Coal sample extracting device for underground drilled hole of coal mine

Abstract

The invention relates to a coal sample extracting device for an underground drilled hole of a coal mine. The coal sample extracting device for the underground drilled hole of the coal mine comprises a coal feeding barrel, a coal feeding clamping groove and a coal storing barrel. The coal feeding clamping groove, the coal feeding barrel and the coal storing barrel are sequentially connected in a threaded mode and communicate with one another; rotary vane cutter teeth are arranged on the section of the coal inlet end of the coal feeding barrel in the circumferential direction; an elastic blocking device capable of enabling an inner cavity of the coal feeding clamping groove to be switched between opening and closing is installed in the coal feeding clamping groove; and the coal storing barrel is connected with a drill rod in a threaded mode. The overall coal sample extracting device for the underground drilled hole of the coal mine is simple in structure and is divided into three parts, and disassembling and assembling are convenient so that a coal sample can be taken out; cost is low, requirements of extracting of the coal samples from various drilled holes in underground soft coal bodies or hard coal bodies are met, and meanwhile, most of the extracted coal samples are in a blocky shape for convenient rejecting of gangue parts, and the purity of the coal samples is guaranteed; and especially, a mine party can conduct processing according to the sizes of the drilled holes and the required amount of the coal samples.

Description

technical field [0001] The invention relates to the field of mining, in particular to an extraction device for coal samples from boreholes in coal mines. Background technique [0002] Coal is an important basic energy source in my country. Since the "Twelfth Five-Year Plan", it has become normal to accelerate the green development and clean utilization of coal. However, for the current severe situation of coal mines, cost reduction and efficiency increase are the top priorities in the work . From 2012 to the present, although the accident rate in the coal mining process has decreased, the occurrence of any kind of accident should not be underestimated, and it will cast a layer of frost on the current dismal coal mining enterprises. The hazards of gas outburst accidents are the most serious. Doing a good job in the prevention and control of coal and gas outburst is a key step, and the effectiveness of outburst prevention and control depends on the accuracy of coal and gas ou...

AI Technical Summary

Problems solved by technology

Since the sampling space is the space between the casing and the drill pipe, the amount of coal samples to be taken is greatly limited. In addition, when the coal samples are taken from the downward hole, there is no auxiliary device at the lower end of the sampling space to prevent the coal samples from falling. During the drilling process, the coal sample is easy to drop, and at the same time, it is limited to coal dust, and the biggest shortcoming of coal dust is that it is difficult to remove the gangue particles.

There are also sampling devices with complex principles, which increases the unreliability of the device. Once a problem occurs in a certain part during use, the sampling will fail.

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