Loose circle test system and method based on rock-water coupling in soft rock drilling

Abstract

The invention discloses a loose ring testing system and method based on rock-water coupling in soft rock drilling, which includes a hole sealing device, a grouting device, a water injection device, a testing device and a control device. The testing device includes a telescopic rod body and a display , an ultrasonic transmitter, an ultrasonic receiver and a column used to support the telescopic rod. The ultrasonic transmitter and the ultrasonic receiver are connected to the input end of the display through a line, and connected to the control device through the output end of the display. The two ends of the telescopic rod Each end is connected with a detection rod. The two detection rods are of the same height and kept parallel to each other. Each detection rod is formed by nesting several pipe bodies. rod head. The dynamic hole sealing device of the present invention realizes the synchronization of grout sealing the fissures in the hole and rock-water coupling, and solves the problem that water cannot be replenished in time due to a large amount of water loss in the borehole during the test of the surrounding rock of the roof.

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...

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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

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