implementing a check system for quarry

Hi, im currently trying to make a datapack for 1.21.4 to have a quarry that mines blocks in a certain for you. Currently im facing diffferent small problems, but 2 main things which i cant figure out after spending so many hours: - first problem: I have a armorstand with a tag the serves as the quaary and that moves down as the layer is mined. But im not able to implement the mechaniscm that checks what kind of there are underneath the armorstand/quarry that will be mined - second problem: following from the first point, i also cannot figure out how transfer those blocks that are mined beneath the armorstand to a chest that i summmon next to the mining area. I have a chest, on top of it a hopper facing the in the chest and on top of the hopper i have another armorstand so i can refer to. if i could get help developing this quarry, especially this things then i would really appreciate it!