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Coal mine dust control method based on dust concentration

A dust concentration, coal mine technology, applied in the field of coal mine dust control based on dust concentration, can solve the problems of rising dust concentration, unfavorable personal safety of workers, long time, etc., and achieve the effect of improving reliability, ensuring personal safety and improving accuracy

Active Publication Date: 2019-08-16
CHINA COAL TECH ENG GRP CHONGQING RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the fixed lower limit value of the existing dust concentration in the prior art, causing the dust concentration to be controlled at the lower limit value of the dust concentration by the spray device in the case of high-concentration dust, and the spray device is immediately closed, and the dust The concentration rises fast, which makes the dust concentration in the environment stay above the safe value of the concentration for a longer time, which is not conducive to the personal safety of workers. A coal mine dust control method based on dust concentration is provided. By changing the dust concentration in the spray device, the lower The limit value enables the spray device to adapt to different dust source concentrations, flexibly changes the time of spray dust reduction, and keeps the dust concentration in the environment at a low concentration for a long time

Method used

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  • Coal mine dust control method based on dust concentration

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Effect test

Embodiment 1

[0023] A coal mine dust control method based on dust concentration. Coal mine spray devices are equipped with upper and lower limits of dust concentration. When the dust concentration is detected to be greater than the upper limit, the nozzle is turned on. When the limit value is reached, the nozzle is closed, and the lower limit value of the dust concentration is controlled by the main control unit, so that the lower limit value of the dust concentration is inversely proportional to the time of continuous spraying.

[0024] In this embodiment, the upper limit value of the dust concentration is set to B, and the nozzle control conditions are as follows:

[0025] a. Turn on the nozzle, and when the collected dust concentration is greater than the upper limit value B of the dust concentration, turn on the nozzle.

[0026] b. Close the nozzle, set the lower limit value of the dust concentration to B(1-H), H is the hysteresis ratio of the dust concentration; H=(10+t 开 / 20) / 100,t ...

Embodiment 2

[0034] like figure 1 As shown, in coal mines in the medium range, two sets of devices are needed to meet the requirements of dust reduction. The main control unit 1 is connected with two dust concentration sensors 2, two nozzles 3, two control valves 4 and two Pyroelectric sensor 5, that is, two sets of devices are used for spray dust reduction treatment, and each set of devices adopts the method in Embodiment 1 to flexibly change the hysteresis ratio, and then change the time of spray dust reduction; set two pyroelectric sensors The distance between the sensors 5 is L. When a worker passes by, the pyroelectric sensor 5 receives the heat signal of the worker, and transmits the signal to the main control unit 1, and the main control unit 1 closes the pyroelectric sensor 5 that has collected the heat signal. position of the control valve 4, the closing time of the control valve 4 is (10L / 4)s, and then the control valve 4 returns to its original state, so that workers can pass th...

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Abstract

The invention relates to the technical field of coal mine dust control, in particular to a coal mine dust control method based on dust concentration. An upper limit value and a lower limit value of the dust concentration are arranged in a coal mine spraying device, the lower limit value of the dust concentration is controlled by using a main control unit, thus the lower limit value of the dust concentration is inversely proportional to the continuous spraying time, through the arrangement that the lower limit value of the dust concentration is inversely proportional to the continuous sprayingtime, thus when the dust concentration is high, the lower limit value of the dust concentration is reduced due to the prolongation of the spraying time, the dust concentration can be fully lowered, the dust concentration in the environment can be kept at low concentration for a long time, personal safety of workers is ensured, the incidence of the workers is lowered, thus the spraying device can adapt to different concentrations of dust sources, the amount of spraying is changed according to the concentration of the dust sources, water resources are utilized reasonably, and environmental protection is advantageously achieved.

Description

technical field [0001] The invention relates to the technical field of coal mine dust prevention and control, in particular to a coal mine dust control method based on dust concentration. Background technique [0002] Coal mine dust is the main occupational hazard factor in coal mines and the root cause of pneumoconiosis. The state has treated coal mine dust hazards and coal mine safety accidents at the same level. There is a large amount of dust in the coal mine mining face, air return lane and transportation lane, and spray dust suppression is one of the main methods of dust control in this area. However, due to the limitation of underground water supply and drainage in most coal mines, it is impossible to achieve large-area, large-quantity, all-weather spray dust reduction. [0003] At present, the water supply standard set according to the requirements of the coal mine safety regulations is almost not able to meet the needs of all-weather, large-scale water supply to m...

Claims

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Application Information

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IPC IPC(8): E21F5/04
CPCE21F5/04
Inventor 张强胥奎李德文吴付祥李征真隋金君邓勤晏丹颜鸽来刘海辰程丽焦敏惠立锋罗小博郑磊
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST
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