Patent ID: 11859493
Assignee: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Civil engineering (Other fields)
Classification: CPC E  G | IPC E  G

Claim 8:
9. A method using the device for monitoring a horizontal extrusion force of roof rock strata according to claim 1, comprising the following steps:
at step a, connecting the connecting rod with the pressure measuring segment, connecting the high-pressure oil pipes in the inner cavities of the connecting rod and the pressure measuring segment by the oil pipe joints, fixing the tray, and mounting the connection casing;
at step b, pushing the connecting rod and the pressure measuring segment into a borehole by the push rod, and dismounting the connection casing and the push rod after the tray and the roof are fixed;
at step c, connecting the exposed high-pressure oil pipes to the hydraulic pump, the pressure control valve and the pressure gauge;
at step d, turning on a switch on the pressure control valve, performing pressurization by injecting oil using the hydraulic pump, and stopping pressurization after a reading of the pressure gauge reaches 5-6 MPa, so that hydraulic oil flows back; emptying air in the high-pressure oil pipe by repeating this step 2-5 times;
at step e, performing pressurization by injecting oil using the hydraulic pump, and closing the pressure control valve after the reading of the pressure gauge reaches 5-6 MPa;
at step f, performing pressurization for a plurality of pressure measuring segments respectively through hydraulic oil injection by repeating steps d and e;
at step g, dismounting the hydraulic pump, and monitoring and storing monitoring data of the pressure gauge; and, at step h, opening the pressure control valve to discharge the hydraulic oil; connecting the connection casing and the push rod to take out the connecting rod and the pressure measuring segment from the borehole by the connected push rod.