Grouting and water plugging device for broken rock in mine coupling state and test method

Abstract

The invention provides a broken rock grouting and water plugging device in a mine coupling state and a test method, and relates to the technical field of rock mechanics tests. The device comprises a pressurizer, an impounding reservoir, a test box and a grouting pump, the impounding reservoir comprises a temperature sensor and a water pressure plate, the water pressure plate is connected with the pressurizer through a pressurizing rod, a pressure measuring pipe and a drainage pipe are installed on the outer side of the impounding reservoir, and the impounding reservoir is connected with a water pump through a water injection pipe. The test box comprises rock, a transverse force application plate, a longitudinal force application plate, a stress sensor and a temperature sensor, a plurality of water through holes are formed in the longitudinal force application plate, a push-pull box door is hinged to the front wall of the test box through a hinge piece, a pressure measuring pipe and a drainage pipe are installed on the rear wall of the test box, and the rear wall of the test box is connected with a grouting pump through a grouting pipe; the grouting pipe is provided with a water pressure gauge, and the grouting pipe, the pressure measuring pipe, the water injection pipe and the drainage pipe are provided with valves. The device is used for performing a rock simulation test under the stress-temperature-water pressure coupling condition under a mine, and the water plugging effect is verified.

Description

technical field [0001] The invention relates to the technical field of rock mechanics test, in particular to a grouting water blocking device and a test method for fractured rock in a coupled state of a mine. Background technique [0002] With the increase of mining depth, especially under the conditions of "three highs" (high stress, high ground temperature and high water pressure), under the influence of mining activities, a large number of wing-shaped micro-cracks are more likely to form inside the deep rock. Under the combined action of hydraulic penetration and expansion, the penetration of each other increases the permeability of the rock, induces an increased probability of water inrush disasters, and brings serious hidden dangers to the safety production of coal mines. key. The rock crack grouting water blocking technology is one of the effective measures to prevent and control mine water hazards and ensure safe mining. [0003] Most of the existing test equipment ...

AI Technical Summary

Problems solved by technology

[0003] Existing test equipments mostly focus on a single factor in the study of rock fracture expansion. The influence of a single factor on rock cannot fully reflect the actual changes in rock and water inrush conditions. Verification of crack plugging effect after rupture

Images