搜索结果: 1-4 共查到“安全科学技术 Coal seam”相关记录4条 . 查询时间(0.031 秒)
Safety line method for the prediction of deep coal-seam gas pressure and its application in coal mines
Gas pressure Measuring principle Prediction method Safety line Coal and gas outburst
2012/4/14
Gas pressure is an important index for evaluating the outburst risk and determining the gas content in coal seams. It is recommended to predict coal-seam gas pressure of the workface at deep levels be...
Rapid regional outburst elimination technology in soft coal seam with soft roof and soft floor
Soft coal seam Regional outburst elimination Numerical simulation Gas drainage
2012/3/27
In order to solve the problems in outburst elimination of coal seams with outburst potential, methods of field testing, theoretical analysis and numerical simulation are employed in this study. It is ...
Experimental research on the variational characteristics of vertical stress of soft coal seam in front of mining face
Soft coal seam Mining face Vertical stress distribution Layered characteristics Experimental research
2012/3/28
Permeability of coal seam is extremely sensitive to the in situ stress loaded. The techniques of ‘‘Pressure relief’’ have been proved significantly effective in practice to improve the gas permeabilit...
Research and practice on fluctuation water injection technology at low permeability coal seam
Low permeability coal seam Fluctuation water injection Permeable agent Dust fall Rock burst Cooling
2012/3/31
In order to solve the problem of poor affusion effect on low permeability coal seam, the paper analyzes the micro process of the coal seam water infusion in wetting coal and determines the main factor...
