Model selection method for artificial dam body of underground reservoir

The invention discloses a model selection method for an artificial dam body of an underground reservoir. Comprising the following steps that the underground reservoir is surveyed, and space structures such as a coal pillar dam body and a connection roadway of the underground reservoir are determined; the method comprises the following steps: carrying out space gridding division on an underground reservoir coal pillar dam body, reasonably drilling at divided grid points to obtain coal pillar samples, reducing grid intervals on two sides of a coal pillar connection roadway, and carrying out key sampling; performing a laboratory test on the underground reservoir coal pillar sample to obtain specific parameters of the coal pillar sample; performing numerical simulation according to the actual structure condition of the underground reservoir, and determining a safety coefficient; according to the numerical simulation result, the most suitable artificial dam body type of the underground reservoir is determined by c