Inorganic Fiber Reinforced Expansive Compression Resistant Borehole Sealing Material

Abstract

The invention relates to an inorganic fiber reinforced expandable pressure-resistant borehole sealing material which is characterized by comprising the following substances in parts by weight: 1-3 parts of inorganic short fiber, 60-70 parts of aluminate cement, 10-13 parts of anhydrous gypsum, 13-17 parts of bentonite, 1.5-2.5 parts of polycarboxylic high performance water-reducing agent and 2-3 parts of carboxymethylcellulose. When the material is used, water is added into the material according to a certain mass ratio, the water and the material are uniformly mixed and pressurized by using an air pump, and then, the material is filled into a borehole. According to the invention, the inorganic fiber is used as a reinforcing agent of filler, so that the compressive strength of the filler is improved well; due to the addition of the anhydrous gypsum, the filler can not shrink and can expand a little after being solidified, so that better filling and waterproof effects are achieved; due to the addition of the bentonite, the material is expandable and more uniform, and meanwhile, the slurry property of a water mixed solid material can be improved; and due to the addition of the polycarboxylic high performance water-reducing agent and the carboxymethylcellulose, the initial setting time of the filler can be shortened, and the flowability and stability of the mixed slurry can be improved. By using the material, the requirements for sealing, pressure resistance, water resistance and the like of an underground gas pumping / exhaust hole can be met.

Description

technical field [0001] The invention relates to a drilling sealing material, in particular to an inorganic fiber-reinforced expansion and compression-resistant drilling sealing material. Background technique [0002] In high-gas mines, the gas control method that drains underground gas to the ground through large-diameter drainage holes and utilizes it has been more and more widely used because of its low comprehensive cost and good effect. However, the sealing problem of the gas drainage holes has always plagued construction. . The commonly used methods are polyurethane foam materials, expansive cement and other materials, but there are still various problems in the process of use, such as polyurethane foam materials, although the foaming speed is fast and the volume expansion rate is high, but its compressive strength is low by 2.5 to 4.0 MPa, the foaming expansion process is accompanied by a large amount of heat release, and the flame retardant effect is low, and a large...

AI Technical Summary

Problems solved by technology

[0002] In high-gas mines, the gas control method that drains underground gas to the ground through large-diameter drainage holes and utilizes it has been more and more widely used because of its low comprehensive cost and good effect. However, the sealing problem of the gas drainage holes has always plagued construction.

The commonly used methods are polyurethane foam materials, expansive cement and other materials, but there are still various problems in the process of use, such as polyurethane foam materials, although the foaming speed is fast and the volume expansion rate is high, but its compressive strength is low by 2.5 to 4.0 MPa, the foaming expansion process is accompanied by a large amount of heat release, and the flame retardant effect is low, and a large amount of use will pose a threat to underground safety production; general expansive cement and other materials have a low expansion rate and unevenness, and the compressive strength is also average, so it will be used later. There are gas and water seepage problems