Method for testing rock expansion force

The invention provides a method for testing a rock expansion force, comprising the following steps: S1, processing the rock into a rock sample; S2, wrapping an adhesive layer on the outer peripheral surface of the rock sample, and determining an elastic modulus E; S3, soaking an artificial core with water, and recording a hoop strain epsilon of the adhesive layer; and S4, taking the data obtainedin the S2 and S3 into the formula: sigma is equal to Eepsilon, and calculating the formula to obtain an expansion force sigma at the junction of the adhesive layer and the rock sample, wherein sigma is the expansion force of the rock sample. By processing a rock sample into an artificial core having an adhesive layer, pre-calculating the elastic modulus E of the adhesive layer, then soaking the artificial core with water, and obtaining the expansion force due to formula calculation by recording the hoop strain epsilon of the adhesive, the method for testing a rock expansion force provided by the invention greatly redu