... coal-mining methods 采煤方法 coal pillar mining 带煤柱开采 opencast coal-mining 露天采煤. ...
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coal pillar mining under stress 煤柱应力下开采
strip extraction coal-pillar mining 条采煤柱回收
pillar coal mining method 柱式采煤法
actual mining coal pillar 回采煤柱
reamer-pillar coal mining method 刀柱式采煤法
The feasibility of the protective coal pillar mining in the artificial inclined steep drift in the thick (ultra thick) coal seam of a large slope is discussed.
论证了急倾斜厚(特厚)煤层伪斜上山保护煤柱回收的可行性。
Recovering coal by sublevel mining pillar and not damaging the houses on ground is introduced.
用条带开采煤柱回收煤炭资源，而不破坏地面房屋、住宅。
The mechanical model of key strata supported by coal pillar is set up according to the layout of coal pillars in the coalface of short wall mining.
根据短壁开采条件下保护煤柱的布设特点，建立由保护煤柱支承的关键层力学分析模型。
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