Core separation box for coal mine downhole waterpower reverse circulation continuous coring and method thereof

Abstract

The invention relates to a core separation box for coal mine downhole waterpower reverse circulation continuous coring and a method thereof. The core separation box comprises a core cabinet, a core barrel, a slip joint, a joint cabinet, a negative pressure extraction box, a slag sediment box and a core informing mechanism. The core barrel is connected into the core cabinet in an inserting mode. The core cabinet is arranged inside the negative pressure extraction box at a certain angle, after the core cabinet is connected with a core return channel of a coal mine downhole reverse circulation coring drill, an upward returning mine core enters the core barrel through the slip joint, the mine core impacts a core informing mechanism transfer bar, the informing mechanism swings to transfer information, coal rock fragments and flushing fluid enter the slag sediment box through annular through holes distributed in the core barrel, and pressure relief gas overflowing out of the core return channel can enter a gas negative pressure extraction pipeline through the negative pressure extraction box. Therefore, the core separation box for coal mine downhole waterpower reverse circulation continuous coring and the method thereof integrate with mine core upward return informing, coal core collecting, gas extraction and settled slag collecting, the structure is simple, assembling is convenient,operation is easy and underground coal mine safety construction is guaranteed.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a core separation box for hydraulic reverse circulation continuous coring in coal mines and a method thereof. Background technique [0002] Underground geological anomalies in coal mines are a major safety hazard in coal mine production safety. With the gradual implementation of refined management models in coal mines, in order to avoid unplanned exposure of geological structures, the work of identifying geological structures in coal mining faces, especially geological anomalies, etc. Higher requirements for precise detection of structural elements are put forward, and only pre-identification can ensure safe production. At present, drilling is the most intuitive, effective and accurate technical method, which can be divided into two exploration methods: coreless drilling and core drilling. Tunnel coring drilling is mainly based on horizontal drilling, and there are th...

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Problems solved by technology

[0004] At present, there is no supporting coal core separation box in the underground of the coal mine. Basically, the coal core and broken coal cuttings are discharged directly into the designated box through the rubber hose, and the pressure relief gas escaped from the reverse circulation channel is not collected. , there is a certain security risk

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