Multi-field precursor information evolution test device and test method for large-size fractured rock rectangular cavity water inrush

Abstract

The invention discloses a multi-field precursor information evolution test device and test method for a large-size fractured rock rectangular cavity water inrush and relates to the field of rock mechanics and pressure-bearing penetration tests. The device comprises a test rack, a loading plate, a sample storage cavity, a side pressure loading system, a vertical loading system, a water pressure loading system, a water temperature adjusting system and a signal acquisition and processing system. After preparing of a large-size rock sample containing a rectangular cavity and a single fracture, thetest device and the test method can be used for researching evolution rules, coupling characteristics and influence factors of multi-field precursor information such as the single fracture surrounding rock stress, displacement, fracture, seepage and temperature in the water inrush process at different excavation depths of the rectangular cavity under water-force coupling. The water pressure loading system, the water temperature adjusting system and the side pressure loading system of the test device can better simulate the geomechanical environment of the fault-containing coal measure strataon the confined water, invert and analyze the mining fault water inrush mechanism in the deep confined water stoping working face so as to monitor and early warn mining fault water inrush.

Description

technical field [0001] The invention relates to the field of rock mechanics and pressure-bearing seepage tests, in particular to a test device and a test method for the evolution of multi-field precursory information of water inrush in rectangular cavities in large-scale fissure-containing rocks. Background technique [0002] my country is rich in coal resources, but the geological conditions are complex, which makes geological disasters occur frequently in coal mining. With the increase of coal mining depth and mining intensity, the threat of the underlying austrian limestone karst water to the working face is becoming more and more serious, especially in the mining face with deep fault structures, the problems of water inrush prediction and prevention are more prominent. [0003] Fault water inrush is an important form of coal mine water inrush, which is highly concealed and difficult to determine. It is easy to cause major water inrush accidents and seriously threatens th...

AI Technical Summary

Problems solved by technology

However, this test device can only test and study complete layered rocks, and cannot study rocks with structural cracks such as faults; in addition, this test device can only test and study the stress, strain and permeability of layered rocks in the process of pressure seepage failure , it is impossible to test and study the time-space evolution law, coupling characteristics and influencing factors of multi-field precursor information such as stress, displacement, fissure, seepage, temperature, etc. Evolution information of temperature in the process of pressure seepage failure

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