Coal and gas co-mining three-dimensional physical simulation comprehensive experiment system

Abstract

The invention discloses a coal and gas co-mining three-dimensional physical simulation comprehensive experiment system, and belongs to the technical field of coal and gas safe co-mining. The system comprises a box, a hydraulic mining unit, a hydraulic loading unit, a ventilation roadway unit, a gas injection control unit, and a test unit. The first surface and third surface, which is opposite to the first surface, of the box are both provided with a gas testing hole. The second surface of the box is provided with an air inlet hole and an air return hole. The fourth surface of the box is provided with a wire outlet hole. The hydraulic mining unit comprises parallelly arranged hydraulic cylinders and support steel bars, and two hydraulic cylinders and the bottom of the box connect and support one steel bar. The hydraulic loading unit comprises a loading frame, which is arranged on the guide rails of the box. The guide rails are arranged on two sides of the box. The ventilation roadway comprises a roadway and a ventilating machine. A high pressure steel bottle in the gas injection control unit is communicated with a multi-way air distribution cabinet through an air distribution pipe, the air distribution pipe is communicated with a sub-pipeline; and the test unit comprises a gas testing unit, a stress testing unit, and a slight shock testing unit.

Description

technical field [0001] The invention belongs to the technical field of coal mining equipment, and more specifically relates to a three-dimensional physical simulation comprehensive experiment system for co-mining of coal and gas. Background technique [0002] my country is the world's largest coal-producing country, with coal output accounting for 48.3% of the world's total. At the same time, coal is my country's main energy source, accounting for 76% and 69% of the total primary energy production and consumption respectively. The large-scale mining of coal has made the depth of coal seam mining continuously deepened, and the gas pressure in the coal seam has increased sharply, resulting in a sharp increase in the amount of gas gushing out of the working face, serious gas dynamic phenomena appear frequently, and even gas combustion, explosion, and coal and gas outbursts Such vicious accidents seriously threaten the safe production of mines, causing heavy casualties, economic...

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Problems solved by technology

Field measurement research requires a long cycle, consumes a lot of manpower and material resources, is severely restricted by field conditions, and has relatively large limitations; and numerical simulation is still difficult to accurately deal with the physical properties of rock mass stress distribution after mining, large deformation, mobile damage, and backwardness. Changes and evolution processes such as pressure relief gas seepage and diffusion in fractures, lack of basic data such as the real original rock stress field, gas seepage field, and real rock mass physical and mechanical parameters necessary for accurate calculations, and the results often cannot reach the real " simulation"

Many achievements have been made in physical simulation experiments of similar materials at home and abroad. However, there is still a lack of physical simulation experiment systems for similar materials to simultaneously study the laws of stope overburden movement, fracture evolution, and pressure relief gas migration. Therefore, the existing 3D physics The simulation experiment platform has great limitations

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