Coal mine explosion-proof sealed wall and construction method thereof

Abstract

The invention provides a coal mine explosion-proof sealed wall which comprises a roadway, two sealed walls, a filled wall and two grouting areas, two cutting grooves are formed in the periphery of theinner wall of a roadway sealing section needing to be sealed in parallel in the upward direction, the two sealed walls are arranged in the two cutting grooves respectively, and the filled wall is arranged between the two sealed walls; grouting areas are arranged on the side walls of the periphery of the roadway on the two sides of the two sealed walls respectively, a water discharging pipe, an observation pipe, a filling pipe, a goaf grouting or nitrogen injection pipe and an inspection pipe are sequentially arranged between the two sealed walls from bottom to top, a plurality of grouting pipes are arranged on the surface of the roadway in the circumferential direction of the roadway, one ends of the grouting pipes penetrate into the roadway by 2-5 m, and the other ends of the grouting pipes are connected with grouting equipment, and the filled wall is formed by filling flexible filling materials. The sealed wall constructed by the construction method of the coal mine explosion-proofsealed wall has the advantages of being good in sealing performance and high in explosion-proof capacity, and the strength and air tightness requirements can be met to the maximum degree through material combinations with different properties and different shrinkage rates.

Description

technical field [0001] The invention belongs to the technical field of filling and airtightness in the mining process of coal mines, in particular to an explosion-proof airtight wall of a coal mine and a construction method thereof. Background technique [0002] my country is rich in coal resources. Coal is the main energy source in our country and occupies a dominant position in the energy structure. The healthy, stable and sustainable development of the coal industry is a major issue related to national energy security. [0003] At present, underground coal mine airtight walls are generally divided into temporary airtight walls and permanent airtight walls. Permanent airtight walls are divided into explosion-proof airtight walls, fire-proof airtight walls, and water-blocking airtight walls according to their uses. At present, although there are many types of materials and methods for building airtight walls in China, there is no complete and unified design and technical s...

AI Technical Summary

Problems solved by technology

At present, most of the airtight walls of coal mines emphasize the strength index, so they are all constructed of rigid materials such as masonry and concrete, and even the thicker the better, but the rigid materials shrink after dehydration and drying or crack under the mine pressure, resulting in the airtightness of the airtight wall. reduce

Images