中厚矿体卸压开采技术研究现状及存在的问题

The research situation of depressurized mining and existence problem for medium-thick ore-body

中厚矿体的开采特点是崩落矿石的空间移动条件极差,对采准工程的稳定性要求较高,如果采准工程遭到地压作用而发生破坏,其负担的矿量容易成为永久损失。此外,随着采深的增加,地压显现更加明显,严重影响着中厚矿体的开采安全。针对上述问题,本文提出了中厚矿体卸压开采思路,介绍了不同卸压开采方法并分析了其存在的问题。根据中厚矿体的开采特点提出了崩落法卸压开采方法,并分析了崩落法卸压开采应用中存在的主要技术问题,以及中厚矿体崩落法卸压开采中需要研究的主要问题。

The mining characteristic of medium-thick ore-body is that the mobility of broken ore is limited, it is very important to keep those development workings in stable condition to guarantee safe production. If the weak surrounding rock mass is highly stressed, the ore may be lost permanently since the damaged development tunnels become not accessible due to safety. In addition, with mining depth increased, more and more underground mines face the problem of serious stope failure because of ground pressure redistribution. So, the paper propose depressurized mining method for medium-thick ore-body. The paper introduce the different depressurized mining method and analyze its shortcomings. According to the mediumthick ore-body＇s mining characteristic, the paper analyze the major technique problem that influence mining successfully or not in the depressurized mining and the major problem that need to be solved in the depressurized sublevel caving method for medim-thick ore-body.