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A kind of measuring method of crushing expansion coefficient

A technology of crushing expansion coefficient and measurement method, which is applied in the field of safety control in the mining industry, can solve the problems of large access, large deviation, endangering the safety of mining areas, etc., and achieves the effects of simple calculation, low cost and convenient operation.

Active Publication Date: 2018-08-28
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Application Information

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Problems solved by technology

In the prior art, the coefficient of disintegration can only be calculated based on empirical formulas. However, due to the different rock compositions in different mining areas, and various objective conditions such as formation depth and water content are also different, the coefficient of dilatation calculated by the prior art Generally, there is a big discrepancy with the actual situation. When calculating the subsequent settlement, it is calculated based on the broken expansion coefficient obtained by the above method, and the deviation is larger, which will directly endanger the safety of the mining area.

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  • A kind of measuring method of crushing expansion coefficient
  • A kind of measuring method of crushing expansion coefficient
  • A kind of measuring method of crushing expansion coefficient

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Embodiment Construction

[0022] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various changes in different embodiments without departing from the scope of the present invention, and that the description and illustrations therein are illustrative in nature and not limiting. this invention.

[0023] Such as Figures 1 to 3 As shown, the method for measuring the coefficient of dilation of rock according to an embodiment of the present invention includes, measuring the volume V of the rock 10 S ; After the rock 10 is broken into a plurality of rock fragments 11, measure the total volume V of the plurality of rock fragments 11 B , through the formula: expansion coefficient k=V B / V S The coefficient of dilatation of rock 10 was calculated.

[0024] Specifically, V S , V B It can be measured by the following methods:

[0025] Such as figu...

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Abstract

The present invention provides a method for measuring rock bulking coefficient. The method includes injecting a liquid into a container, and recording a liquid level height h1; immersing a rock in the liquid container, and recording a liquid level height h2; and calculating the rock volume VS according h1 and h2 and the cross-sectional area of the container; taking the rock from the container, and breaking into a plurality of rock fragments, closely stacking the plurality of rock fragments in the emptied container, recording the height h3of the plurality of rock fragments in the container, and calculating the total volume VB of the plurality of rock fragments according to h3 and the cross-sectional and the container area; and calculating the bulking coefficient by the formula k=VB / VS. The measuring method of the bulking coefficient has the advantages of simple calculation, convenient operation, fast measurement and low cost, great implementation value and social and economic benefits.

Description

technical field [0001] The invention relates to the safety control technology of the mining industry, in particular to a method for measuring the coefficient of breaking expansion of rocks. Background technique [0002] After the mining of the ore seam, the roof rock will collapse and break, and the volume of the broken rock will be larger than that of the whole state. This property is called the broken bulk of the rock. The crushing property of rock can be expressed by the ratio of the volume of the rock in the loose state after crushing to the volume of the rock in the whole state before crushing, and this value is called the crushing coefficient. [0003] The volume of the broken rock is not easy to calculate, and the study of the breaking and compaction characteristics of the broken rock is of great significance to the analysis of mining subsidence, residual subsidence of the goaf surface, and the stability of the overlying strata in the goaf. Therefore, it is necessary...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01F17/00
CPCG01F17/00G01N33/24
Inventor 何满潮马成荣
Owner CHINA UNIV OF MINING & TECH (BEIJING)