Loosing circle testing system and method based on coupling effect of rock water in drill holes of soft rock

Abstract

The invention discloses a loosing circle testing system and method based on a coupling effect of rock water in drill holes of soft rock. The loosing circle testing system comprises a hole sealing device, a grouting device, a water injection device, a testing device and a control device. The testing device comprises a telescopic rod body, a displayer, ultrasonic transmitters, ultrasonic receivers and a stand column used for supporting the telescopic rod body. The ultrasonic transmitters and the ultrasonic receivers are connected to the input end of the displayer through lines and connected to the control device through the output end of the displayer. Detecting rods are connected to the two ends of the telescopic rod body respectively. The heights of the two detecting rods are the same, and the two detecting rods are kept parallel. Each detecting rod is formed by sleeving a plurality of pipe bodies together. One ultrasonic transmitter and one ultrasonic receiver are installed on the head of each detecting rod respectively. The dynamic hole sealing device achieves synchronization of plugging cracks in the holes through grout and coupling of the rock water, and the problem that when top plate surrounding rock is tested, a large amount of water in the drill holes is lost in the testing process, and can not be supplemented in time is solved.

Description

technical field [0001] The invention relates to the technical field of testing loose circles of surrounding rock in tunnel engineering and coal roadway engineering, in particular to a loose circle testing system and method based on rock-water coupling in soft rock boreholes. Background technique [0002] With the development of underground engineering and the advancement of scientific theories, many theoretical results about the loosening range of surrounding rocks have been produced abroad. These results are mainly derived from empirical formulas and related theories, and have certain rationality and applicability. Therefore, the theoretical method for calculating the loose circle of surrounding rock can be further deduced by referring to its conclusion on the range of surrounding rock fracture, but the theoretical method is greatly affected by the complex factors of engineering practice and has great limitations. Based on the on-site measurement of the surrounding rock loo...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the acoustic wave method is prone to hole collapse during the soft rock drilling test process and cannot perform effective water coupling due to the difficulty in sealing water during the roadway top test process, the present invention proposes a method based on soft rock drilling. Surrounding rock loose circle test system and method based on inner rock water coupling effect, this test system can avoid the occurrence of hole collapse in the soft rock drilling test process, and has stronger applicability and safety

Images