Grading and yielding similar material simulation support device based on air pressure core mold

A grading and yielding similar material simulation support device based on an air pressure core mold belongs to the technical field of mining. The device comprises a gas pump, a high-pressure pipe, an inverted valve, a high-pressure four-way pipe, an air pressure core mold, a pressure relief valve and a pressure regulating gas-pressure meter. The gas pump is connected with the inverted valve through the high-pressure pipe. The other end of the inverted valve is connected with the high-pressure four-way pipe through the high-pressure pipe. The air pressure core mold, the pressure regulating gas-pressure meter and the air pressure core mold are respectively connected with the other three ends of the high-pressure four-way pipe through the high-pressure pipe. The gas pump supplies pressure through the high-pressure pipe. Air flow is controlled to enter by the inverted valve. Support pressure is controlled by the pressure regulating gas-pressure meter. When the yielding reaches a certain pressure value, the press