大台井深部岩巷岩爆发生机理与预防措施研究

大深度、高地应力下的岩巷岩爆问题是煤炭企业面临的重大技术难题。根据大台井深部岩巷发生的岩爆现象,分析了深部岩巷岩爆发生的机理。通过计算得出大台井深部岩巷岩爆发生的临界深度为723 m。指出发生岩爆的主要因素是深部开采和复杂的地质构造所致,采用合理的巷道布置,选择合适的断面形状,使用锚网喷支护方式,可以预防岩爆的发生,避免人员伤亡,提高掘进速度的作用,达到安全快速掘进的目的。

A study of mechanism and prevention of rockbursts in deep galleries of Datai coal mine

The rockburst phenomenon that often takes place in deep galleries of coal mining industry in high geostress areas is a major problem in technigues. This paper analyses the mechanism of the rockburst in the light of the rockburst occurring in the deep galleries of Datai coal shaft and points out that the main facters to induce rockbursts are deep extraction and complex geological structure. The calculation results give a critical depth of 723 m for rockbursts to take place in Daitai shaft and arrive at condusions that reasonable layout and transection shape of galleries can prevent rockburst and avert safty accidents, thus realizing the goal of safe and quick tunnelling.