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Method for intelligently controlling SO2 concentration of iron pyrite downhole working face

A technology of intelligent control and working face, which is applied in mine/tunnel ventilation, mining equipment, mining equipment, etc. It can solve the problems that concentration monitoring and control cannot be carried out synchronously and in real time, cannot be successfully warned in real time, and spontaneous combustion accidents occur. The monitoring and regulation is not timely, the effect is good, and the effect of accurate monitoring

Active Publication Date: 2020-09-11
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, the current working face control SO 2 The concentration method has the following defects: (1) SO 2 The monitoring and regulation of the concentration cannot be carried out simultaneously and in real time; (2) When the pyrite oxidation reaction heat release in the working face may turn into a spontaneous combustion accident, the current technology cannot successfully warn in real time, and it will lead to a spontaneous combustion accident

Method used

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  • Method for intelligently controlling SO2 concentration of iron pyrite downhole working face
  • Method for intelligently controlling SO2 concentration of iron pyrite downhole working face
  • Method for intelligently controlling SO2 concentration of iron pyrite downhole working face

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Embodiment 1

[0035]The implementation steps of this example are as follows: (1) Preparatory work for monitoring of mining face; (2) Selection and arrangement of measuring points in working face; (3) Determination of safety threshold; (4) Installation of monitoring equipment and debugging of monitoring system; (5) The implementation of real-time control of the working face; (6) After the mining of the working face is completed, the monitoring equipment is recovered; the specific operations of the above 6 steps are as follows:

[0036] (1) Preparations for monitoring of mining face

[0037] The main preparatory work includes: mastering the ventilation situation of the working face, the grade of pyrite and the spontaneous combustion of the working face, and the safety situation of the working face.

[0038] (2) Selection and arrangement of working face measuring points

[0039] According to the safety situation of the working face, the measuring point must first ensure the construction safet...

Embodiment 2

[0055] A certain pyrite mine adopts underground mining, and the mining method is upward horizontal layered filling mining method. 2 The poisoning accident and pyrite spontaneous combustion accident caused damage to the mine production. 2 The concentration is intelligently controlled using this technology. Specific steps are as follows:

[0056] (1) Preparations for monitoring of mining face

[0057] The working face to be tested is the stope of the 2# ore body of a pyrite mine. The upward horizontal layered filling mining method is adopted. The stope is arranged along the trend of the ore body, the mining layer height is 3-5m, and the maximum exposure area of ​​the stope is designed. 1000m2, the ore is high-grade pyrite, the average grade is 30%, and the sulfur grade of individual raw ore is as high as 41%; the roof of the stope is stable, the return air tunnel of the stope is stable, and the equipment can be installed safely without support. Ore with a sulfur grade of more...

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Abstract

The invention provides a method for intelligently controlling the SO2 concentration of an iron pyrite downhole working face. According to the method, an observation station is built on the downhole working face and comprises a sampling ore heap formed through accumulation of high-grade iron pyrite in the working face, and the observation station further comprises a controller, an SO2 concentrationsensor and a temperature sensor; and the controller collects SO2 concentration data of the position of the observation station through the SO2 concentration sensor and collects temperature data of the position of the observation station through the temperature sensor, and a ventilation bureau fan and an accident alarm on the working face are controlled according to monitor data. The method is simple, efficient, safe, intelligent and reliable, the effect is good, the concentration and temperature of SO2 of the downhole working face can be automatically monitored, and the SO2 concentration canbe safely controlled.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to an intelligent control pyrite underground working face SO 2 concentration method. Background technique [0002] The main component of pyrite is FeS 2 , During the mining process, the contact area of ​​the pyrite in the working face with the air increases, and an oxidation reaction occurs to generate SO 2 . SO 2 It is a colorless and pungent odor toxic gas. The national health standard value of the People's Republic of China stipulates that when the concentration of sulfur dioxide gas in the air is greater than or equal to 2ppm, it will pose a hazard to the health of the people in it. Moreover, the oxidation reaction of pyrite is an exothermic reaction. If the released heat is not effectively dissipated, it will cause the temperature of the mining face or ore pile to rise, and the temperature rise will lead to aggravation of the reaction. Once the temperature rises to the ignit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18E21F1/00
CPCE21F17/18E21F1/006
Inventor 张文慧李兴尚胡维喜
Owner FUZHOU UNIV
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