Mine timber substitute material and preparation method thereof

Abstract

Relating to the technical field of novel building materials, the invention discloses a mine timber substitute material and a preparation method thereof. The mine timber substitute material is mainly composed of a main material, fiber and a composite admixture three components. Specifically, the main material contains 100 parts of magnesium oxide powder, 70-90 parts of a magnesium chloride hexahydrate solution, 10-15 parts of fly ash, 12-15 parts of sawdust, and 5-8 parts of water. The composite admixture includes 1-4 parts of a water reducing agent, 0.2-0.4 part of a retarder, and 2-4 parts of a modifier. The fiber contains 2-4 parts of glass fiber and 25-45 outers of bamboo. According to the invention, magnesium oxychloride cement with high compressive strength and high bending strength is combined with sawdust, fly ash and other solid waste together, the material cost is low, the preparation method is simple and practicable, and has low requirements for production equipment and staff, also the production cycle is short, and the whole process does not produce the three wastes, thus having no influence to the environment and worker health.

Description

technical field [0001] The invention relates to the technical field of new building materials, in particular to a pit wood substitute material and a preparation method thereof. Background technique [0002] When mining coal with a large mining height working face, in order to prevent gas from protruding, a gas tail lane must be left at the end of the working face. In order to ensure the ventilation of the upper corner of the tail of the working face, wood stacks were built at the tail of the machine to reserve ventilation channels, and the wood stacks were no longer recycled. Assuming that the stack height is 4.5m, and the plate girder specification is R(150~200)×1500mm, each stack needs to consume 3.18~4.24m 3 Timber, so that the wood consumption per kilometer is 1272 ~ 1696m 3 , the processing cost of wood is not considered, only the direct cost of logs is 1200 yuan / m 3 Calculated, the cost of purchasing wood for every 1000m of roadway is 1.53-2.04 million yuan. The co...

AI Technical Summary

Problems solved by technology

The consumption of such a large amount of wood will not only consume a large amount of forest resources, which is not conducive to environmental protection, but will also bring a greater economic burden to the mine

Images