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.
“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.
“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；
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