Carbon dioxide pressure releasing and fire fighting technology and equipment for goafs

Abstract

The invention discloses a technology and equipment for carbon dioxide pressure releasing and fire fighting in the goafs. The coal sample is collected at the coal mine field, the ignition point temperature of the coal sample is determined, then the critical temperature of the pressure releasing is set, the bursting disc of the pressure releasing tank is selected, and the filling of carbon dioxide and the laying of the carbon dioxide pressure releasing tank are carried out. When the mined-out coal is oxidized to the critical temperature in the goafs, the bursting disc is broken, and the pressure releasing tank can release a large amount of carbon dioxide gas, forming a low-oxygen environment, restraining the oxidation temperature rise in the high-temperature area of the goafs and realizing the prevention and control of spontaneous combustion of the mined-out coal in the goafs, so as to ensure the safe recovery of the working face. At the same time, through the transmission of wireless monitoring data, the risk of spontaneous combustion of the mined-out coal in the goafs can be analyzed. In comparison with that traditional fire-extinguishing technology in goafs, the invention is convenient in operation, simple in technology and better in the prevention and control effect on the spontaneous combustion disaster caused by mined-out coal.

Description

technical field [0001] The invention relates to the technical field of prevention and control of coal spontaneous combustion in goafs of coal mines, in particular to a carbon dioxide pressure relief and fire prevention technology and equipment in goafs. Background technique [0002] In the production process of the coal mine industry, the spontaneous combustion of coal left in the goaf is one of the most important natural disasters in the coal mine production industry, which poses a great threat to the safe mining of the working face. The residual coal in the gob area will oxidize and heat up and spontaneously ignite, leading to a fire in the goaf. The spontaneous combustion of coal may lead to the forced closure and shutdown of the entire working face and even the entire mine, affecting the normal development of the enterprise. [0003] According to the existing data, the current prevention and control technologies for coal spontaneous combustion in goafs mainly include ni...

AI Technical Summary

Problems solved by technology

The residual coal in the gob area will oxidize and heat up and spontaneously ignite, leading to a fire in the goaf. The spontaneous combustion of coal may lead to the forced closure and shutdown of the entire working face and even the entire mine, affecting the normal development of the enterprise

[0003] According to the existing data, the current prevention and control technologies for coal spontaneous combustion in goafs mainly include nitrogen injection to prevent fire extinguishing, gel foam to prevent fire extinguishing, etc. These technologies are all injected into the gob area to prevent fire extinguishing materials Although it can prevent and control the spontaneous combustion of residual coal within a certain range in the goaf behind the working face, it has relatively large limitations. First, the process is complicated, and injection equipment and pipelines need to be arranged underground. , a serious waste of manpower and material resources

At the same time, the above-mentioned technologies usually only choose to inject fire-proof and extinguishing materials at both ends of the working face, which results in a limited range of prevention and control areas. For most areas in the middle of the goaf and deeper areas of the goaf The prevention and control of spontaneous combustion of residual coal is less considered, so the control effect is not ideal

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