Abstract: Provided are a multi-scale and multi-parameter collaborative testing device and method for true triaxial hydraulic fracturing. The method includes: processing a retrieved rock sample, forming a fracturing port on the top surface of a rock specimen, placing a fracturing pipe in a hole, and connecting the fracturing pipe to a high-pressure water supply pipe; installing and connecting sensors on pressure plates, connecting wires, and turning on testing devices; sealing an airtight chamber, filling oil into the airtight chamber until the airtight chamber is full of oil, and keeping a room temperature constant; turning on a water supply device, starting hydraulic fracturing, and turning on testing modules at the same time; and stopping hydraulic fracturing after complete fracture of the specimen, returning oil to an oil tank, opening the airtight chamber to take out the specimen for observation and photographing, and performing data processing and analysis at the same time.

Abstract: Disclosed is a suitability evaluation method for developing underground coal gasification (UCG) engineering by utilizing a deep coal seam, including: acquiring basic geological conditions, engineering geological problems, hydrogeological conditions, contained coal quality, deep coal seam conditions, and heat and syngas components of unit coal gasification in a deep coal seam region to obtain scores of corresponding influencing factors; determining impact indexes of the geological condition and influencing factors; and determining the suitability of developing UCG engineering by utilizing the deep coal seam according to a comprehensive impact index. The suitability of developing UCG engineering by utilizing the deep coal seam is evaluated by a comprehensive analysis method.

Abstract: The present disclosure provides a test system and a method for measuring efficiency of underground coal gasification, and relates to the technical field of underground coal gasification, comprising a gasification agent supply system, a gasifier, an outlet and recycling system and a monitoring system, wherein the gasification agent is mainly injected into the gasifier and then chemically reacts with the coal by igniting the gasifier at a high temperature to generate gas, while after the gas passes through the outlet and recycling system, the composition and content are measured, and the monitoring system monitors an operating state of the gasifier, injection of the gasification agent and production of gas, temperature change in the gasification channel and ignition temperature and pressure gauge data.

Abstract: A device for measuring a flow velocity and a flow direction and geological parameters of groundwater through cross holes of deep wells includes detectors and a device for throwing the tracer source. A method includes measuring a correspondence between a conductivity and a concentration of a tracer solution at different temperatures in a laboratory; selecting at least two boreholes; selecting a target aquifer section; placing the detectors in the target aquifer section in the hole to test a conductivity background value and a temperature value; using the device for throwing the tracer source to place the tracer solution in the hole for throwing the tracer source, and using the detectors to measure a water conductivity and temperature in a detection hole, to obtain a distribution curve of a tracer solution solubility with time; performing cross-test, and calculating the seepage flow velocity and flow direction of groundwater in the hole.

Abstract: The present disclosure provides an artificial intelligence detection system for deep-buried fuel gas pipeline leakage, including a multi-field source information collecting system, a data processing and analyzing system, and a monitoring and warning system, wherein the multi-field source information collecting system includes a concentration field collecting subsystem, a temperature field collecting subsystem, and a geoelectric field collecting subsystem; the concentration field collecting subsystem collects concentration field data; the temperature field collecting subsystem collects temperature field data; the geoelectric field collecting subsystem collects geoelectric field data; the data processing and analyzing system receives the concentration field data, temperature field data and geoelectric field data, calculates variations of the respective data, compares the variations with corresponding variation thresholds, and determines whether to generate a warning signal; the monitoring and warning system ala

Abstract: A device for measuring a flow velocity and a flow direction and geological parameters of groundwater through cross holes of deep wells includes detectors and a device for throwing the tracer source. A method includes measuring a correspondence between a conductivity and a concentration of a tracer solution at different temperatures in a laboratory; selecting at least two boreholes; selecting a target aquifer section; placing the detectors in the target aquifer section in the hole to test a conductivity background value and a temperature value; using the device for throwing the tracer source to place the tracer solution in the hole for throwing the tracer source, and using the detectors to measure a water conductivity and temperature in a detection hole, to obtain a distribution curve of a tracer solution solubility with time; performing cross-test, and calculating the seepage flow velocity and flow direction of groundwater in the hole.