Water tank experimental device and experimental method for simulating development of underground karst system

The invention belongs to the field of underground water resource development and oil and gas resource exploration, and discloses a water tank experimental device and experimental method for simulating underground karst system development. The device comprises a leaching subunit, an inclination control subunit, a liquid preparation subunit and a monitoring subunit. According to the method, gypsum and water are mixed according to a certain proportion to vividly simulate an underground karst system, and a first circulating pump and a second circulating pump are used for realizing acid solution leaching and simulating corrosion of atmospheric fresh water and underground water on a stratum. The concentration of the acid solution is constant through the pH value regulator, and the gradient of the gypsum model and the relative position of the acid solution are controlled through the gradient control subunit. The water tank experimental device and experimental method for simulating development of the underground kars