A mine pressure similar simulation pneumatic support system and control method

Abstract

The invention discloses an analog simulation pneumatic support system for mine ground pressure and a control method. The support system comprises a support structure, an air channel structure and an operation control table. The support structure comprises two air cylinders, a rectangular support base, a rectangular support top beam, a rectangular connecting plate and a rectangular shield beam. The air channel structure comprises a pressure regulating filter, a one-way valve, a five-port two-position direction control valve, a first one-way throttling valve, a second one-way throttling valve, a two-port two-position normally-closed fluid control valve, a pressure release valve and an air pressure transmitter. An air source connector, a power supply port, a switching power supply, a pressure regulating filter, an air switch, a lifting switch, an air cylinder A-port switch and a paperless recorder are arranged on the operation control table. The air source connector is connected with an external air compressor, and the power supply port is connected with an external power supply. A pneumatic system of the analog simulation pneumatic support system for mine ground pressure has the advantages of being small in size, accurate in supporting force, simple, environmentally friendly and low in cost and has flexible action.

Description

technical field [0001] The invention relates to an experimental system and method, in particular to a mine pressure similar simulation support system and method, belonging to the field of mining engineering. Background technique [0002] In scientific research in the field of mining engineering, physical similarity simulation, as an efficient and concise experimental method, provides inspiration and basis for theoretical research on rock formation movement, fracture development, surface settlement, and stress distribution in mining. In terms of studying the overlying rock movement law during the advancing process of the working face, most of the similar simulation experiments do not set support devices in the stope at present, which is inconsistent with the facts. In the bracket-surrounding rock system, the bracket and the surrounding rock interact with each other—the movement state of the surrounding rock affects the working condition and bearing characteristics of the brac...

AI Technical Summary

Problems solved by technology

[0006] In terms of stope support, the rigid support device is far from the working characteristics of the prototype hydraulic support, and even misleads the research

The disadvantages of the small hydraulic support used in the teaching and experiment include: (1) The external dimensions are still too large to be used in the actual physical similar simulation test; (2) The pressure control of the manual hydraulic pump is unstable; (3) The hydraulic system is complicated , Huge equipment, high manufacturing, use and maintenance costs; (4) Omission of emulsion, polluting the environment

(5) The working performance of the non-fluid simulation support does not match the constant resistance increase characteristics of the prototype, etc.

[0007] In terms of stope stress monitoring, traditional experiments often bury pressure cells at intervals on the coal seam floor. Through the stress changes of the pressure cells, only the goaf compaction, coal body advanced support pressure, stope floor stress, etc. based on floor stress can be monitored. monitoring, but the pressure on the roof of the working face cannot be monitored

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