Coal-bed gas seepage experimental device under action of controllable high-power sound wave

Abstract

The invention discloses a coal-bed gas seepage experimental device under action of controllable high-power sound wave. The device comprises a coal sample chamber, a gas supply system, a flow measurement system, a vacuum pumping system, a sound wave generation system, a temperature monitoring system and a stress loading system, wherein sealing covers are arranged at two ends of the coal sample chamber, respectively; the sealing covers are detachably connected with the coal sample chamber; the sound wave generation system comprises a sound wave generator and a transducer which is connected with the sound wave generator; the transducer is arranged on the sealing cover; the temperature monitoring system comprises a temperature sensor; the temperature sensor is arranged in the coal sample chamber; the stress loading system comprises a lifting jack and a pressurization tray connected with the lifting jack; the pressurization tray is arranged in the coal sample chamber; an air hole is formed in the pressurization tray. According to the device, the seepage rule of coal-bed gas in large test-piece coal can be simulated under the actions of stress, air pressure and sound field coupling, and a heat effect and the temperature influence range and change rule of a coal-gas system can be simulated under the action of high-power sound wave.

Description

technical field [0001] The invention relates to a coal bed gas seepage test device, in particular to a coal bed gas seepage test device under the action of controllable high-power sound waves. Background technique [0002] Coalbed methane is a new energy source strategically replaced by my country, and its reserves are about 30 trillion m at a depth below 2000m 3 , equivalent to my country's onshore conventional natural gas resources, it is a relatively clean energy and mineral resources and chemical raw materials that can be controlled, and secondly, coalbed methane is a harmful source of major coal mine disasters and accidents. According to statistics, coalbed methane disasters account for about 70% of major coal mine disasters. Meanwhile, its main component CH 4 is a ratio of CO 2 A strong greenhouse effect gas more than 20 times higher. Therefore, from the perspective of resource utilization, safe production and environmental protection, it is imperative to develop c...

AI Technical Summary

Problems solved by technology

At present, the adsorption, desorption, and seepage characteristics of coalbed methane under the action of sound waves, and the mechanism of improving the recovery rate of coalbed methane are rarely studied at home and abroad, and the laboratory research devices are rarely developed.

Images