FIELD: oil and gas industry.
SUBSTANCE: claimed system consists of two and more chambers separated by posts provided with cross slits for sequential venting that make the spare material feed outlets. Said chambers have side solid coal posts arranged on both sides spacing there between being smaller than the roof caving spacing. The chambers extend along its rift to provide the crosswise impermeability of rift fractures. Posts between the chambers at optimum spacing are produced by smooth drives of heading machine. Note here that unloading of rock from said heading machine is performed by self-propelled cars onto the group conveyor.
EFFECT: impermeable coal posts.
2 dwg
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