Study on Comprehensive Gas Control Technology of High-Gas Fully Mechanized Caving Face

2012 ◽  
Vol 610-613 ◽  
pp. 655-660
Author(s):  
Weimin Cheng ◽  
Hai Yang Wang ◽  
Lu Lu Sun
Keyword(s):  
Control System ◽  
High Efficiency ◽  
Control Technology ◽  
Actual Situation ◽  
Gas Drainage ◽  
The Face ◽  
Gas Control

In order to comprehensively control the gas of 1151(3) fully mechanized caving face in Xieqiao coalmine scientificly and efficiently, combining the actual situation of the face, gas drainage technologies such as roof drilling, drilling along seam, gas drainage in upper corner, roof drainage roadway had been applied and a comprehensive gas control system was formed gradually. Gas problems of the face have been solved completely and safety and high efficiency of the workface has been ensured.

Gas Control Technology of Fully Mechanized Caving Face of Hard Desorbing Coal Seam

2013 ◽  
Vol 718-720 ◽  
pp. 1335-1340
Author(s):  
Gang Wang ◽  
Hai Yang Wang ◽  
Xin Hua Zhang
Keyword(s):  
Coal Seam ◽  
Efficient Production ◽  
Control Technology ◽  
Actual Situation ◽  
Coal Face ◽  
Gas Emission ◽  
Investment Cost ◽  
Residual Gas ◽  
Gas Control ◽  
Residual Coal

Basing on the problems of residual coal in goaf in fully mechanized caving face in hard desorbing coal seam, high content of residual gas, large gas emission, serious gas overrun in return airflow corner and vitiated air, combing the actual situation in 3-219 fully mechanized caving face, the paper has adopted adjacent goaf drainage, drainage in gas drainage technology, formed a low investment cost and effective gas control technology and ensured the safe and efficient production in coal face and has a certain reference to control gas of fully mechanized caving face in hard desorbing coal seam.

scholarly journals Engineering Practice of Ultra-high Pressure Hydraulic Slotting and Pressure Relief Pumping in Through Layer Hole

2021 ◽  
Vol 236 ◽  
pp. 01029
Author(s):  
Siqian Li
Keyword(s):  
High Pressure ◽  
Coal Seam ◽  
High Efficiency ◽  
Engineering Practice ◽  
Pressure Relief ◽  
Gas Drainage ◽  
Thick Coal Seam ◽  
Ultra High Pressure ◽  
Drainage Rate ◽  
Gas Control

In order to solve the problems of low gas drainage rate and long drainage time in thick coal seam with low permeability, ultra-high pressure hydraulic slotting pressure relief and permeability enhancement technology was applied in the test. The practice shows that after adopting the ultra-high pressure hydraulic slotting, the gas drainage rate is greatly improved, the time for reaching the standard of drainage is shortened, and the difficult problem of gas control in the mining face of thick coal seam is solved, which provides technical guidance for high-efficiency gas control in thick coal seam with similar conditions in mining area.

Gas Control Technology under Unstable Disturbance Stress

2015 ◽  
Vol 15 ◽  
pp. 26-34
Author(s):  
Wei Min Cheng ◽  
Lu Lu Sun ◽  
Gang Wang ◽  
Hong Yuan Qu
Keyword(s):  
Control Technology ◽  
Static Loads ◽  
Gas Drainage ◽  
Gas Concentration ◽  
Pressure Step ◽  
Working Face ◽  
Gas Control ◽  
High Level ◽  
Roadway Deformation ◽  
Surrounding Rock Deformation

Under the action of unstable disturbance stress, the stress concentration and roadway deformation are serious when tunneling along the goaf with small pillar while the adjacent working face is mining. This leads to the abnormal gas discharge and the increase of gas emission, and the effectiveness of gas drainage is reduced. In order to eliminate the threat of gas, the dynamic gas control technology of tunneling along the goaf with small pillar under unstable disturbance stress has been researched. The main sources of loads are confirmed by the analysis of dynamic and static loads. Combined with the force analysis of roadway and pillar, the stress superposition level is affected by the relative location of heading face and working face, and the regional characteristics. The measured surrounding rock deformation of A4007 return roadway heading face fits the theoretical analysis and pressure step of working face. The dynamic gas control technology is researched from the aspects of air volume, high-level gas drainage and goaf drainage, and applied in A4007 working face. The gas has been well controlled with the gas concentration of top corner of 0.62% and gas concentration of return current of 0.35%. As a result of the flow control, the gas drainage has not casused spontaneous combustion.

Research on Control System of Pitching Pose Error Elimination for Boom-Type Roadheader

2013 ◽  
Vol 419 ◽  
pp. 725-730
Author(s):  
Yi Bo Du ◽  
Xi Gao Liu ◽  
Ming Rui Hao ◽  
Zhi Min Liu ◽  
Miao Wu
Keyword(s):  
Control System ◽  
Control Method ◽  
Control Technology ◽  
Actual Situation ◽  
Kinematics Analysis ◽  
Work Requirements ◽  
Error Elimination ◽  
The Impact ◽  
Specific Control

The current roadheader automatic cutting technology has been relatively mature, the pose error elimination control technology has become a research hotspot. Pitch pose error of roadheader is too large will cause automatic excavating cut roof or floor, and will make the machine lose its stability. According to the movement way and the work requirements of roadheader, this paper put forward the control method of controlling shovel plate and back support to eliminate the impact of pitching pose error , and the corresponding sensors were selected based on the actual situation. According to the kinematics analysis of shovel plate and back support, the specific control method of the research was completed. The above system has been tested on EBZ200 type roadheader and testing results is good. The study of this system is a part of the pose error elimination control for roadheader, which will lay a foundation for the detection of roadheader pose and directional tunneling.

