n. coulisse
柱沟 stria ; strie
沟道钢支柱规范 Specification for steel trench struts
堑沟底柱结构 trench-shape sill pillar
柱头沟 [植] stigma canal
阐述了哈拉沟煤矿主采煤层顶板的赋存特征，以现场监测、现场调研为手段，分析了煤层开采、护巷煤柱尺寸及地下水对煤巷顶板稳定性的影响，为今后煤巷顶板稳定性分类及合理支护提供依据。
By taking the on-site monitoring and research as a tool, the influence of coal mining, coal pillar size and underwater on the roof stability of coal roadways is analyzed.
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