Distributed type coal mine gas pressure measuring system

Abstract

The invention relates to a distributed type coal mine gas pressure measuring system. The distributed type coal mine gas pressure measuring system comprises a pressure measuring pipe, a drill rod, an air pipe and a first water pipe, a double-shaft device is arranged on the drill rod, a screw rod is arranged on the drill rod, a drill bit fixedly connected with the screw rod is arranged at one end of the drill rod, the drill rod is connected with the pressure measuring pipe and the air pipe through the double-shaft device, the first water pipe is arranged in the drill rod, and rubber water bags communicating with the first water pipe are arranged on the drill rod. According to the distributed type coal mine gas pressure measuring system, the pressure measuring pipe is arranged in the screw rod, so that the phenomenon that the pressure measuring pipe is blocked due to falling of a coal seam during drilling is avoided; and meanwhile, the screw rod rotates along with the drill rod to output falling coal briquettes outwards, then the coal briquettes are blown out of a drill hole through an air nozzle, the plurality of rubber water bags are filled with water, so that the size is increased, the friction force between the water bags and the drill hole is increased, water is injected among the water bags for water sealing, the repeated utilization rate of equipment is increased, and the cost is reduced.

Description

Technical field [0001] The present invention belongs to the technical field of coal mine equipment, in particular, to a distributed coal mine gas pressure measurement system. Background technique [0002] Gas pressure in coal seam under coal mine is one of the most important indicators of gas foundation parameters, directly related to the gas governance program. During the unveiling of well alley, accurately determine that gas pressure is more secure, efficient, rapidly reveals the key. The current gas pressure sensitizer is mostly used to measure the pressure tube, grouting tube and retaining plate in the drilling of the coal seam. The cement mortar is injected into the inside in the bore, and the drilling is usually further blocked after the pressure is measured, so that the relevant equipment is blocked in the drilling, so that the usage rate of the shifting device is lowered, increasing cost. Inventive content [0003] It is an object of the present invention to solve the ma...

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Problems solved by technology

In the process of mining coal in shafts, accurate measurement of gas pressure is the key to safe, efficient and rapid coal removal. Most of the current gas pressure measuring devices use piezometric tubes, grouting tubes and baffle plates in the boreholes of the coal seams to be tested. Cement mortar is injected into the borehole through the grouting pipe. After the pressure is measured, the borehole is usually further blocked, so that the relevant equipment is blocked in the borehole, which reduces the utilization rate of the pressure measuring equipment and increases the cost.

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