The High-Temperature High-Pressure Coal-Rock Sensitivity Testing System is an advanced scientific research device used to simulate the coal-rock environment under high-temperature and high-pressure conditions to conduct coal-rock permeability and sensitivity tests. It consists of several key components, including a core holder, displacement pump, confining pressure automatic tracking pump, back pressure control system, temperature control system, pressure measurement system, and data acquisition system. These components work together to precisely control and monitor the physical and chemical changes of coal-rock under high-temperature and high-pressure conditions, providing a scientific basis for coalbed methane development and reservoir evaluation.

Main Technical Parameters

1. Core Holder: Confining pressure: 55 MPa; Displacement pressure: 52 MPa; Operating temperature: 150 ℃; Specification: φ50X (25～100 mm); Material: Hc276 (Hastelloy)
2. Displacement Pump Performance: Operating pressure: 0～70 MPa; Accuracy: 0.25 level; Flow rate: 0.001～30 ml/min; Accuracy: ≤±0.3%
3. Confining Pressure Automatic Tracking: Pump operating pressure: 0～70 MPa; Accuracy: 0.25 level; Flow rate: 0.001～30 ml/min; Pump head material: 316L; Single cylinder volume: 100 ml; Power: 450 W; Control gas source: Air or nitrogen; Pressure: 0.6 MPa
4. Back Pressure Control System: Composed of an automatic back pressure pump, buffer container, inlet back pressure valve, and pipelines
Back pressure range: 0-70 MPa; Buffer tank volume: 200 ml; Back pressure valve material: Hastelloy H276
5. Temperature Control System: Constant temperature box working space volume: 1200X600X800 mm; Working space material: 316L stainless steel, PTFE spray coating; Temperature range: Room temperature - 150 ℃; Temperature accuracy: ±1 ℃