Device and method for simulating reservoir damage in coal bed gas drainage and mining

The invention belongs to the field of coal bed gas exploration and development, and particularly relates to a device and method for simulating reservoir damage in coal bed gas drainage and mining. The device comprises a fan-shaped toughened glass tank and a simulation shaft which is made of a transparent material and is communicated with the toughened glass tank, the top of the tempered glass groove is covered with a fan-shaped steel plate, and the edge of an opening in the top of the tempered glass groove and the edge of the fan-shaped steel plate are connected in a sealed mode through sealing rubber cloth. A hydraulic device is arranged above the fan-shaped steel plate, and a hydraulic rod of the hydraulic device is arranged downwards and connected with the top of the fan-shaped steel plate. One side of the arc surface of the tempered glass groove is connected with a first methane storage tank through a pipeline, the pipeline is connected with a second switch and a first gas booster pump in series, and one