http://breezewiki.catsarch.i2p/minecraft/wiki/Tutorials/Defeating_a_monument
In Java Edition , use milk to counteract the Mining Fatigue. In Bedrock Edition, milk removes Mining Fatigue for no more than one second so milk isn't useful; instead, use the correct tool (shovel for sand, pickaxe for stone, hoe for sponges, etc.) for each block you mine (gold tools are most efficient but wear out quickly), preferably enchanted with Efficiency, and you can actually make progress under constant Mining...