A comprehensive test device and method for water inrush and grouting treatment in goaf

Abstract

The disclosure provides a comprehensive test device and method for goaf water inrush and grouting treatment, which relate to the technical field of tunnel and underground engineering disaster control, including a loading mechanism, a grouting mechanism and a monitoring mechanism. The loading mechanism includes a pressure applying mechanism and a test cylinder The silo and the loading piston, the test silo is provided with a detachable cover plate to block the opening at one end, one end of the loading piston faces the inner cavity of the test silo, and the pressure applying mechanism drives the loading piston to change its relative position and / or change the position of the test silo. The end face of the loading piston located in the silo outputs water pressure; the sensor of the monitoring mechanism is arranged inside the test silo through the side wall of the test silo, and the output end of the grouting mechanism faces the test silo. Use similar materials and adjust the strength and thickness to simulate the surrounding rock of the goaf under different geological conditions, and simulate the force of the surrounding rock in the goaf during actual engineering construction through hydraulic pressure and in-situ stress loading, so as to realize the analysis of the surrounding rock under different occurrence conditions Accurate demonstration of water inrush in goaf.

Description

technical field [0001] The present disclosure relates to the technical field of tunnel and underground engineering disaster control, in particular to a comprehensive test device and method for water inrush and grouting control in goaf. Background technique [0002] The statements in this section merely provide background related to the present disclosure and do not necessarily constitute prior art. [0003] Goaf refers to the cavity formed by man-made excavation or natural geological disasters, specifically including the cavity area left by underground mineral mining and its surrounding rock deformation, instability, displacement, cracking, breaking and caving, etc., which eventually cause the overlying rock and soil layers. Goaf water is formed after water accumulation in the areas where the overall surface deformation and damage occurs. The gob water has the characteristics of concentrated water volume, hidden location of the water accumulation area, and difficulty in dete...

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Problems solved by technology

At present, the research on the mechanism of water inrush in the goaf is mostly based on the actual engineering, and it is carried out by combining field investigation and numerical simulation, which is not universal. The research on the grouting treatment of the goaf is more concentrated in the filling and mining stage. , it is impossible to clarify the water inrush mechanism under various occurrence conditions in the goaf, and it is also impossible to detect the treatment effect under the control of water inrush and grouting. Grouting technology is widely used in the treatment of various water and mud inrush disasters, but Most of them are delayed processing, and there is a lack of research on grouting materials and technologies under the action of real-time dynamic water; in the existing patents, the critical condition of water inrush in gobs is reversely deduced by the amount of accumulated water when the maximum change is caused. Or three-dimensional solid-liquid coupling similar to the device and method for simulating the water accumulation in the goaf of the coal seam, which more accurately simulates the influence of the coal mining process on the state of the water accumulation in the goaf

These devices and methods have realized the simulation of goaf water inrush disasters to a certain extent, but the simulated situation is relatively single, and there is a lack of systematic research on the disaster-causing mechanism and corresponding grouting treatment of the specific situation of goaf water inrush. Research

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