Scalable cantilevered Development of Coal

kinganubis

1. abstract
Scalable cantilever loaded coal-mining conditions applicable to the Warehouse, the main increase Warehouse exploitation of resources recovery and reduce labor intensity of workers, to increase the safety and reliability of operations at the scene.
   Key words:  scalable;  Coal;  Warehouse mining;  recovery

2. Introduction  
With the extension of the mine length of service, increase productivity, the mine's remaining recoverable reserves will be gradually reduced, the market competitiveness will continue to decline. In our country there are many old state-owned mine due to depleting resources, production of convergence of tension, conflict and so difficult to replace mine, a decline in production, lower benefits, the operating difficulties of the situation. In order to increase production to mitigate pressure on the operators to extend the mine life, most coal mines has increased the corners of coal, coal-mining efforts. Against the mine in the coal mining corner, when the widespread use of coal-mining law of the Warehouse to the characteristics of Jincheng Coal Industry Group under the Technology Center at the actual needs, through research and development applicable to the Warehouse under the conditions of exploitation of scalable with cantilevered Coal,

3. With the structure of coal  
Scalable cantilever loaded coal mainly by the rack, cantilever, Rotary, walking, supporting fixed, carrying bodies, hydraulic systems and other parts of composition, its shape structure see Figure 1.

1 - the crane  2 - Doo- 3 - before the support of  4 - emulsion winch  5 - walking mechanism  6 - Rotating bodies  7 - control valve  8 - support after  9 - rack  
Figure 1 scalable with cantilevered structure of the coal –
3.1 rack  
Rack is loaded coal-bearing the main components, all components are installed in the rack.  
3.2 cantilever  
Cantilevered from an arm, two arms, three-arm, two-cylinder telescopic emulsion composition, and between the turret connected with Pin. As three-arm nested in the two arms, two nested in one arm arm, stretching emulsion in the secondary role of the cylinder, the cantilever stretching movements can be realized, stretching capacity of 3 670mm ~ 8 270mm. On the other hand, two fixed rotating platform of change in the role of Jack, the cantilever can achieve take-off and landing movements, lifting capacity of: 1360 mm ~ 5 000mm.
3.3 Rotary agencies  
Rotating bodies from the turret and fixed rack in the lower side of the two rotary jack in the rotating platform equipped with cantilever, winch and other parts of the emulsion. Rotary jack in the drive, the turret driven cantilever to do about the direction of rotation, left and right direction of the swing angle can reach 45 °.  
3.4 loading mechanism  
Emulsion carrying bodies from the winch and rake bucket component. Emulsion winch 2 Taiwan, one for heavy use, another Taiwan for a light-load; characterized by the emulsion motor powered motor rated pressure of 12. 5M Pa, traction 1.0-2.0 speed, traction 10 kN ~ 20 kN. Trailing bucket volume is 0.5 cubic meters of coal loaded containers from the emulsion winch drag achieve reciprocating movement, thus completing the coal loaded with coal movements.
3.5 Support fixed institutions  
Support institutions fixed by the former support, and stabilize the column and Baojin device components. Charging for work, installed on the rack by the front of the former roadway in support of support on the floor, installed in the rear of the rack-supporting stability in the tunnel roof, installed in the rack below the fuselage will be installed Baojin And the chute together to ensure that the fuselage will not move around and dumping.
3.6 operating agencies  
Institutions run by walking the track and chute walking institutions. Walk the track body is designed for ease of transport machinery, to gauge the the machine forward and backward. The work pressure of motor running 12. 5M Pa.  
3.7 hydraulic system
Hydraulic valve block from the hydraulic system, hydraulic piping and other components, cantilever stretching, lifting, rotating, the machine running, the winch, and so on are positive and hydraulic valve block to control.

4. Charging for the work process  
Scalable cantilever loaded coal principle of the work shown in Figure 2. As with coal at work to be powered by the emulsion medium, it also needs pumping stations equipped with a set of emulsion. Charging the work carried out before commencement emulsion pumping station will be installed near the coal-to-door opened on the appropriate location, operation of the institutions supporting fixed machine fixed, and that is to start working with coal.

