Abstract: The present disclosure discloses a method for adding group members. When the first user needs to add a new member to the target group in the instant messaging system, in response to triggering of a first user, an imported target document is obtained, and the target document includes user information of one or more second users in an instant messaging system. After obtaining the target document, the target document is parsed to obtain user information of one or more second users included in the target document in the instant messaging system. After obtaining the user information through parsing, the one or more second users will be added to the target group in the instant messaging system based on the user information.

Abstract: This disclosure describes an in-situ surrounding rock testing device and method. The testing device includes a collection device and a control terminal. The collection device includes a pressure cell, displacement meters and a magnetic base. When mechanical properties of surrounding rock are tested, the collection device is only necessary to be installed on an outer surface of a gripper of a TBM. The outer surface of the gripper is coupled to a rear end surface of the magnetic base; a front end surface of the pressure cell and displacement meters are in contact with the surrounding rock. The pressure cell measures pressures undergone by the surrounding rock. The displacement meters measure a total compaction displacement of the surrounding rock relative to the collection device. A pressure-displacement curve of the surrounding rock can be obtained by the testing device while pressing the gripper tightly against the surrounding rock.