RO133432A0 - Performance system for preventive evaluation of safety parameters in coal mines - Google Patents

Abstract

The invention relates to a system for preventive evaluation of safety parameters in coal extraction mines. According to the invention, the system comprises means for processing the data from the transducers mounted underground, at the level of the detection heads (3), the data concerning the gas structure of the mine air sucked by means of a fan (2) and a handling fan (4), these data being then transmitted via a transmission network (5) to an automated collecting and processing central station and to the remote-measuring central station located at the ground surface, and further to some personal computers for data processing.

Description

DESCRIPTION OF THE INVENTION

The invention relates to a system of preventive evaluation of the security parameters, based on the remote control of the underground atmosphere in the coal mines.

Currently, in the case of coal mines, especially the coal mines in the Jiu Valley, the exploitation activity is permanently monitored, permanently proceeding to the assessment of the gas concentrations, in particular the methane (CH4), as well as the temperature of the underground air, these must conform to the admissible prescriptions imposed by the existing security technical norms, as specific requirements for the optimal underground working environment.

The intermittent or continuous control of the security parameters is carried out with the help of portable detectors, automatic devices and installations for continuous or intermittent measurement, with alarms and interruptions in case of need of electricity when the preset concentration is exceeded.

To achieve this goal, each job, active or inactive (mining works or temporary shutdowns), is provided with measuring devices (detection heads), consisting of transducers for gas detection (methane, carbon monoxide, carbon dioxide ), determining the speed of the air, the temperature, etc., as well as with an encoder for encoding and transmitting information to the telegrizummetric power stations located in the mines.

The monitoring of gas concentrations and temperature is partially and with difficulty, the existing equipment not allowing the location of the measuring devices in hard-to-reach areas. Also, the current parameter measurement system gives an image of danger when reaching a certain alarm threshold, when it is necessary to switch off the electricity and to completely stop the activity, without a prior warning of the risk and the possibility of rapid intervention for prevention.

The problem solved by the invention consists in the realization of a system of automatic sampling and processing of the security parameters in the underground atmosphere of the oil mines, in the sense of receiving information through sensors (translators) and them, by means of a telemechanical system provided, to a telemetering station equipped with the computer mode and then to the personal processing computers.

From the multitude of different types and categories of underground works that can be subjected to monitoring from the point of view of the security parameters (abattoirs, underwater dams, dams dams, isolation dams), in figure 1 is shown schematically the way of positioning the sensors. gas and temperature behind the isolation dams during the endogenous mine fire fighting period.

Structurally, the system for monitoring gas and temperature parameters consists of: the sensor system / translator system (methane, oxygen, temperature, air velocity, monoxide and carbon dioxide); telemechanics for transmitting information (the teletransmission coder for data from captors); the telemetering unit with the computer module; processing computer / processing terminal.

From a hierarchical point of view, the monitoring system, as a whole, is made pyramidal, through 4 levels, namely (figure 2): level 0, is highlighted by translatorization, as primordial elements for measuring the parameters in the mining climate; level 1, represents the multiplexing of the signals for teletransmission; level 2 represents level monitoring

to 2018 00992

11/29/2018 2θ 'of mine; level 3, represents the general monitoring at the mining company / company level. General monitoring is done through a computer network. The connection between the computers from the mining units and the computer from the company / mining company / energy complex is made by radio waves.

ape $ 152 mm

Fig 1 Schematic of the location of the sensors for measuring the gases and the temperature during the fire fighting period behind the isolation dams: 1 - temperature sensors; 2 vacuum pump or fan in suction mode; 3 - sealed enclosure for mounting the detection heads provided with translators; 4 - maneuver valves; 5 - The data transmission network at the central processing station (dispatcher) below gives an example of embodiment of the invention in connection with figure 1, which represents the schematic location of the sensors for measuring gases and temperature.

The monitoring system of the security parameters thus designed, allows the retrieval of information from the sensors / translators mounted underground at the level of the detection heads (3), regarding the structure of the gases from the mined air aspirated by means of the fan (2) and the maneuver valve. (4). Next, the data / information on the content and structural characterization of the mine gases will be transmitted through the transmission network (5) to an automatic capture / processing plant / plant, respectively to the telemetering plant disposed on the surface of the mine.

At the level of the mentioned mining works, in order to monitor and preventively evaluate the parameters of safety and health at work, several variants can be applied, of which, in the case of the present invention, the variant involving the use of a power plant is proposed.

to 2018 00992

11/29/2018 Automated telegraphicimeters mounted on the surface of the mine, whose function is to collect, centralize and record the information provided by the system of sensors (translators). The computer module within the control panel allows the recording of information and its transmission to a higher computer level. In this embodiment, the process computer processes the collected data at a higher level, so that, through their interpretation through the program, the necessary measures can be taken to prevent self-ignition.

The transducer system is composed of transducers specially built to work with the automated telegrizummetric telemetering center.

CENTRAL CENTRAL ...__ M1NE..1 '· Ml NA. ,2

CONCENTRATOR '(CONCENTRATOR

TRADUCTORIZARE

CONCENTRATOR --j CONCENTRATOR |

Fig.2. Diagram of the hierarchical structure of the monitoring system

From a constructive point of view, the basic equipment of the telemetering unit involves a part of it disposed on the surface, such as a central cabinet that represents the "brain" of the installation and which is located outside the hazardous area, providing the voltages and currents necessary for the general operation and a enclosure with safety barriers, whose role is to ensure the intrinsic protection of circuits installed in the potentially explosive environment. The underground equipment part consists of telemetering cables with two-wire lines, composed of even numbers, equal to the number of measuring points in operation, as well as of the measuring sensors of the installation mounted in the supervised spaces.

All the components of the telemetering system planned to be mounted underground are of intrinsic construction, belonging to the current generation manufactured by the company OLDHAM, considering that at the mines within the CEH, the telegrizummetry installations still in operation are manufactured by this company.

to 2018 00992

11/29/2018

Claims (1)

PERFORMING SYSTEM FOR PREVENTIVE EVALUATION OF SAFETY PARAMETERS IN COAL MINE CLAIM The efficient system of preventive evaluation of the security parameters of the underground atmosphere of the mine consists of receiving information through sensors / translators from the composition of the detection heads (3) and transmitting them, by telematic system (5), to a telemetering unit with the module surface mounted computer and then on personal processing computers.