Figure 2 scalable cantilever with the work principle of coal
First of all cantilever will extend to the appropriate length and height, light-load operation of winch will rake bucket of coal Meidui pulled down with density 1. 5 töm 3, simple geological conditions, degree of high pile of coal, coal expense of working hours must be extended
6. Conclusion  
1) scalable cantilever with coal as the cantilever function, so that no staff and no caving into the supporting areas, you can achieve with coal, greatly improving the safety;  
2) by the winch, rake bucket with coal instead of the original artificial Huo coal, reducing the labor intensity of the workers;
3) loaded with coal coal scope than the original scope of Coal, increased resource recovery;  
4) machines simple structure, easy operation and low cost, easy to promote;  
5) machines in the cantilever landing, his walk, power winch, ropes and other aspects of roller inside remains to be perfect.
7. Other new equipment on the coal  
7.1 ZMC-30-Hydraulic
side dump with an overview of coal  ZMC-30-Hydraulic side dump loaded coal rail line is tracked loading equipment, mainly for coal, coal-alley, can also be used for small section whole rock alley, with insertion of large,undercover, the Qing help, can significantly improve tunneling Speed, a good comprehensive economic benefits. Technical details are as follows: technical bucket volume: 0.45 cubic meters; bucket height: 1 348 mm; rated contains important: 30 kN; unloading the largest high: 1 185 mm; largest undercover depth: 600 mm; climbing capacity: 16 ° The average ground pressure: 0.07 MPa; rated traction: 20 kN; minimum ground clearance: 180 mm; biggest walking speed: 0.417 m / s; plate tra
7.2  ZMC-30-Hydraulic side-loaded coal unloading equipment supporting the transformation of (achieving Liuzi, belt "loaded integration")  
As ZMC-30 type aircraft with the use of coal in underground places, narrow space, the tunnel roof and coal for constraint, loaded with coal in the process of coal needed Liuzi (see Figure 1), the use of roadway transport belt, Liu Zi each Classes should move forward first. If Liu Zi and the lap belt between handled properly, will directly affect the tunneling speed. After leading the mining area and the practice of engineering and technical personnel at the scene, Liu Zi will be the first fixed on the end of the belt, so as to form a whole, to achieve Liuzi belt loaded with the integration so that each class can smoothly shift the slip

Figure 1
7.3  ZMC-30 side dump with the merits of coal  
(1) well-ventilated, mainly in coal Duct not be squeezed, dropped, and always maintain normal airflow, no gas gauge.  
(2) a large space, work environment, and always face up to allow Yicha guns of the coal, employees in the work of the safety factor increased substantially.  
(3) operational safety, workers can significantly reduce the labor intensity, loading feature strong, tracked walking into force, to achieve full-face loading, applicable to all sections of the EOC, ramps roadway construction, the roadway or in the larger cross-section of roadway intersection Construction, we can give full play to the characteristics of its high-tech productivity.  
(4) of the complex, and mobile and applicability, and other equipment in the roadway (such as bolt rig, drilling trucks, scraper conveyor, belt conveyors and mine car) supporting the use of.
(5) the use of a machine is ZMC-30-Hydraulic side dump loaded coal is superior to other types of coal with the main characteristics: 1) available bucket lift heavy objects, such as supporting the use of metal stents, Margaret Fetus. 2) Lifting bucket after supporting the work could serve as platform for roof management. 3) may face short-distance transportation of materials, such as the backplane, gravel, moving small equipment. 4) for other equipment to provide high-pressure pumps, such as hydraulic powered drill bolt. 5) operational safety, can significantly reduce the risk of regional loading operations, moving material time. 6) the local excellent undercover, the performance will help the first-loading operations to achieve 100 per cent of the mechanized so that the "no-shovel" Face really become a reality.
7.4 on the existing problems  
(1) If the loaded coal cars and supporting direct use, will be bucket lift height restrictions, 3 t mine car on the roadway floor flat to a high degree of 1.4 m, the loaded coal unloading height of 1.185 m can not be used, To be re-targeted.  
(2) Cable drag protection issues, the aircraft operating in the process of dragging cables, the only person in the plane after a drag, there is no better way.
(3) spray sprinklers, in handling the plane, not a random spray sprinkler dust supporting facilities, are currently only artificial rinse dust.  
(4) with the use of coal in the course of the operation of the plane found that poor people's attention, bucket raised at the block out light, the lamp voltage design unreasonable, the lamp is very fragile.  
(5) with coal in the course of operation at the scene and found the transport system must be open normally open to ensure normal production, otherwise affect production.

