1、Stress concentration role mechanism of ultra thick seam to cause pressure bumping
2、Since 1980's, the full-mechanized caving technology for thick seam in China was rapidly developed with a significant technical and economic benefit.
3、There are series problems exist in the existing thick seam mining technology with large dip Angle, thus cause low extraction rate, poor safety and high cost.
4、Numerical simulation software FLAC2D is used to simulate the failure mechanism of slender coal pillars (which are of much lower width to height ratios) during high wall mining of thick seam.
5、This paper summarizes the organization and key technology of rapid construction medium and large head chamber in thick seam, and provides valuable experience for the project under similar condition.
6、This paper introduces the advantages and disadvantages of each coal mining method in the thick seam, and connecting with the features of Wangjialing Mine, selects the appropriate coal mining method.
