobile transportation br / B. br / belt conveyor br / br / C. railway transport br / D. br: hydraulic transport Answer: *****br / 5. which of the following several operation modes is excavator operation mode? (br): A. car br / paperback br / The car is br / B. br / C. cut br / br / D. br / dig Answer: *****br / br / br / br / br / br / Mining 15 spring semester (two) online homework 3br / br / br / br / br / Two, the judgment question (altogether 15 test questions, altogether 75 points) br / br / 1. deep hole blasting preparation work is more complex, energy consumption. (br): br / A. error B. br / Answer: *****br / 2. ore dilution may reduce the difficulty of ore washing. (br): br / A. error B. br / Answer: *****br / 3. hydraulic shovels are usually used as main mining equipment only in large and medium-sized open pit mines. (br): br / A. error B. br / Answer: *****br / The 4. row of soil work is the last