Open a closed digging into the roadway and treat the method of high -concentration of hydrogen sulfide and gas

Abstract

The invention provides a closed excavation roadway opening and high concentration hydrogen sulfide and gas treatment method. The closed excavation roadway opening and high concentration hydrogen sulfide and gas treatment method comprises opening a closed door after the harmful gas in the closed area is extracted through a gas extraction system; connecting a pressure ventilation pipe into a roadway in a sectioned mode and simultaneously discharging the harmful gas until the pressure ventilation pipe is connected into a roadway moraine head; exhausting the air of the excavation roadway moraine head into a closed air return roadway and discharging the harmful gas only through a pressure fan when the gas overruns or the gas and the hydrogen sulfide overrun, wherein the exhausted air is more than two times of the pressed air of the pressure fan; arranging a lime water nozzle in an open air return roadway, spraying out the lime water and neutralizing the hydrogen sulfide; spraying the lime water on the wall of the closed air return roadway; sprinkling lime powder on a base plate of the excavation roadway. According to the closed excavation roadway opening and high concentration hydrogen sulfide and gas treatment method, the excavation roadway which is closed in an emergency mode due to the fact that the high concentration hydrogen sulfide and gas is excavated is safely opened again and accordingly the mineral loss in the area is avoided.

Description

technical field [0001] The invention relates to a coal mining technology. Background technique [0002] A certain amount of natural sulfur can be formed during the formation of coal rock formations, and some of these natural sulfur exist in the form of gas (ie hydrogen sulfide gas). Hydrogen sulfide is a colorless, odorous and toxic gas with a specific gravity of 1.19 and is easily soluble in water. Low-concentration hydrogen sulfide gas can cause eye and respiratory irritation symptoms, and prolonged exposure may cause pulmonary edema, pneumonia, headache, vomiting, nausea, etc.; high-concentration hydrogen sulfide gas immediately paralyzes the olfactory nervous system, causing instantaneous brain death. Hydrogen sulfide gas usually occurs in rock cracks or caves, and hydrogen sulfide gas has been formed into a compressive gas under the action of formation pressure, which can be dissolved in about 2.5~4.0m3 per cubic meter of water. 3 Once the hydrogen sulfide gas is rele...

AI Technical Summary

Problems solved by technology

[0012] If the excavated coal mine roadway encounters the above-mentioned emergencies, for the sake of safety, the tunnel can only be permanently closed with an airtight door. In this way, the excavated roadway will be invalidated, and the previous mining work investment cannot be recovered. At the same time, The coal seams in this area are also unable to be mined, causing huge losses to the coal mines

Therefore, although there are few mines with high concentrations of hydrogen sulfide and gas at the same time, once this happens, it will bring huge losses