Coal gangue yard smoldering fire area full-surrounding fire extinguishing treatment method

Abstract

The invention discloses a coal gangue yard smoldering fire area full-surrounding fire extinguishing treatment method. The coal gangue yard smoldering fire area full-surrounding fire extinguishing treatment method comprises the steps that curtain drilling holes are formed in the periphery of a smoldering fire area of a coal gangue yard, one-way grouting pipes are arranged, and segmented pressurization and repeated grouting are conducted to form curtains; shallow drill holes and deep drill holes are formed in a curtain area defined by the curtain drill holes at intervals, one-way grouting pipesare arranged in the shallow drill holes, segmented pressurization and repeated grouting are conducted to form a slurry cover, and the slurry cover and the curtain enclose and seal the fire area; grouting floral tubes are arranged in the deep drill holes, fire area gaps are fully filled with grouting, and slurry wrapping of the coal gangue is completed; deflation and temperature measurement drill holes are reserved in the curtain area in the treatment period; and finally, all the drilled holes are sealed, full-surrounding fire extinguishing of the smoldering fire area is completed, and a complete solidified body is formed in the treatment area. The hole depth of the curtain drill holes is larger than the maximum burial depth of the smoldering fire area, the shallow drill holes are drilled to the top of the smoldering fire area, and the deep drill holes penetrate through the smoldering fire area. According to the coal gangue yard smoldering fire area full-surrounding fire extinguishing treatment method, fire points in the coal gangue yard are thoroughly extinguished, the threat of the fire points to the ecological environment is eliminated, and the land can be reused.

Description

technical field [0001] The invention belongs to the field of geological disaster control, and in particular relates to a fire extinguishing control method for a fully surrounded smoldering fire area of ​​a coal gangue field. Background technique [0002] Coal gangue is a hard black and gray rock with low carbon content associated with coal seams, which is a solid waste compared with coal. The production of coal gangue in my country is relatively large, and the utilization rate is low. The coal gangue produced by coal mines in mountainous areas is basically discarded in ravines and covered with loess, while in plain areas, it is piled up on the ground, forming a cone-shaped gangue hill, which occupies valuable cultivated land. resources and affect the ecological environment. Coal gangue generally contains a certain amount of combustibles, which are prone to spontaneous combustion when conditions permit. Burning coal gangue will produce a large amount of smoke and dust, relea...

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Problems solved by technology

[0005] To sum up, the research on coal gangue spontaneous combustion fire zone has a long history, and there are many treatment methods, and the materials used also have their own advantages and disadvantages. The biggest disadvantage is that the previous grouting cannot form effective inclusions and coverings. The cost of using new grouting materials is relatively high. For example, the unit price per square meter of chemical grout for fire extinguishing even exceeds the unit price of gangue discharge

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