Composite material for mining and method for preparing steel structure and wooden stack erection from it

Abstract

The invention provides a mine composite material and a steel structure preparation and wood stack building method using the mine composite material. The mine composite material is prepared from the following components in percentage by weight: 20 to 40% of isocyanate, 20 to 40% of polyether glycol, and 20 to 60% of fly ash, wherein the contents of a catalyst and a thinner respectively account for 0.1 to 1.0% and 0.5 to 2% of isocyanate and polyether glycol. The mine composite material is used for preparing the steel structure to build a #-shaped wood stack. The mine composite material has the advantages that a pressure block is made of organic and inorganic composite materials with high property, the toughness is good, and the compression rate is 40% or above; the compressive strength is equivalent to the strength perpendicular to the grain of wood, and the weight of the pressure block is lighter; the pressure blocks are connected by a reinforcing bar or an anchor bar as a tension element to form the mine composite material steel structure, the tension property is better than the tension property of wood beams, the stability and bearing property of the wood stack are stronger, and the cost is saved by 50% compared with the wood stack built by the wood.

Description

technical field [0001] The present invention relates to the field of mine roadway roof support, in particular to an alternative to the method of erecting wooden piles with wooden beams in mine roadways, in particular to a mining composite material, and a method and utilization of the steel structure prepared from the mining composite material The method for erecting wooden stacks of the steel structure. Background technique [0002] Due to the impact of ground pressure or strong mining in mine roadways, the roof sinks a lot, and short wooden beams are often used to support the roof by erecting wooden piles in the shape of a "well", mostly larch, yellow pine, oak wood , willow, and locust tree are used as raw materials. Due to the good toughness of the horizontal grain of the wood under pressure, and the good load-bearing performance of the wood stack structure, it is widely used in mines, but the method of erecting the stack with short wooden beams requires consumption A la...

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Problems solved by technology

[0002] Due to the impact of ground pressure or strong mining in mine roadways, the roof sinks a lot, and short wooden beams are often used to support the roof by erecting wooden piles in the shape of a "well", mostly larch, yellow pine, oak wood , willow, and locust tree are used as raw materials. Due to the good toughness of the horizontal grain of the wood under pressure, and the good load-bearing performance of the wood stack structure, it is widely used in mines, but the method of erecting the stack with short wooden beams requires consumption A large amount of high-quality wood destroys the ecological environment, and the cost is high, and the wood stacks erected with wood have serious defects such as easy corrosion, flammability, and affecting roadway ventilation, which poses a great safety hazard to mine production

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