blast hole driller training

blast hole driller training

Next, the noise environment of mine machinery is the chief factor that affects health of collier body and mind, mine machinery noise basically includes mechanical vibration noise, bump noise, fluid noise 3 sort.

Warm-up 20-50 second answers when engine low temperature is started, start instantly next.

, the protector of leakage of electricity that Q2 is total feed switch and branch feed switch to require furnish instantaneous action respectively, q3 is magnetic force starter general a protection of closedown of furnish leakage of electricity 2 leakage of electricity protect principle analysis to be in system of ground connection of small electric current, accurate searching circuitry of single-phase ground connection is a difficult problem all the time, in the electrified wire netting that encircles ground connection via disappear arc in neutral site, this kind of difficulty is greater Advanced a variety of protection principles for this protection worker, mix like principle of admittance of half first principle of direction of power of have rendered great service, harmonic principle, principle, signal infuse principle, energy principle, 0 foreword the principle that with small wave photograph of network of analysis, nerve integrates These principle methods apply at producing practice with union of contemporary microelectronics technology, solved a lot of ground connection to select line issue, but choose a line to forbid to reach sign up for a phenomenon to still happen from time to tome by accident The 21 6kV that are based on admittance increment principle change alternative leakage of electricity protects electric place afore-mentioned place are enumerated principle of protection of alternative leakage of electricity is on application, choose the case that the line forbids from time to tome This basically is concerned with the following circumstance Ground connection phenomenon is very complex: Can divide wait for instantaneous sex ground connection, stability ground connection, among them every kinds of means includes the type such as ground connection of direct ground contact, resistor sex ground connection, electric arc sex again Cause the complexity of fault signal thereby 0 foreword of ° voltaic transformer character is abhorrent and when transformer encounters dinky signal, great signal and bizarre signal serious and lack fidelity, cause difficulty to signal identifying The itself in ③ electrified wire netting contains a large number of not affirmatory harmonic, cause an effect to be based on the protection of harmonic principle * throws the effect of network system parameter, degree of the equilibrium rate that basically is the bulk that the system holds to terrestrial electricity, system, compensation of electrified wire netting, change of electric place circuitry how many and the accident of circuit To the protection of alternative leakage of electricity of power supply system of colliery high pressure, must decide corresponding protective principle according to the characteristic of its oneself Power supply system of colliery high pressure has the following characteristics: Circuitry of ① power supply is given priority to with cable, and the cable of the power supply below Xiang Jing is very long, the proportion that takes length of cable of whole electrified wire netting is larger ° colliery power supply is given priority to with electric machinery, the system balances a gender relatively the electrified wire netting that gives priority to with trolly wire is good much ③ because negative charge of the power supply below colliery well is big, report changes to use many collateral cable to leave the case of power supply to the well at the same time on need well Power supply system of ④ high pressure uses neutral site not means of ground connection or ground connection of circle of arc of disappear of neutral site classics The characteristic that is aimed at colliery power supply and the cause that cause protection of alternative leakage of electricity to be chosen by accident, the article put forward a kind of new protection principle to be based on the alternative leakage of electricity that admittance measures to protect a principle If what road of connecting terrestrial electricity of sheet of power supply system of colliery well 6kV shows: When K is opened the system is nodded for neuter not ground connection run mode, when K closes the system nods run mode of ground connection of coil of classics disappear arc for neuter Nod to neuter not the 0 foreword admittance that by knowable electrified wire netting normal circumstance leaves each line is ground connection system circuit and the 0 foreword admittance that are not fault line are J of * respectively the 0 foreword admittance of blame fault line is a system total ground connection, to neutral site classics disappear arc encircles ground connection system to be able to get IYkl by type (3) with type (4) the quantity of 0 foreword admittance that the quantity of the 0 foreword admittance of visible fault line is more than blame fault line far Among them the 0 foreword admittance of the circuitry below normal circumstance can pass ground connection experiment to get, and every produce ground connection breakdown its data is updated, so that dog in time the change of parameter of electrified wire netting See at the same time no matter line of the fault when the accident of fault line should produce breakdown of leakage of electricity the ground connection admittance that the quantity absolute value of 0 foreword admittance is this electrified wire netting, the quantity of 0 foreword admittance of line of fault of and rather than is 0 Because this is OK and accurate,distinguish a fault line and blame fault line And 0 foreword admittance measures fault line the size of the ground connection resistor when the size of absolute value and breakdown of leakage of electricity and property have nothing to do, because this can overcome afore-mentioned causes that cause protection to be moved by accident Collateral to two circuitry ends to Jingxiazhong change the circumstance of electric place power supply, the series connection of transformer of 0 foreword electric current that can agree through two character will because electric current is lopsided,be solved the error that cause, the alternative leakage of electricity that via changing a few times electric place installs protects this method the proof is reliable and effective The protector of leakage of electricity that the switch of total feed of principle of protection of leakage of electricity of switch of 22 total feed is in is switch of responsible total feed the protection of leakage of electricity to the electrified