Performance determining system and test method for fire preventing and extinguishing spraying material of flammable coal seam

Abstract

The invention relates to a performance determining system and test method for a fire preventing and extinguishing spraying material of a flammable coal seam. The determining system includes a physicalmodel, the polygonal physical model includes a top cover, a model roadway penetrates through the physical model, first high-temperature-resistant temperature measuring probes are uniformly distributed in the model roadway, each first high-temperature-resistant temperature measuring probe is connected with a temperature indicating gauge, small holes are uniformly distributed in the periphery of the model roadway, one small hole is an ignition hole, the other small holes are monitoring holes, each detection hole is connected with a gas detector, each monitoring hole is internally provided witha second high-temperature-resistant temperature measuring probe, and the second high-temperature-resistant temperature measuring probes are connected with a temperature display instrument; and the physical model is provided with an air supply hole and an air measuring hole, the two ends of the air supply hole are located near the ignition hole and outside the physical model respectively, one end of the air measuring hole is located inside the model roadway, the other end of the air measuring hole is located outside the physical model and connected with a multifunctional gas detector, and a pressure gauge is installed at the tail end, close to the air supply hole, in the model roadway.

Description

technical field [0001] The invention relates to a performance measurement system and test method of a fire prevention and extinguishing spraying material for a flammable coal seam, and is especially suitable for measuring performances such as wind resistance, heat insulation, and harmful gas isolation of a gob-side entry retention spraying material for a flammable coal seam. Background technique [0002] Coal is the main energy source in our country and occupies an important position in the energy structure of the national economy. Therefore, the safe and efficient mining of coal is particularly important. Mine fire is one of the main natural disasters in coal mines, and coal spontaneous combustion is the main form of mine fires. Among the key state-owned coal mines in my country, more than 56% of the mines have the risk of spontaneous combustion and fire. Fires caused by coal spontaneous combustion can be Accounted for more than 60% of the total number of mine fires. [000...

AI Technical Summary

Problems solved by technology

The anti-fire extinguishing performance of spraying materials is one of the main factors influencing the wind-proof effect of gob-side entry retention. At present, there are many researches on the properties of fire-proofing spraying materials used in mines, but there is a lack of performance measurement systems and test methods for fire-proofing spraying materials. Publication number CN203037639U Although this invention can measure the air blocking performance of the material, it cannot me

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