Goaf water inrush and grouting treatment comprehensive test device and method

Abstract

The invention provides a goaf water inrush and grouting treatment comprehensive test device and method, and relates to the technical field of tunnel and underground engineering disaster governance. The goaf water inrush and grouting treatment comprehensive test device comprises a loading mechanism, a grouting mechanism and a monitoring mechanism, wherein the loading mechanism comprises a pressure applying mechanism, a test silo and a loading piston, the test silo is provided with a cover plate capable of detachably plugging an opening in one end of the test silo, 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 the relative position with the test silo and / or change the end face output water pressure of the loading piston in the silo; and a sensor of the monitoring mechanism penetrates through the side wall of the test silo to be arranged in the test silo, and the output end of the grouting mechanism faces the test silo. Similar materials are adopted, goaf surrounding rocks under different geological conditions are simulated by adjusting the strength and the thickness of the similar materials, the stress condition of the goaf surrounding rocks during actual engineering construction is simulated through water pressure and ground stress loading, and accurate demonstration of goaf water inrush under different occurrence conditions is achieved.

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 a goaf. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may 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 mining and its surrounding rock deformation and instability, displacement, cracking, crushing and collapse, etc., eventually causing the overlying rock and soil layer to collapse. Goaf water is formed after accumulated water in the area where the overall surface deformation and destruction occurs. The gob water has the characteristics of concentrated water volume, concealed location of the water accumulation are...

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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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