Method and system for determining air leakage amount of coal mine airtight wall

Abstract

The invention provides a method for determining the air leakage amount of a coal mine airtight wall. The method comprises the steps that 1, the gas concentration of the windward side and the leeward side of the airtight wall, the air amount outside the airtight wall and the gas concentration inside the airtight wall are detected; 2, the gas emission amount of the airtight wall is calculated according to the gas concentration of the windward side and the leeward side and the air volume outside the airtight wall; and 3, the air leakage amount of the airtight wall is calculated according to the gas emission amount and the gas concentration inside the airtight wall. The air leakage amount of the airtight wall can be obtained through calculation of the method, and the airtight quality, the air inlet and outlet conditions, the gas emission conditions and the like of the airtight wall can be reflected more truly. Therefore, the mine can timely take leaking stoppage measures on the airtight wall with poor sealing effect, local ventilation system adjustment is carried out on the airtight wall with excessively concentrated local air pressure of the ventilation system, and the pressure of the airtight area is equalized; gas accumulation and spontaneous ignition accidents caused by airtight air leakage are avoided; and the method is simple in calculation, reliable in data and capable of judging the air leakage condition of the airtight wall at any time.

Description

technical field [0001] The invention relates to the technical field of coal mine shaft engineering, in particular to a method and a system for determining the air leakage volume of a closed wall of a coal mine. Background technique [0002] For underground blind alleys, old empty alleys, and abandoned alleys, airtight walls should be set up according to relevant regulations to prevent gas leakage and isolate disaster areas. There are strict requirements on the materials and strength of airtight walls for masonry. Blast resistance and tightness of airtight walls. [0003] At present, most coal mines use the "water column meter observation method" to observe the wind in and out of the airtight wall. When the construction quality of the airtight wall is poor and the airtight effect is not good, the readings of the water column meter will be distorted. It affects the inspection and judgment of the old tunnel inspectors and tile inspectors on the gas gushing out of the closed wa...

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