Colloid foam material for preventing and controlling coal spontaneous combustion and preparing method of colloid foam material

Abstract

The invention provides a colloid foam material for preventing and controlling coal spontaneous combustion. The colloid foam material is prepared from the following ingredients in parts by weight: 100 parts of water, 0.3 to 0.5 part of xanthan gum, 0.3 to 0.5 parts of chitosan, 0.4 to 0.6 part of sodium carboxymethyl starch and 0.4 to 0.6 part of dodecyl dimethyl ammonium chloride. The colloid foam material for preventing and controlling coal spontaneous combustion can effectively prevent and control the coal spontaneous combustion, can also be used for on-site fire extinguishment, has the characteristics of high foaming coefficient, high stability, non-dehydration, low consumption, low cost, safety, environment-friendly property and the like, and has wide application prospects. The invention also provides a preparing method of the colloid foam material for preventing and controlling coal spontaneous combustion. The method has the advantages that the process is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of colloidal foam materials, in particular to a colloidal foam material used in coal mines to prevent coal spontaneous combustion and a preparation method thereof. Background technique [0002] Coal spontaneous combustion is one of the main natural disasters in coal mining in my country. In recent years, with the vigorous promotion and application of fully mechanized top-coal caving technology, coal production efficiency has been greatly improved, but this method has a large caving height, a large amount of residual coal left in the goaf, and serious air leakage, which makes coal seam spontaneous combustion serious. . State-owned key coal mines close more than 100 working faces every year due to spontaneous combustion fires, often causing tens of millions of fully mechanized mining and fully mechanized caving equipment to be closed in the fire area, a large amount of coal is frozen, and reasonable developme...

AI Technical Summary

Problems solved by technology

State-owned key coal mines close more than 100 working faces every year due to spontaneous combustion fires, often causing tens of millions of fully mechanized mining and fully mechanized caving equipment to be closed in the fire area, a large amount of coal is frozen, and reasonable development deployment and mining sequence are disrupted chaos, which brought huge losses to the mine; secondly, the spontaneous combustion of coal produced a large amount of toxic and harmful gases, seriously polluting the environment

At the same time, for high gas or outburst mines, if the prevention and control of coal spontaneous combustion is not in place, it is easy to cause a gas explosion due to coal spontaneous combustion, causing casualties

At present, the commonly used coal spontaneous combustion prevention and control technologies at home and abroad include grouting, nitrogen injection, foam injection, inhibitor spraying, gel injection and composite colloid, etc. These fire prevention and extinguishing technologies have played an important role in ensuring the safety of coal mine production. There are some deficiencies, such as: grouting, the slurry only flows to the low-lying parts, and cannot prevent and control the middle and high-level coal bodies; nitrogen injection, nitrogen is easy to diffuse with air leakage, and is not easy to stay in the fire zone; foam injection, foam stability is poor , generally all shattered within 6 to 8 hours; injecting inhibitors, inhibitors will corrode downhole equipment; injecting gel and composite materials costs more, injection flow rate is small, fluidity is poor, and it is difficult to use in large areas