Mining foam paste filling material prepared by utilizing synergistic foaming method and preparation method thereof

Abstract

The invention discloses a mining foam paste filling material prepared by utilizing a synergistic foaming method and a preparation method thereof, which are widely suitable for filling of coal mine gob areas, closure of laneways and construction of underground firewalls. The filling material comprises a component A and a component B, wherein the component A comprises an active component, a fine aggregate, a mineral foaming agent, an activating agent, a coagulant and the like; and the component B comprises a foaming agent, a foam stabilizing agent, a water reducing agent and the like. The key point is as follows: after fly ash is activated, the fly ash can be used for replacing part of cement for being used as a cementing material; and in addition, a concrete foaming technology is applied to the filling material, and the mineral foaming agent is innovatively applied to work in coordination with a concrete foaming agent for foaming, so that the foaming expansion performance, pumping performance and anti-seepage performance of the filling material are improved on the original basis, a gob area with a larger space can be filled under the condition of low cement consumption, and low consumption, environmental friendliness, energy conservation and easiness in pumping are realized.

Description

technical field [0001] The invention belongs to the technical field of coal mine goaf filling, and relates to a mining foam paste filling material prepared by a cooperative foaming method and a preparation method thereof, which is widely applicable to coal mine goaf filling, roadway sealing and underground firewall construction. Background technique [0002] According to statistics, more than 30% of my country's total coal resource storage is buried under water bodies, under buildings, under roads and bridges (referred to as "three under") and other areas that are not suitable for mining or are not allowed to collapse after mining. With the reduction of open-pit coal mines and shallower coal resource reserves, the coal output rate has gradually failed to meet domestic production needs. Exploring how to develop and utilize deep and "three-down" coal resources and properly deal with follow-up issues has been received. The general concern of government departments, domestic rel...

AI Technical Summary

Problems solved by technology

Inspired by the above research results, the introduction of concrete foaming technology into the preparation of filling materials can effectively solve the problems of high cost and solid waste disposal, but there are still problems such as low foaming ratio of the filling body

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