Raw coal sample making method

A production method and technology of coal samples, applied in the field of production of coal samples used in indoor experiments, can solve the problems of sampling failure, uneven force on coal blocks, easy eccentricity, etc., and achieve the effect of increasing stability and improving production efficiency

Inactive Publication Date: 2013-02-13
HENAN POLYTECHNIC UNIV
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  • Abstract
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Problems solved by technology

Due to some original fissures / cracks in the original coal block, with this method of drilling the coal sample, the coal sample starts to break before the drilling is completed, the success rate is low, and it is difficult to achieve the ideal sampling effect
Coupled with the irregular shape of the original coal block, the force on the coal block is uneven during direct drilling, and it is also prone to eccentricity, which leads to sampling failure

Method used

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  • Raw coal sample making method

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Embodiment Construction

[0012] Depend on figure 1 The raw coal coal sample production method shown is characterized in that it includes the following steps: (1) first seal the raw coal block 1 taken back from the coal mine site with a packaging film 5, and then place it in a box body 2 of an appropriate size. The body 2 is a wooden box, and the packaging film 5 is a plastic film. It should be ensured that there are no air bubbles in the packaging film 5, and then the fine aggregate concrete 3 is poured to make the concrete 3 fill all the gaps between the packaging film 5 and the box body 2, so that , the concrete 3 is densely wrapped on the top, bottom and circumference of the packaging film 5, and the original coal block 1 is wrapped in the packaging film 5, that is, the concrete 3 fills all the gaps between the original coal block 1 and the box body 2, (2) curing After 1 to 2 days, after the concrete 3 is completely hardened, the box body 2 can be placed on the coring platform of the drilling sampl...

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Abstract

The invention discloses a raw coal sample making method. The raw coal sample making method comprises the following steps of: (1) firstly, placing an original coal block taken from a coal mine site in a box body, casting concrete into the box body to ensure that the concrete is full of all gaps between the original coal block and the box body; (2) after the concrete is completely hardened, sampling the coal block by using a drilling sampler; and (3) finally, grinding the drilled coal sample into a coal sample with a size required by an experiment, and placing the made original coal sample in a drying box for later use in the experiment. According to the invention, the effective raw coal sample making method is provided to increase the making success rate of the raw coal sample.

Description

technical field [0001] The invention relates to a raw coal coal sample production method, which is mainly suitable for the production of coal samples used in indoor experiments. Background technique [0002] In the process of making raw coal coal samples in the past, it is often adopted to directly take cylindrical coal samples for experiments on large intact coal blocks by using a drilling sampling machine. Because there are some original fissures / cracks in the original coal block, with this method of drilling the coal sample, the coal sample will start to break before the drilling is completed, the success rate is low, and it is difficult to achieve the ideal sampling effect. Coupled with the irregular shape of the original coal block, the force on the coal block is uneven during direct drilling, and it is also prone to eccentricity, which leads to sampling failure. Contents of the invention [0003] The purpose of the present invention is to provide an effective raw co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 王登科魏建平姚邦华刘勇夏玉玲秦恒洁张宏图
Owner HENAN POLYTECHNIC UNIV
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