How do you stop chickpeas exploding in the microwave?
First rule of the microwave...
Always use a loose-fitting lid.
It reduces the cleaning frequency of the interior from once a day to every 6 months or so ;)

I'm pretty sure that unless you want to prod every single legume with a cocktail stick before putting it in the microwave, then you can only do so much to mitigate this issue. Closed containers will go 'pop', almost without fail if you're nuking it mercilessly.

Mitigation could include :-


Stirring more frequently than usual
Reduce the heating time, or segment it - 30s, 1 minute rest, 30s...
Make sure they are completely covered in sauce - like a can of Heinz Beanz.