“一步”低压注浆充填壁后散体状碎石充填层，堵塞浅部围岩泄压通道；
Step one is to grout with low grouting pressure to fill the gravel pack interval and blocked the channels which relieves the grouting pressure in the shallow surrounding rock.
重点说明了盾构本体、泥水输送系统、泥水处理系统和同步注浆系统中低压电器的工作原理。
The working principle of shield, slush transportation system, slush disposal system and the low-voltage apparatus equipment in the simultaneous slush pouring system were emphatically explained.
化学注浆是解决难灌注地层和低压条件下的矿井水砂灾害防治的有效手段。
The chemical grouting is one of effective methods to treat mine quicksand in difficult grouting strata with low grouting pressure.
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