Experimental system for coupling of seepage and stress in rock tensile state

The invention discloses an experimental system for coupling of seepage and stress in a rock tensile state. The system comprises an oil pressure chamber, a tension device and a computer, wherein a top cover and a bottom cover are arranged on the oil pressure chamber, wherein positions of the bottom cover and the oil pressure chamber are fixed; the top cover can slide relative to the oil pressure chamber; the top cover is also used for clamping the upper end of a test sample as a test sample upper end cover; the bottom cover is used for clamping the lower end of the test sample as a test sample lower end cover and forms a sealed seepage chamber together with the lower end of the test sample; the sealed seepage chamber is communicated with a water inlet pipe; the top cover is communicated with a water outlet pipe; the oil pressure chamber is communicated with an oil pipe; the tension device is connected with the top cover; and the computer is used for controlling an oil pump, a water inlet pump and a water outlet pump as well as a flowmeter and extracting data information. The experimental system disclosed by the invention has the advantages as follows: variation process and rule of rocks under a tensile stress and seepage coupling effect can be studied; a seepage and stress coupling mathematical model capable of describing stress, strain and seepage coefficient evolution rules of the rocks is established; and a seepage failure mechanism of a project is studied from a microscopic angle.