Lead and zinc mining field where the mouth hole d

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Lead and zinc mining field where the mouth hole drilling technology

Data card choking, control of drill pipe diameter is increased the effective rate of arrows left deviation drilling diameter, 3.2 ore structure on the accuracy of geological drill hole quality on the impact of a certain ho. When the drill bit used to meet more acute angle of the transfer of hard rock and soft rock face, bit easy \Si or crack occurs when pus from an irregularly curved. the stability of the device and the drill pipe stiffness of less adverse circumstances, the deflection will be more severe levels of drilling technique .3.3 accuracy of the operator of the equipment is improperly installed, adjust the angle of the design was not allowed. openings do not pay attention to avoid the ramp when, after the failure to finish on the drill hole angle for review and correction, residue into the hard rock by the song when the incorrect pressure. Drilling extension of exploration, the pressure control are unreasonable, and so lead to an important reason for deviation drilling. 3.4 rig the gap between performance and design requirements require control of the drill deflection rate of 1 within the realization of sickle card blasting blasting design effect of the basic conditions, but the existing drilling equipment is more difficult to achieve. such as borehole inclination bias 1996 No. 5 Mine Design and construction of metallurgical difference is 0.7 45.. deflection rate will be greater than l, which are now Some angle only, or whether it is random from the specific, the error is 1.. even if the instrument does not exist error, drilling frame on both sides can not reach an absolute balance. in the measurement process, often appear on the left of 00., To the right was measured to be 89.. Thus the objective to not have the exact design requirements of the drilling conditions. coupled with geological factors and operational reasons, requires most of the holes within the deflection rate of 1 there is still some difficult. Of course, depending on the situation and take appropriate measures, in particular to improve the operating level, the deflection rate than pour l increase can be achieved. 4 4.1 hammer drilling efficiency on the efficiency of test drilling that the same structure in the hammer, raising hammer impact energy per minute, increasing pressure is to improve the drilling efficiency of the most effective means. drilling speed and impact energy of the impactor is proportional, therefore, improve the impact is operating air pressure, so the impact energy increases, the drilling speed will matter to a higher-fold increase. can be seen from Figure l drilling speed and pressure, wind pressure impactor and the relationship between operating parameters (see Figure 1 .), thatch =:,! ■ plaque-side ring with a hammer drilling degrees, the relationship between operating parameters and air pressure 4.2 performance of several of the impactor impactor C-100 equipped with YQ-100 Drill is still a lot of places. It looks small, the impact function is small, suitable for low pressure. with a three-wing alloy {hole mass ratio of total column head gear alloy bit high, ahead of the main reasons is that it has a boss, form two diameter, contain play the role of each other, it's knife-type alloys in broken when the rock wall to better protect the hole. However, low efficiency, alloy easy to fall off, short life and high cost. B-type impactor impactor is the J series the second generation of products, it has a single impact energy, low power consumption, fast perforation characteristics, but not suited to high pressure. drilling more efficient than C-100, inferior in terms of protecting cell wall C a 100. so bored of poor quality, to add stability in the case of rod drilling device may be a corresponding increase in quality. JC150-type impactor is modeled COP62-based, durable, long life, but the fault more slagging poor performance less efficient in the mouth of mine who has been eliminated. CZ150-type impactor for the J series to improve the product, it has high efficiency, slagging performance, less failure, and simple operation. It uses the circle button instead of COP62 Card solder ring, so that a drill sleeve connected with the card solder. facilitate the loading and unloading, but the card is put to drill horizontal and vertical drill a l9 drill a hole 8 of the lie, to a certain extent, reduce the strength of the card solder sets. in the use of fracture during the 80 places are pin holes in the side we can see that, to adapt to high frequency, high pressure of the drilling work, the structure of the card has to be for the drill set for further improvements. 4.3 to reduce equipment failure is the effective way to improve the drilling efficiency of existing equipment, when the work pressure is 1.3 ~ 1.5M77a, ore hardness of f = 8 ~ 10, the per hour footage 8m, according to Taiwan class net drilling 5h calculation, Taiwan class efficiency of up to 0m / classes, but the statistics seen in 6 mining field, the average efficiency of integrated sets classes only 24.65m / class. The reason, in addition to some of the inevitable objective factors, such as the mining field harsh conditions, the impact of poor quality control and geological factors, the equipment failure is an important reason. Therefore, to enhance equipment management, maintenance and repair, improve equipment utilization, is an effective way to improve drilling efficiency. Received 1996 -7.12 About the Mo Quang Binh. Fankou Cheng Assistant Engineer if zinc machine. A Ⅲ. N) quantity Xiao fear
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