Coring device and method for rock easy to disintegrate when encountering water

According to the coring device capable of easily disintegrating the rock in the presence of water, a cooling system is additionally installed and transformed on the basis of an existing automatic coring machine, and according to the rock disintegration degree, the opening and closing degree and state of an adjusting valve are adjusted through a computer automatic control system; parameters such as flow velocity and pressure of high-pressure air and cooling water are controlled, an optimal cooling mode is selected, and a single water cooling mode in a coring process is changed into a mode of interaction of two modes of high-pressure air cooling and water cooling, so that disintegration of a rock sample is avoided; according to the rock coring device, switching of three modes of single high-pressure air cooling, single water cooling and high-pressure air cooling and water cooling in the rock coring process can be achieved, and the improved coring device is not only suitable for coring of common rock samples, bu