METHOD FOR REMINING RESIDUAL COAL PILLAR IN RESIDUAL MINING AREA BY COLLABORATION OF PILLAR-SIDE BACKFILLING AND IN-SITU GASIFICATION
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Sep 12, 2024
app pub date -
Aug 3, 2023
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Mar 7, 2023
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Disclosed is a method for remining a residual coal pillar in a residual mining area by collaboration of pillar-side backfilling and in-situ gasification. The method includes the following steps of: ascertaining geological and hydrological conditions, a geometric shape and a reserve of a residual coal pillar; determining the feasibility of underground gasification mining for the residual coal pillar; carrying out side supporting on the residual coal pillar in a goaf by using a pillar-side backfilling method; and carrying out the underground gasification mining on the residual coal pillar by means of an underground coal gasification process.
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