Long-term observation structure for underground stratum connectivity of coal mine

The utility model belongs to the technical field of coal mine underground water control, and particularly relates to a coal mine underground stratum connectivity long-term observation structure. The technical problem that when various parameters such as the pressure, the water volume and the water quality of Ordovician limestone water are tested at present, due to the fact that the formation pressure is large, various impurities mixed in the water can easily cause the flowmeter to be clamped or damaged is solved. A long-term observation structure for underground coal mine stratum connectivity comprises a first-open structure, a first-open screen pipe running into the first-open structure, a shallow casing pipe connected to the top of the first-open screen pipe, a second-open structure and a deep casing pipe running into the second-open structure. The top of the shallow casing extends out of the wellhead, and the deep casing extends out of the shallow casing; the side wall of the shallow sleeve is connected wi