Hole-sealing pressure measuring device

The utility model discloses a hole-sealing pressure measuring device, which comprises a pressure gage, a front-mounted baffle, a first rear-mounted baffle, a second rear-mounted baffle, a piezometric tube, a grouting pipe and a return pipe, wherein an expansion material is arranged on the upper surface of the front-mounted baffle, another expansion material is arranged between the first rear-mounted baffle and the second rear-mounted baffle, the piezometeric tube penetrates through the expansion material, the front-mounted baffle, the first rear-mounted baffle, the other expansion material and the second rear-mounted baffle sequentially, a closed portion of the piezometric tube extending out of the second rear-mounted baffle plate is provided with an air inlet, an opening portion of the piezometric tube extending out of the expansion material is connected to the pressure gage, the grouting pipe and the return pipe penetrate through the expansion material and the front-mounted baffle sequentially, one end of the grounding pipe and one end of the return pipe extend out of the expansion material while the other ends thereof are arranged between the front-mounted baffle and the first rear-mounted baffle. The hole-sealing pressure measuring device can effectively seal pressure measuring holes and realizes measuring gas pressure of coal seams accurately.