Yeah its true that bitcoin halving is going to increase pressure on miners and managing overall mining costs is definitely a big issue here. After halving if bitcoin keep holding its price towards uptrend than it will be a little relief for miners. Most important fact is miners have to cover their costs anyhow otherwise a big number of miners will shut down their rigs for sure. So during halving only bitcoin price can help them to tackle the upcoming situation.

I don’t believe that miners will take hard decision to shut down their businesses for ever but most of them will try their best to survive in a situation like this.