Method for measuring average wind velocity of tunnel by single point statistics

Abstract

The invention provides a method for measuring the average wind velocity of a tunnel by single point statistics. The method comprises the following steps: determining sampling point positions and the number of sampling points of a to-be-measured tunnel section; determining the number of sampling of the sampling point wind velocity by setting the sampling point wind velocity sampling standard error confidence level and time-average error according to the statistic principle; arranging a wind velocity sensor in each sampling point, collecting the instant wind velocity of each wind velocity sensor, and determining the time-average wind velocity in the sampling point; determining the average wind velocity of a tunnel section according to a statistic measurement mathematic model of the tunnel average wind velocity; selecting an arbitrary point in the to-be-measured section as a single measurement point position, assembling a wind velocity sensor in the single measurement point position, and determining the wind velocity conversion coefficient of the single measurement point position; and collecting the instant wind velocity of the single measurement point position in real time, and determining the current time-average wind velocity of the single measurement point position to determine the current average wind velocity of the tunnel section. The method maintains the accuracy of a multi-point wind measurement method and has the advantages of simpleness, convenience and high efficiency of a single point method.

Description

technical field [0001] The invention belongs to the technical field of mine ventilation in mining engineering, and in particular relates to a single-point statistical measurement method for the average wind speed of a roadway. Background technique [0002] Mine ventilation is the basic measure to ensure safe production in mines. Many major accidents in the coal mine field have been caused by poor ventilation management and poor ventilation conditions. In mine ventilation, the average roadway wind speed is the most important basic parameter. The measurement accuracy and efficiency of the roadway average wind speed directly determine the level of mine ventilation technology management. Therefore, it is of great practical significance and application to study efficient and accurate roadway average wind speed measurement methods value. [0003] At present, the measurement methods of roadway average wind speed can be mainly divided into two types: single-point method and multi-p...

AI Technical Summary

Problems solved by technology

However, the wind speed sensor can only monitor the wind speed at one point, and the wind speed distribution at each point on the roadway section is uneven. Therefore, according to the current measurement method, there is a large error in using the wind speed value measured by the wind speed sensor as the average wind speed of the section.

In addition, because the air flow in the roadway is usually in a turbulent state, affected by turbulent flow fluctuations, the monitoring value of the wind speed sensor is always in a fluctuating state, showing the phenomenon of "inaccurate measurement", which further increases the error of single-point wind measurement. For this, No reasonable solution has been proposed in previous measurement methods

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