Underground cavity volume detection method and underground cavity volume detection device

A cavity and volume technology, applied in the field of geology and detection, can solve problems such as increased detection difficulty, decreased detection accuracy, and roof damage in the burn-out area
CN102607663AActive Publication Date: 2012-07-25ENN SCI & TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ENN SCI & TECH DEV
Publication Date
2012-07-25

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Abstract

The invention belongs to the fields of geology and detection and relates to an underground cavity volume method and an underground cavity volume detection device. Particularly, the underground cavity volume detection method includes the following steps of 1) filling water into an underground cavity or keeping the underground cavity full of water; 2) adding detectable reagent of known quantity of A0mg into the underground cavity; 3) dispersing the detectable reagent in the step 2) in the water uniformly; 4) detecting concentration C' mg / L of the detectable reagent in the water; and 5) computing the volume V' of the water filled in the underground cavity according to the following formula, and obtaining the volume V of the underground: V=V'=A0 / C' / 1000m3. The invention further discloses the underground cavity volume detection device. The underground cavity volume method is capable of accurately measuring the volume of the underground cavity, particularly an empty combustion area and is short in cycle, free of risk, fine in repeatability and simple in process.
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Description

technical field

[0001] The invention belongs to the field of geology and detection, and relates to a method and a device for detecting the volume of an underground cavity. Background technique

[0002] Underground coal gasification technology is a method of direct and controlled combustion of coal buried in the ground, and generates combustible gas through the thermal and chemical effects of coal. It has good safety, low investment, high efficiency, and less pollution. Etc. After the gasification is completed, the original coal seam is exploited by gasification to form a burn-out zone.

[0003] Oil shale refers to a fine-grained sedimentary rock with high kerogen content and a considerable amount of oil that can be fractionated. The mass fraction of ash is greater than 40%, and the oil content is between 3.5% and 30%. The difference between oil shale and coal is that its ash mass fraction is greater than 40%. Oil shale must be heated to release hydrocarbon gases and liqui...

Claims

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