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Exploitation by caving method 崩落开采
STUDY ON RECOVERY OF ORE-BEARING OVERBURDEN LAYER FORMED BY CAVING METHOD 崩落法矿山含矿覆盖层回收研究
There is no exploitation by middlemen. 不被中间商剥削。
Monitoring and Analysis of Collapse Process of Overlying Rock Strata in Extraction by Caving Method 崩落法回采时顶板岩层崩落过程监测与分析
The rockfall hazard will take place inevitably under the condition of steeper hillside after ground collapse or cave to ground surface caused by exploitation with caving method. 摘要在山体下进行崩落开采崩通或塌陷到地表时，在陡峭的山体地形条件下将不可避免地产生滚石灾害。
RESEARCH ON PARAMETERS OF BOLTING (CABLING) WITH WIRE MESH IN ACTUAL MINING ROADWAY BY CAVING METHOD 放顶煤回采巷道锚网(索)支护参数研究
The exploitation by the merchants is really enormous. 商人在这中间的剥削真是大得很。
Study of mining the safety pillar against sand by caving method under conditions of thick ravelly ground and super thin capping rock 厚松散层及超薄覆岩条件下放顶煤开采防砂煤柱
The paper is of important instructive importance to reduce loss and depletion by sublevel caving method without sill pilla... 并对今后无底柱分段崩落法降低损失贫化具有重要的指导意义。
The backward economy and the cruel exploitation by the serf-owners kept the people in dire poverty and misery. 经济的落后和农奴主的残酷剥削，使人民群众处于极端贫穷和悲惨的生活境地。
As a result,the short hole shrinkage method with flat bottom structure was employed to mine the stope firstly,then stoping ore pillar by medium length hole caving method. 后沟金矿采用平底结构浅孔留矿法先采矿房，后用中深孔崩落法回采矿柱，经两年多的生产实践，取得较好的技术经济指标。
They were also exploited by usury. 他们还受高利贷的剥削。
Mining by caving method 崩落法开采
In doing business, we should see to it that they are not subjected to exploitation by middlemen at any stage. 贸易中要免除层层中间剥削，使他们少吃亏。
Capitalists exploit workers. Workers are exploited by capitalists. 资本家剥削工人。工人被资本家剥削。
All the fossils were exploited by an expedition. 所有的化石都是由一支探险队开发出来。
In doing business,we should see to it that they are not subjected to exploitation by middlemen at any stage. 贸易中要免除层层中间剥削，使他们少吃亏。
The workers reacted against the capitalists'ruthless exploitation by holding strikes . 工人们举行罢工，反对资本家的残酷剥削。
Feasible drawing interval is the basis to study mining equipment of fully-mechanize coal mining with caving method. 综放开采的合理放煤步距是研制综放工作面成套技术装备的基础,是提高综放工作面采出率与煤质的关键之一。
The workers reacted against the capitalists'ruthless exploitation by holding strikes. 工人们举行罢工,反对资本家的残酷剥削。