Developing and Research on Motion Controller Based on CPLD and MCU

2012 ◽  
Vol 490-495 ◽  
pp. 456-459
Author(s):  
Jun Han ◽  
Rui Li Chang
Keyword(s):  
Control System ◽  
High Speed ◽  
Servo Control ◽  
Numerical Control ◽  
Control Technology ◽  
Numerical Control System ◽  
Motion Controller ◽  
Research Focus ◽  
Open Cnc ◽  
Computer Numerical Control System

Open Computer Numerical Control system (Open CNC) based on PC and the Windows operating system has been a major developing direction and a research focus of the current numerical control technology. At present, there have been all kinds of the Open CNC systems with high-speed and precision servo control boards, but they are too expensive. Therefore, developing an economical and practical motion controller is great significant for middle and small numerical control system

Research and Design of Intelligent Lighting Control System Based on Industrial Wireless Technology

2011 ◽  
Vol 467-469 ◽  
pp. 620-624 ◽  
Author(s):  
Jun Wang ◽  
Wei Ru Chen
Keyword(s):  
Control System ◽  
The Internet ◽  
Control Technology ◽  
Wireless Technology ◽  
Lighting Control ◽  
Turn On ◽  
Point Control ◽  
The Cost ◽  
Research And Design ◽  
The Internet Of Things

The intelligent lighting control system is one of typical applications of the Internet of things. The method of intelligent lighting control system based on industrial wireless technology is proposed in the paper. It used proposed three-point-control technology, and adjusting the brightness of lamps, turn on/off the lamps and a part of fault detection can be realized. At the same time, it can greatly reduce the cost of system. It will be useful to engineer and researchers.

Research on Automatic Control Technology of Tobacco Manufacturing Process Based on IDEF Method

2015 ◽  
Vol 740 ◽  
pp. 265-268
Author(s):  
Yang Hua Gao ◽  
Hai Liang Lu
Keyword(s):  
Automatic Control ◽  
Manufacturing Process ◽  
Control Technology ◽  
Actual Situation ◽  
Bottleneck Link ◽  
Logistics Process ◽  
And Function

In this paper, the author does a study on the China tobacco Zhejiang Industrial co., LTD(ZJ) through building the IDEF0 & IDEF3 models, which can well present ZJ’s logistics process and function. By analyzing the model, the author find the bottleneck link and problems which will affects the efficiency of tobacco manufacturing process, and put forward the author's suggestions according to the actual situation.

The Application of the Vector Control in Centrifuge

2012 ◽  
Vol 490-495 ◽  
pp. 2937-2941
Author(s):  
Feng Ou ◽  
Hong Chen ◽  
Xin Xiong
Keyword(s):  
Control System ◽  
Vector Control ◽  
Regulation System ◽  
Control Technology ◽  
Speed Regulation ◽  
Regulation Method ◽  
Very High

In order to ensure the stably operation for centrifuge, this paper presents a new speed regulation method based on the vector control technology, and designs the control system with the inverter for the centrifuge. The paper introduces the fundamental principal of vector control, and analyses the power and torque required for the centrifuge from the result of the calculation and simulation. At last, the paper shows the result the application of the vector control technology in centrifuge. The result shows that the vector control speed regulation system is simple, reliable, and its acceleration stability is very high. The analysis can also provide a reference for similar centrifuge design personnel

The Simulation Study for Auto Electrical Seat Controller Based on Fuzzy Control Technology

2011 ◽  
Vol 383-390 ◽  
pp. 7328-7331
Author(s):  
Lan Jiang Zhang ◽  
Gui Jie Wang
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Effective Means ◽  
Nonlinear Function ◽  
Control Technology ◽  
Highly Nonlinear ◽  
Adjustment System ◽  
The Mathematical Model ◽  
Seat Adjustment ◽  
Controlled Object

Designed the control system policy for automobile electric seat using fuzzy control technology, therefore established its control model by Fuzzy Logic Toolbox, and carried on the off-line simulation to choose controller's optimum control parameters. From the dynamic viewpoint, the auto electric seat adjustment system is not only a complex nonlinear function which includes the location of the DC servo motor and the speed, but also contains serious nonlinear coupling interference, so the system is a highly nonlinear strong coupling, variable multivariable system. Application of traditional control methods (such as traditional PID) is difficult to meet its order requirements, so the research is highly robust method of intelligent control is an effective way to solve the problem. Fuzzy control technology has become the field in which drawn greater attention and researched in recent years. It doesn’t depend on the mathematical model of controlled object, has a good robustness, and nonlinear control characteristics, so it is an effective means to control the object with time-varying, non- linear parameters. In this paper, fuzzy control technology to achieve the orders of auto electric seat adjustment control system functions in the Literature [1], and the tracking of the system was simulated.

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