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Pore wall gas flow measuring device and pore wall gas flow measuring method

A flow measurement device and gas technology, applied in the direction of volume flow measurement device, measurement device, liquid/fluid solid measurement, etc., to achieve the effect of avoiding low index outstanding accidents and improving accuracy

Inactive Publication Date: 2015-04-01
HENAN POLYTECHNIC UNIV
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Problems solved by technology

However, in the field measurement, only the total amount of gas gushing out of the borehole can be collected from the orifice. To obtain the initial gas flow rate near the drill bit, the subsequent gas flow rate of the hole wall and coal chips outside the drill bit must be calculated. Deducted from the total amount of gas

Method used

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  • Pore wall gas flow measuring device and pore wall gas flow measuring method
  • Pore wall gas flow measuring device and pore wall gas flow measuring method
  • Pore wall gas flow measuring device and pore wall gas flow measuring method

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Embodiment

[0041] Example: see figure 1 —— Figure 13 .

[0042] A hole wall gas flow measurement device, including a coal seam simulation device I, figure 1 , figure 2 The structure of the coal seam simulation device is shown, and a drilling rig and a drill pipe are used to drill holes in the simulated coal seam 8 in the coal seam simulation device I; a gas tank II and a coal sample tank III are also included, and the coal seam simulation device I is provided with Inflatable port 9 and gas outlet 11, the coal sample tank III is provided with an air inlet 28, and the gas tank II is inflated to the coal seam simulation device I through the gas charging port 9, and the gas outlet 11 of the coal seam simulation device I is closed by a high-pressure rubber hose 31. It communicates with the air inlet 28 of the coal sample tank, and the top of the coal sample tank III is provided with a spout 14 with a valve, and the coal sample tank III is connected with a flow collection system.

[00...

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Abstract

The invention relates to the technical field of coal mine safety monitoring, in particular to a pore wall gas flow measuring device and a pore wall gas flow measuring method based on the device. The pore wall gas flow measuring device comprises a coal seam simulating device, a gas tank and coal sample tank. A drill rod drills simulated coal seams in the coal seam simulating device. The gas tank, the coal seam simulating device and the coal sample tank are communicated sequentially. A nozzle with a valve is arranged at the top of the coal sample tank connected with a flow collecting system. The measuring method using total gas flow acquired by simulated experiments to minus gas flow rushed out of 'dead space' in a plug and the coal sample tank and gas flow rushed out from residual coal dust in the plug to obtain pore wall gas glow, a dynamic pore wall gas flow rushing rule curve is obtained by analyzing experiment data, and the method is quite significant in coal seam comprehensive treatment.

Description

technical field [0001] The invention relates to the technical field of coal mine safety monitoring, in particular to a hole wall gas flow measurement device and a hole wall gas flow measurement method based on the measurement device. Background technique [0002] The outburst dynamic prediction method of coal roadway—continuous flow method believes that the initial gas flow rate of the hole wall and coal chips near the drill bit during the drilling process can reflect the outburst risk of the coal roadway excavation face. However, in the field measurement, only the total amount of gas gushing out of the borehole can be collected from the orifice. To obtain the initial gas flow rate near the drill bit, the subsequent gas flow rate of the hole wall and coal chips outside the drill bit must be calculated. Deducted from the total amount of gas. For this reason, the present invention aims to design a kind of hole wall gas flow measurement device based on sensor and computer data...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F7/00
Inventor 韩颖张飞燕倪小明孟薇程虹铭宋德尚朱林剑王博杨志龙曹文涛任艳普周玉军
Owner HENAN POLYTECHNIC UNIV
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