The deep coal seam gas drainage simulation test system is an experimental device used to study gas flow, pressure changes, stress-strain relationships, and permeability changes during the extraction of deep coal seam gas. This system can simulate the actual extraction environment of deep coal seam gas, including complex conditions such as high temperature, high pressure, and multiphase flow, providing a scientific basis for the research and development and optimization of coal seam gas extraction technology. The system consists of several core modules, including an intermediate container, a stress testing core holder, a strain gauge, a pressure regulating valve, an automatic pressure tracking pump, a gas pressurization system, and a data acquisition system, enabling precise control and real-time monitoring of the coal seam gas drainage process.

Main Technical Parameters
1. Intermediate Container: Capacity: 1000ml; Working Pressure: 55MPa; Material: 316L stainless steel
2. Stress Testing Core Holder: Confining Pressure: 55MPa (individually loaded); Axial Pressure: 55MPa (individually loaded); Core Specification: φ50×100mm; Displacement Sensor Accuracy: 0.001mm; Temperature Range: 120℃; Material: 316L stainless steel
3. Gas Pressurization System: Maximum Drive Gas Pressure: 0.8MPa; Maximum Output Pressure: 40MPa
4. Back Pressure Control System: Working Pressure: 0～70MPa, Accuracy: 0.25 grade
5. Gas-Liquid Separation System: Atmospheric pressure, gas flow meter optional, test port reserved