破碎煤岩体化学注浆加固机理分析及应用

Analysis and application of chemical grouting reinforcement mechanism to broken coal and rock mass

针对目前矿井开采深度增加、伴随出现断层等构造带的地质条件下,巷道围岩破碎,松动范围大的特点,以压注法注浆和木锚杆锚注2种工艺的流动规律为基础,从煤岩体破坏机制和力学原理分析,将化学浆对煤岩体的作用机理归纳为网络骨架作用、粘结补强作用、充填压密作用和转变破坏机制等4种作用;按成因、存在状态和分布情况对煤岩体内的裂隙和孔隙进行了详细分析;最后通过工程实例对2种注浆工艺进行了应用和验证;结果表明通过注浆加固后的破碎煤体的完整性明显提高,在外载作用下具有较强的整体变形能力,不发生碎裂,但不能完全阻止原来离层破碎体固结后在外载作用下产生变形。

According to mining depth increased in mines,under the geological conditions of the fault and the tectonic zone occurred and the surrounding rock broken and lager released area in the mining gateway,based on the mobile law of the pressurized grouting and grou- ting wooden bolt techniques,from the analysis on the failure mechanism and mechanics of the coal and rock mass,the functional mecha- nism of the chemical grout to the coal and rock mass could include the net frame function,binding reinforcement functi...