kinganubis

Based on onsite vibration characteristic tests of 300 MW turbogenerators， a calculating method suitable to dynamic balance is worked out， and representative coefficients that affect dynamic balancing are optimized. According to rotor dynamics and the experience of vibration tests of 300 MW turbogenerators， the diagnosis logic for abnormal unit vibration is sorted out， and a diagnostic calculating software for dynamic balancing is compiled by using Visual Basic.NET language. This system has friendly manmachine interface and selftaught function. The software of the system can be incessantly selfimproved in use.
The steamship power set's vibration is affects the unit and one of electrical network stable movement common breakdowns. In recent years along with the design, the manufacture and the maintenance level enhancement, the unit stability gradually enhanced, but because of vibrated but the temporary engine off phenomenon still sometimes occurred. In 2002 the Hebei Province electric power company established "300 MW unit vibration characteristic research and the scene transient equilibrium breakdown diagnosis system development" the project, the research has obtained 300 MW unit's vibration characteristic, and developed unit transient equilibrium computation software take this as the foundation and diagnoses the expert system. When the unit vibrates exceptionally the user will only have unit's vibration data feeds this software system, to be possible to obtain the diagnosis result which a unit  transient equilibrium plan or the unit exceptionally will vibrate. This regarding guaranteed 300 MW unit as well as the entire electrical network stable movement has the great significance. This system may supply other types the steamship power set to profit from.
(1) Topic plan
At present the large-scale steamship power set all has the quite complete TSI system, according to the national related vibrationstandard, 300 MW and above unit inspects the revolution axis the vibration. Each axle bush all has X, the Y 2 directions axes inspires the measuring point, these measuring points can provide the vibration the oscillation amplitude and the phase information, including passes the frequency oscillation amplitude and the base frequency oscillation amplitude, some systems also can provide 2 times of and 0.5 time of oscillation amplitude. The transient equilibrium is the scene is most common effective disappears inspires the method, the algorithm and the influence coefficient which the software system basis studies carries on the transient equilibrium computation, provides carries on the transient equilibrium computation by the graph form to aggravate the result and the remaining vibration computed result, therefore does not request using the personnel to have the very high vibration specialized standard, does not request to have other instruments and the

equipment.
(2)  Transient equilibria computational method
Influence coefficients optimized selection
After has decided the transient equilibrium computational method and the measuring point selection principle, very more importantly influence coefficient determination. For many years several hundred data which accumulates in the practice compile the same place, according to aggravates the plane and the measuring point different separately classifies. Actually each time carries on the domestically produced 300 MW steamship power set scene transient equilibrium to be able to accumulate some influence coefficients. But differently works the influence coefficient which accumulates to have mutually to compare, mutually to profit from, then must unitize the condition Around the influence coefficient is decided to aggravates the vibration change quantity and adds the weight, aggravates the quantity quite to be easy accurately around, but aggravates the vibration change quantity already with to aggravate related, when receives the survey the unit other aspects, like 2 oscillator measurements opportunity bunching parameter is different, the survey by mistake the inferior influence. Therefore the coefficient accuracy is relative. The influence coefficient the different time work obtains which on the identical unit also slightly has the difference. In order to obtain has the representative influence coefficient, has carried on the weighted average to it, its weight coefficient selection determined according to the transient equilibrium effect fit and unfit quality. Effect good power significant, otherwise then small. Regarding different unit, because its sensor installs the position to have differently, therefore the phase data cannot the direct comparison. The partial domestically produced 300 MW steam turbine low-pressure  spool transient equilibrium influence coefficient statistics see Table 1. May know by the table, speaking of the identical unit, the influence coefficient peak-to-peak value average to in approximately 6.8% ~ 15%, but the phase equally leaves  basically in 14° within. But the different unit influence coefficient peak-to-peak value synthesizes in equally leaves the obvious increase together, between 15% ~ 25.8%. This is because the different unit characteristic slightly has the difference, for example the measuring point installment drills a hole the disalignment, the axis inspires the sensor to lengthen by joining the pole rigidity to be different can affect. Even if has these differences, practices the certificate different unit the influence coefficient mutual model is effective. Through rejects these effects difference the influence coefficient, again carries on the average calculating operation to be able to cause the influence coefficient the reliability high, the model is better.
(3) Conclusion
All above has introduced 300 MW steam turbo-generator set scenes dynamic balance diagnosing calculation system , has calculated or has diagnosed the dynamic balance owing system the expert experience who has assembled , making use of aircraft crew TSI data to be in progress. Calculating to a nicety , being put into use going to the lavatory in indicating system's , being turn in connection with upper application of aircraft crew, has been penetrating , the problem resolving vibration of the aircraft crew has provided one kind of effective means to the scene.

lgp0204

楼主搞点中文的，能全懂的不多呀