CN103163784A

CN103163784A - Coal mine underground blasting simulation system based on programmable logic controller (PLC)

Info

Publication number: CN103163784A
Application number: CN2011104624693A
Authority: CN
Inventors: 刘海宽; 陈传虎; 邹德旋; 李旭超; 秦海鹏
Original assignee: Xuzhou Normal University
Current assignee: Xuzhou Normal University
Priority date: 2011-12-19
Filing date: 2011-12-19
Publication date: 2013-06-19

Abstract

The invention relates to a coal mine underground blasting simulation system based on a programmable logic controller (PLC). The system is an optimal blasting scheme, based on the PLC, which can simulate a coal mine underground blasting working environment, and is decided according to the simulation environment, and meanwhile the simulation system can also be used for training of employed persons. With the PLC as a core, the system is composed of a shot hole detection circuit, an electric detonator direction detection circuit, a stemming detection circuit, the PLC, a PLC extended module and an MCGS module. In the system, on one hand, a lower computer PLC enables all types of data collected by the circuits to be transmitted to the MCGS module in an on-line mode, and the MCGS module simulates the blasting environment and provides evidence to the blasting scheme. On the other hand, an upper computer enables a blasting control order and a calling order to be transmitted to the lower computer through the MCGS module, so that blasting operation can be conducted, and therefore the purpose that the optimal blasting scheme is decided in the simulation system is achieved.

Description

Based on PLC coal mine underground explosion analogue system

Technical field

The present invention relates to a kind of coal mine underground explosion analogue system, particularly adopt the coal mine underground explosion analogue system of programmable logic controller (PLC) (PLC)

Background technology

The colliery blasting technology is through one of core technology of [underground and coal production overall process, implements all kinds of blasting engineerings in the complex environment in mine, and its construction difficulty is large, dangerous high, is directly connected to safety and the production efficiency of coal production.In the explosion production run, whether the blasting parameter design rationally is the principal element that determines demolition effect quality and explosion production cost height.How to improve the scientific level of downhole coal mine explosion design, guarantee the security of explosion design, effect and cost for controlled blasting is produced improve the coal production economic benefit, all have the significance of can not ignore.But due to aspects such as the complicacy of influence factor in blasting process and explosion designing technique developing histories, the coal mine underground explosion engineering design is mainly also outward to rely on blasting technique personnel individual's experience to be formulated at present.Blasting technique generally only depend on individual on-site experience and professional knowledge level the degree of enriching and other factor and individual subjective factor, blasting technique personnel's self diathesis has determined the effect of explosion like this.

Summary of the invention

In order to address the above problem, to design a cover based on PLC and can replace working environment analogue system under coal mine, the environment that goes out according to this system emulation parameter plan of determining goes out best blasting scheme, and this analogue system can also be used for practitioner's training simultaneously.

The general structure of coal mine underground explosion analogue system as shown in Figure 1.

Its fundamental design idea is: blasting engineering is a systems engineering, and explosion design wherein is the process that a series of blasting technique parameters are processed.Therefore, the design's content is on the basis of colliery blasting technology and computer communication technology with requiring, for various some possible conditions in the downhole coal mine explosion, as the detection of borehole, the detection of stemming and the detection of electric detonator direction, exploitation colliery blasting analogue system, and can correctly show on computers, finally form complete explosion analogue system.Design procedure is as follows:

(1) carry out as requested the design of borehole arrangenent diagram.

(2) specify big gun hole arrangement basic orientation with mouse;

(3) design of big gun hole site;

(4) detection of big gun hole firing order and detonator direction;

(5) detection of hole charge:

(6) design parameter;

(7) selection of PLC and MCGS

(8) communication connection of PLC and MCGS

One of colliery blasting analogue system has following functions:

(1) can make correct reaction to operation;

(2) can find out the cardinal principle flow process of operation on Simulation Interface;

(3) preservation of individual system can be arranged to trainee's achievement;

(4) can roughly simulation be arranged to the operating environment of explosion and flow process.

Description of drawings

Fig. 1 is the analogue system overall construction drawing.

Fig. 2 is the test section system diagram.

Fig. 3 is the PLC wiring diagram.

Fig. 4 is photoswitch circuit figure.

Fig. 5 is the infrared tube circuit diagram.

Embodiment

Native system is that the mode take PLC as core realizes.In this system, on the one hand, the data collection station of slave computer must accurately, reliably, promptly be delivered to the various online datas that collect up-computer control center; The control command of host computer and traffic order must be issued to each slave computer like clockwork on the other hand, and the key of completing this two aspects function is data communication.In general monitoring equipment and control center at a distance of nearer, can directly carry out data communication by RS232 interface or RS422 interface; When their apart from each others, can additionally arrange the special-purpose communication information, adopt asynchronous MODEM special line transmission mode to carry out data communication.The problem that computer communication system take PLC as core need to be considered is mainly establishment of signal procedure under choosing of hardware configuration, communication protocol and realization, specific operation system etc.

The test section partly is comprised of host computer, PLC, 4 infrared tubes, optoelectronic switch, sensor as shown in Figure 2.The configuration software of host computer (MCGS) communicates with PLC by the mode (RS 232/RS 485) of serial ports synchronous communication, and the state of all storeies, controller and the I/O interface of monitoring, form with variate-value is transferred on computing machine, for host computer with process.PLC is main settling signal real-time sampling, pulsed quantity accumulative total, precaution alarm input and the output etc. of reporting to the police in monitoring system, and be connected by the sensor of various transmitters with the scene, as shown in Figure 3, consist of medicine hole testing circuit by the optoelectronic switch pipe in testing circuit, as shown in Figure 4, wherein 1m393 exports high-low level to the PLC input port according to light signal; Infrared light and 555 timers are consisted of the detection of detonator direction, dose and stemming testing circuit, as shown in Figure 5, the input port of the PLC that the square-wave signal of the comparator circuit programming rule that light signal consists of through 555 timers inputs to.Complete complex calculation, show various real-time graphs and preserve a large amount of historical datas and printing Chinese character form by upper.Slave computer PLC adopts ladder diagram to program, and the next PLC software is used for realizing the conversion of data acquisition, step-by-step counting conversion, the judgement of precaution alarm logic and sound and light alarm output, communication data form.Hardware configuration with install, system's AC power is used double-deck isolation, the isolation of input signal photoelectricity, improve signal noise ratio, connect up away from forceful electric power, analog signals and pulse signal adopt shielding line to transmit, and adopt the measures such as radioactivity one point earth, effectively eliminate or have weakened common mode interference and transition is disturbed.

The configuration software of host computer (MCGS) communicates with PLC by the mode (RS 232/RS 485) of serial ports synchronous communication, and the state of all storeies, controller and the I/O interface of monitoring, form with variate-value is transferred on computing machine, for host computer, processing.Finally in the mode of graph direct, the emulation purpose that the explosion environment arrives the explosion environment is described.

Claims

1. coal mine underground explosion analogue system, formed by borehole testing circuit, electric detonator direction testing circuit, stemming testing circuit, PLC and expansion module thereof and MCGS module, it is characterized in that: system realizes take PLC as core, the various detection data that slave computer PLC will collect in this system are delivered to host computer configuration software MCGS module, up-computer passes through configuration software MCGS modular simulation explosion environment according to the data that PLC transmits, for the blasting scheme decision-making provides foundation, and provide corresponding blast operations.