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在矿井生产的开拓、准备、回采三个环节中，准备环节起着承上启下的作用，既要有利于井田开拓，又要适合采煤的发展。水平内开采系统主要属于准备系统，其改革与发展可归结为：开采水平内准备方式的多样化；采（盘、带）区的大型化；开采水平内生产的高产高效集中化；水平内开采布置的单层化和全煤巷化等。
In the three aspects of exploration, preparation and recovery of mine production, the preparatory segment plays the role of linking up and down, which is not only conducive to minefield development, but also to the development of coal mining. The horizontal mining system mainly belongs to the preparation system. Its reform and development can be attributed to the diversification of the preparation methods within the mining level, the large-scale mining (panning and banding) area, the high-yield and high-efficiency centralized production within the mining level, the horizontal mining Layout of the whole coal and alley and so on.