Blast Mining allows you to use TNT to mine ore, without a risk of losing any of the ore. There's a few catches, though - it has a 60 second cooldown, and the TNT cannot be lit normally. To activate Blast Mining and simultaneously trigger the TNT, you need to move out of the 'block selection' range and then shift right click with the crosshair pointed at the TNT you placed. This will instantly trigger an explosion, rather than causing it to flash.
The benefits of using Blast Mining are a chance at triple drops, and guaranteed silk-touched ore. As you rank up your Blast Mining, you can also reduce the debris that drop (such as cobble) to almost nothing, as well as increase the blast radius of the explosion through the Bigger Bombs passive sub-skill. There's also a damage reduction from TNT explosions, via the Demolitions Expertise passive sub-skill.
|Normal level||Retro level||Blast Radius||Damage Reduction||Drop multiplier||Bonus ore||Debris Reduction|