Burner drills are usually used until the player has built an electrical network, at which point the larger and faster electric mining drill becomes more useful, though they can still provide some use as extra drills that take up less space.
Two burner mining drills can refuel each other when placed next to each other on a coal deposit as long as they're facing each other. Each drill fuels the other and coal gradually accumulates in their stacks, so you have effectively a storage of 100 coal (2 stacks, 50 coal, one in each burner miner, together 100). You can do this also for 4 or any other even number of miners.
Note that it takes slightly less than 3 minutes for the mining drills to completely fill each other's fuel inventory. Once full, the drills will sit idle until the accumulated coal is removed. It's possible to extend that time by having the drills output their coal into a buffer chest rather than directly into another drill's fuel stack.
This method can be used for any number of burner mining drills in a coal deposit. Place a burner mining drill, then place at least three transport belts from the output in a mirrored "L" like shape so that the third belt has a gap between it and the miner. Fill the gap with a burner inserter in a way that the inserter can insert coal to the miner. When placing this array of entities opposite of each other, ensure that no two burner inserters are trying to take coal from the same piece of belt or one of them might run out of fuel.
A fix for apm_power when using with bob's and aai. This mod revisits the early game of Factorio and pushes the electrification a bit further back by extending the Burner-Stage and inserting a new stage: Steam-Stage (buildings will be powered by steam). 'Love and fame for the burner inserter!' The production lines of this mod focus on fuel production, but it also comes with a few new intermediates and a new science package. It does not change the standard Techtree too much, the majority of the related tech for this mod comes before the vanilla techtree even begins. The vanilla techtree and most of the other mods content are locked behind a new technology called 'Electrification' which can be called the goal of this modification.
Adds ore refining to the game. Compound ores have to be refined before you are able to smelt and cast them into plates. Works best in conjunction with Bobmods and supports additional mods like Yuoki Industries, Uranium Power and Nucular.