Multiple-block mining

I am trying to get a multiple-block mining mod, sort of like TapL's chunk miner to work. Despite looking good visually, I can't seem to get it to work. Here's a screenshot to give you an idea of how I'm trying to do this. 

training, Dig This!

Tutorials/Mining – Minecraft Wiki

What is Mining as a Service (MaaS)? Definition and How It Works

Eyes on Mining Benefits, as Datamall Chain, Signs Multiple

How to Mine Cryptocurrency

Theoretical research on reasonable shield support capacity in

Solved require the use of multiple graphics processing units

How to Mine Bitcoins

How mining works? - GeeksforGeeks

Let's talk block caving : Material flow - Dassault Systèmes blog

Multi-element geochemical data mining: Implications for block

FTB Ultimine (Forge) - Minecraft Mods - CurseForge