2) longwall remaining coal pillars support mining
长壁留煤柱支撑法开采
1.
Existing problem on longwall remaining coal pillars support mining;
长壁留煤柱支撑法开采存在的问题
2.
This article tries to summarize experiences of the small collieries in mining shallow coal seam in north of Shanxi Province, and suggests to reform unadvanced mining of room and pillar to longwall remaining coal pillars support mining which can largely inprove the coal recovery rate.
在总结陕北煤田小煤矿开采浅部煤层经验的基础上, 建议将落后的房柱式改革为长壁留煤柱支撑法开采, 以较大幅度提高采出率。
3) longwall remaining coal pillars support
长壁留煤柱支撑法
1.
Structural analysis of "roof-pillars" on longwall remaining coal pillars support mining;
长壁留煤柱支撑法开采“顶板-煤柱”结构分析
4) longwall pillar working
长壁煤柱回采工艺
5) coal pillars
留煤柱
1.
Base on the longwall coal mining with coal pillars applied in the medium and small coal mines in the Shaanbei Coal Field,the technical targets to prevent and reduce the mine disasters are to classify two different feature coal pillars.
针对陕北煤田中小煤矿采用的长壁留煤柱开采,防灾减灾的技术目标是区分两类不同性质的煤柱,即区内煤柱和区域间的隔离煤柱,实现隔离小区域的适时无灾害垮落,防止跨隔离区的大范围垮落。
补充资料：留壁
1.指驻军设防。壁，军垒。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条