Temperature-sensitive materials, preparation methods and applications for predicting coal spontaneous combustion in gobs

Abstract

The invention discloses a temperature-sensitive material for predicting coal spontaneous combustion of goaf and preparation method and application of the temperature-sensitive material. The temperature-sensitive material is composed of a capsule containing tracer core materials, the capsule wall of the capsule is prepared from prepared raw materials obtained by evenly mixing 70 type chlorinated paraffins and 52 type chlorinated paraffins at the ratio of 3:1 to 6:1, and the tracer core materials include SF6 and industrial flavor. The temperature-sensitive material can be directly used in a goafarea, first-phase arrangement is not required, and simplicity, convenience and practicality are achieved; the chlorinated paraffins of the capsule wall have good stability and can protect a capsule core material to remain in the goaf for a long time at room temperature, the tracer core materials are easy to prepared and obtain, when residual coal in the goaf appears high-temperature hidden dangerand the ambient temperature reaches or exceeds a critical value of capsule wall softening of the capsule, thawing and rupture of the capsule wall can be detected by the human body olfaction and an SF6 detector, thus the phenomenon of coal spontaneous combustion can be predicted stably and effectively, and major accidents caused by coal spontaneous combustion are avoided; and a metal frame can prevent damage from geological problems, and the error-tolerant rate of a system is increased.

Description

technical field [0001] The invention relates to a temperature-sensitive material, in particular to a temperature-sensitive material for predicting coal spontaneous combustion in a goaf, a preparation method and an application thereof, and is applied to the transfer of internal parts of a factory building. Background technique [0002] Coal spontaneous combustion is one of the main natural disasters that threaten the safety of coal mining. According to statistics, about 80% of the coal seams that have been mined in my country have a high tendency of spontaneous combustion; mines that exploit thick coal seams basically have the problem of coal spontaneous combustion, and the average number of closed working faces is as high as more than 100 each year; in addition to damaging coal resources, Toxic and harmful gases produced by spontaneous combustion of coal pose a serious threat to the physical and mental health of personnel; under some special conditions, it may even induce maj...

AI Technical Summary

Problems solved by technology

[0004] The existing coal spontaneous combustion prediction and prediction methods mainly have the following problems: ① due to the need to arrange sensors and long lines in the goaf in advance, management is difficult, and the equipment is easily damaged during the advancing process of the working face, resulting in property losses, and Difficult to rearrange once broken

②Due to the long line of bundle tube arrangement, a protective casing needs to be added, which is costly, and it is difficult to ensure that there is no gas leakage during the extraction process for the long line of gas extraction, and it is difficult to ensure that the extracted gas is goaf gas. Monitoring The prediction accuracy is not high

③Due to management problems, the existing monitoring and forecasting technology needs to be analyzed on the ground, and then contacted with the underground process, it is difficult to ensure that personnel are always in place in time

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