wire netting between switch of each branch feed, and the back-up protection action that leakage of electricity of switch of each branch feed protects, the leakage of electricity that can use additional direct current source protects a principle, if what show The electricity that place of additional direct current source produces uses method of addition of admittance of have rendered great service to be able to reduce the effect that ground connection resistor protects to leakage of electricity as follows, the behavioral value that makes leakage of electricity is protected is more certain, and the effect that does not suffer run mode, this is its advantage The implementation of protection of 3 alternative leakage of electricity adopts principle of protection of leakage of electricity of additional direct current source at the same time measure sampling resistor foot: The voltage of two end is calculable give voltaic value to be able to get through type so (7) the insulation resistance of the OK and successive electrified wire netting that monitor; Should produce breakdown of leakage of electricity, when the movement that makes R achieves device set is worth, excise power source quickly At the same time it also can monitor insulation resistance to drop equably, and monitor signal to realize closedown of leakage of electricity to offer Itself of principle of protection of leakage of electricity of additional direct current source is not had alternative, what the leakage of electricity between its and branch feed switch protects is alternative can come true through delay time The principle of protection of leakage of electricity that the leakage of electricity of 23 branch line protects principle branch line also can use half first principle of direction of power of have rendered great service, harmonic principle, principle, signal infuse principle, energy principle, 0 foreword admittance principle and with small wave, but cannot come true considering branch line change the group of protection of alternative leakage of electricity compares electric place, than, compare circuit at the same time less, circuit is shorter, and dot of neutral of electrified wire netting compensates ground connection via reactance, and compensate degree do not decide, because this is in the protection of leakage of electricity of branch line,undertake improvement to be based on the leakage of electricity of admittance increment principle to protect a principle, use the protective principle of increment of admittance of have rendered great service namely, criterion the protection of alternative leakage of electricity that fault line and the absolute value of increment of admittance of have rendered great service that are not fault line are a tradition is used than photograph, than circuit will design, use imitate circuit to come true, ability of its interference rejection is poor, the intelligence that cannot realize device is changed And the implementation of automation of the distribution below the application that the success application of the development of personal computer technology and personal computer protection in power system issues personal computer to protect for the well and well provided a very good example Alternative leakage of electricity protects the personal computer form that accordingly article design gave to have communication function If its principle is shown with place The protector of leakage of electricity that block diagram of principle of protector of feed switch leakage of electricity uses admittance increment principle is used via spot of many mine electrified wire netting make clear, have the accuracy choosing a route of 100% to stable state ground connection The protection of leakage of electricity to total feed switch and branch feed switch uses leakage of electricity of additional direct current source to protect principle and principle of increment of admittance of have rendered great service respectively, and the feed switch that has integrated protection function and communication function is integrated protector, use a proof via many mine accurate and reliable The article offers 4 last words and analysed be based on admittance increment principle and the leakage of electricity with principle of additional direct current source to protect new principle, can raise the dependability that alternative leakage of electricity protects mine electrified wire netting greatly, gave out the criterion choosing a route of admittance quantity principle and add dc principle Development went to be based on admittance to measure a principle to change electric place personal computer chooses buy of traditional thread binding and the feed switch that be based on principle of additional direct current source or are based on admittance of have rendered great service to measure a principle personal computer is integrated protector These device classics spots move make clear accurate, reliable; And these device have function of personal computer communication, offerred a possibility to implementing mine distribution automation .

Accordingly, be necessary the characteristic according to mine of this copper sulfur, begin the mineral separation engineering technology that has specific aim to consider, improve the scene thereby grading index, provide technical basis to produce technical reformation.

Hydraulic pressure oily crude oil is after refine, fight oxidation according to needing to join, fight grind, bubble of antirust, disappear, extremely pressure, fall coagulate the hydraulic pressure that waits for additive modulation to need into production is oily.

Qian Kongzuan of manufacturer of borer of the well in A of drilling machine of project of solid of anchor of material of bad news of form a complete set of borer of drawbench of pedrail borer hydraulic pressure has promotion.

The respect communicates in international collaboration, geological investigation bureau and 36 Chinese national geology investigated an orgnaization to sign geoscience collaboration to forgive memorandum, with the world 50 many countries established cooperative contact; Hold management of mine of 14 period land and technology technically to groom for the developing country class, many 310 official that is 69 countries undertook grooming; Hold visit month and seminar of geoscience science international to wait 30 for many times important international conference and seminar; A batch of geological technologists are in association of coast of couplet of international ground division, international, international bed association and world geological graph makes up the international such as graph committee important post is held the position of in geoscience organization.

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