Key technology study on pillar mining under the system of room and pillar mining

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2007,（3）
• 页码范围: 380-383
• 页数: 4页
• 语种: 英文

摘要

Taken taifeng coal mine in Mongolia for example, discussed the stability and controllability about advance pillars which locate at the front of working face and makes simulation on pillar with the software UDEC3.1. The failure styles of advance pillars are shear failure and compression failure through analyzing the stability of advance pillars.The paper concludes that can protect advance pillars from shear failure by controlling coefficient of volumetric expansion of mining field rock and supports' working resistance and can also protect it from compression failure by advance supporting, increasing setting pressure and working resistance. Two advance pillars are influenced and the main failure form is compression failure through the numerical simulation.