Surrounding rock weathering simulation device and surrounding rock weathering simulation method for underground roadways

Abstract

The invention discloses a surrounding rock weathering simulation device and a surrounding rock weathering simulation method for underground roadways, and is applicable to weathering simulation of easily-weathered roadway surrounding rock in mine shafts. The surrounding rock weathering simulation device comprises a constant temperature system, a constant temperature and humidity system, a weathering system, a ventilation system and a data acquisition system. The surrounding rock weathering simulation method includes putting a test piece simulating the surrounding rock of the roadways into a sealing box and fastened, sequentially turning on the constant temperature system and the constant temperature and humidity system, setting the temperature and the humidity as standard values specified by an experiment, and turning on the data acquisition system; turning on a negative-pressure fan to start the weathering simulation experiment, wherein the data acquisition system monitors temperature,humidity and wind speed of gases flowing into the test piece in real time, and observes and records surface weathering changes at different time through a camera in real time. The surrounding rock weathering simulation device and the surrounding rock weathering simulation method have the advantages of visually-observed detection result, high precision, modularized design, easiness in operation and low cost.

Description

technical field [0001] The invention relates to an experimental device and method for simulating the weathering of the surrounding rock of an underground roadway, and is especially suitable for the simulation research on the weathering of the surrounding rock of the easily weathered roadway in the mine. Background technique [0002] The geological conditions of my country's coal mines are complex, and weathered roadways are widely distributed. The underground air humidity is high, the roadway wind speed is high, and the roadway ventilation temperature difference is large in winter and summer. Long-term weathering will lead to the destruction of the original structure and structure of the roadway surrounding rock, secondary changes in mineral composition, and the porosity of the coal rock mass. In addition, due to the influence of excavation and other engineering disturbances, the surrounding rock is loosely broken and expanded to a depth of 6-10m, which greatly weakens the s...

AI Technical Summary

Problems solved by technology

The underground air humidity is high, the wind speed of the roadway is high, and the temperature difference of the roadway ventilation in winter and summer is large. Long-term weathering will lead to the destruction of the original structure and structure of the surrounding rock of the roadway, and secondary changes in the mineral composition, making the porosity of the coal rock mass In addition, due to the influence of excavation and other engineering disturbances, the loose and broken expansion depth of the surrounding rock is as long as 6-10m, which greatly weakens the strength and bearing structure of the surrounding rock, reduces the stability of the surrounding rock of the roadway, shortens the The service life of the roadway is shortened, the maintenance cost of the roadway is increased, and even safety accidents caused by the roof fall and instability of the surrounding rock slabs are caused.

[0003] At present, the research on the weathering of roadway surrounding rocks mainly focuses on the research on the support technology of weathered roadways, lack of research on the weathering process of roadway surrounding rocks, and the lack of experimental devices and methods related to the simulation of roadway surrounding rock weathering

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