heading and bench mining 下向梯段式回采
bench mining method [矿业] 台阶式采煤法
surface bench mining 露天台阶开采
open bench mining 露天台阶式开采
high bench mining 高台阶开采
high-bench mining 高台阶开采
grouped bench mining 组合台阶开采
composite-bench mining 组合台阶开采
underground bench mining 井下梯段采矿法
An experimental test of bench mining in the high and dangerous slope of a certain open-pit mine was made.
在某露天矿山的高危边坡上进行了台阶采矿的试验研究。
Bench height increasing is beneficial to reducing mining cost.
增加台阶高度对于降低采矿成本是有益的。
It expounds various mining methods and steps, including the bench demarcated, plan mining bench top and bottom floor, the coal and overburden amount of plan mining, and coal quality indicators.
阐述编制露天矿的各种开采计划的方法和步骤，以及其台阶划分、计划台阶顶底板的控制、编制剥离量和采矿量及其煤质指标等；
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