karst collapse column

discussion of karst collapse column forecasting methods in lu'an coal mine

潞安矿区陷落柱预测方法浅探

on karst collapse column and tactics of mine water prevention

岩溶陷落柱与矿井防治水策略研究

formation cause and distributing on karst collapse column

陷落柱的形成与分布

The collapse continued formed karst collapse column.

溶洞顶板持续塌陷会形成陷落柱.

research on minimum traveltime of tomography for ground stress anomaly and karst collapse column in deep coal mining

深部开采地应力异常及陷落柱最小走时层析成像研究

the two results are identical, all indicate the ground stress in and around karst collapse column is abnormity.

两者结果吻合，表明陷落柱及其周边存在应力异常。

modeling research on characteristics and extraction method of abnormal seismic waves on small scale karst collapse column

小陷落柱异常波提取及其特征的模型研究

distributing of ground stress in and around karst collapse column

陷落柱及其周边地应力分布研究

discussion of karst collapse column of fenghuangshan underground

对凤凰山井田陷落柱的探讨

study on the rational size of the coal column to prevent water inrush at karst collapse column

防止岩溶陷落柱突水的煤柱合理尺寸研究

causes of formation and difference of water transmitting ability on top hollow karst collapse column and top full karst collapse column

顶空型与顶实型陷落柱的成因与导水性能的差异