Monitoring point arrangement method for underground space gas explosion risk prevention and control

Abstract

The invention discloses a monitoring point arrangement method for underground space gas explosion risk prevention and control. An effective monitoring point laying strategy is constructed in combination with the total system risk value, the investment reasonability of monitoring point laying and the system risk control rate; the maximum benefit value can be obtained through optimization, fund investment can be saved, the maximum detection efficiency can be obtained, the gas pipeline leakage situation can be found in time, secondary disasters caused by gas leakage are avoided, and the method plays an important role in guaranteeing safe operation of urban gas. On the basis of a traditional risk calculation method, the sensor prediction effect is originally introduced into explosion risk calculation of the adjacent underground spaces, and all the adjacent underground spaces within the gas pipeline leakage influence range serve as a whole to calculate the total risk value of the system.

Description

technical field [0001] The invention relates to the technical field of risk prevention, control and monitoring, in particular to a method for arranging monitoring points for the risk prevention and control of gas explosions in underground spaces. Background technique [0002] With the rapid expansion of urban population and the gradual expansion of urban areas, the popularization of natural gas applications has brought about the rapid expansion of urban gas pipelines. Due to the intricate nature of the city's underground pipelines, once a gas pipeline leaks, it can easily spread to adjacent underground spaces such as rain pollution and electricity and cause a large-scale explosion. [0003] At present, there are two methods of leak detection and monitoring of urban gas pipelines: SCADA monitoring system and manual regular inspection. The SCADA system monitors the pressure and flow of each node in real time, but it can only effectively monitor the sudden drop in pressure cau...

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Problems solved by technology

[0007] After retrieval, the Chinese patent publication number is CN109443526A, a noise automatic monitoring equipment point layout method based on noise map, the patent is mainly determined according to the city scale and road density The number of monitoring points, and then allocate the number of measuring points according to the total length of the road type, and then determine the road to be monitored by calculating the equivalent sound level and road length in the noise map, and finally arrange the specific location of the monitoring points according to the relevant method; The monitoring point layout process requires the layout of various types of roads and other factors, which is a relatively fixed method of measuring point layout, and the patent does not propose the content of optimizing the measuring point and predicting the effect of the monitoring point

[0008] After retrieval, the Chinese Patent Publication No. CN103713097A is a method for laying out points for the investigation of heavy metal pollution in sediments of large-scale water bodies. In this patent, the point layout is divided into two In the first stage, investigative monitoring is carried out, and key rivers are arranged with thick lines; in the second stage, key monitoring is carried out, and dense point layout is carried out; especially in the second stage, it is based on the investigation results of the first stage and in accordance with relevant standards. Evaluate the degree of sediment pollution by heavy metals, and then use the dichotomy method to encrypt and arrange points between different points after classification; this patent has designed a corresponding point distribution strategy for the monitoring object, and this point distribution strategy is also difficult to apply to this site. The research object of the invention, and there is no process of optimizing the measuring points in this patent

[0009] After retrieval, the Chinese patent publication number is CN107451695A, a mine carbon monoxide sensor without blind area optimization layout method, which proposes a method that takes into account the defects of existing monitoring methods The CO sensor layout method for carbon monoxide high-risk points and monitoring coverage without blind areas uses graph theory and set coverage theory to establish a comprehensive optimal layout model. In order to use a heuristic optimization algorithm to solve the problem, the objective function and constraints are defined; the sensor in this patent In the roadway where the layout position is a mine, it is different from the research object of the present invention, and the monitoring effect of the sensor is not considered in this patent; in addition, the calculation result of the ant colony algorithm in this patent is not unique, therefore, the The patented solution may not be the optimal solution

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