coal pillar

例句与用法

Mining practices on coal pillar and room mining under two goaf and highway bridge
基于上覆两层采空区的公路桥煤柱条带开采
Study on intensive rheological soft rock roadway supporting in high stress coal pillar zone
高应力煤柱区强流变软岩巷道支护研究
Mine pressure measurement in coal pillar and its application to roadway driven close to goaf
煤壁矿压测定及其在沿空掘进中的应用
Rapid advancing technology for top coal caving workface in densely sinking area of coal pillars
密集陷落柱区综放工作面快速推进技术
Coal pillar thrust
煤柱压碎
Stability analysis of coal pillar and reinforcement technology in north air shaft in dongpang mine
东庞矿北风井煤柱稳定性分析及其加固技术
Study on distribution laws of stress in inclined coal pillar for fully - mechanized top - coal caving face
综放面倾向煤柱支承压力分布规律研究
Numerical simulation of overburden failure and coal pillar stability in steep multi - seam mining
急倾斜煤层群开采覆岩破坏与煤柱稳定性数值模拟
Stress analysis and parameter optimization of coal pillar in gateway of fully mechanized caving face
综放工作面回采巷道煤柱应力分析与参数优化
Analysis and governing of the gas in the working face of the fully - mechanized sub - level caving in the small coal pillars
小煤柱综放工作面瓦斯涌出分析及治理