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 Wysłany: Pon 16:49, 08 Lis 2010 Temat postu: ghd haarglätter Safety facilities and burst R W v |
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Safety facilities and burst R / W value is closely related to
__--。 _'--・_・ L___ - ●. -・--_______・_ H_. ・_-_--____・_____ U____ ・______-・,[link widoczny dla zalogowanych]。 __'__q - _______-・-・・____-_・_・。 . _ An ideal R / W value. Previously discussed the best security blasting must follow Ju Q ≤ Q, and has obtained Q: p ・ W. And Q: = B ・ R. Therefore pW. ≤ BR. Established. Re-order can be drawn: R / W ≥ (p / B) (7) with equation (7) to calculate the R / W value. Richard from Table 2, P = O. 4 ~ 0.7 (kg / m.), Just to loose to the effect of the blasting, explosives consumption it should not be too commercial. Whichever is the lower limit for safety o. 4. The p: o. 4 and p = 9.5115 × lO ~ lX10 into the formula (7) was: R / W ≥ 3.4 ~ 34.8, which means that blasting in general terms,[link widoczny dla zalogowanych], agreeable to Q ≤ Q:, R / W is the value of not less than 3.4 to R = 0.2, the blasting operation,[link widoczny dla zalogowanych], for example, calculation of a burst 13 \. , I \Now in use in the filling material component to lignosulfonate CCB, C. Ⅱ B and other air-based adsorbent agents, plasticizers and surface active substances of the information made public. With a surfactant chemical additives to improve the strength of the main ears of the growth rate and improve the transport index (for segregation stability) and reduce water consumption, reduce the pipe hairpin bottle filling material resistance and save cementing agent, and so on. Also, chemical additives are generally not considered material to the cement filling the possible impact. Mining and Metallurgical Company Norilsk mining method with cemented filling when the copper-nickel ore, there have been filling the contact surface near the mine down the process of the problem of depleted ore commodities. Mixed ore per year were selected 5O million tons of filling material The fact that the seriousness of this problem. In Tal Jonah ore processing plant selection,[link widoczny dla zalogowanych], due to focus on the light filling material media products,[link widoczny dla zalogowanych], so using a light satirical first medium and heavy medium separation process. Processes of each individual medium and heavy medium light dressing, but the recycled water is the main component of these two processes. Tal Jonah wide selection of water use of closed circuit. Addition of cement filling compound with chemical additives and finely ground ore, part of the slurry again dissolved in the liquid phase, the liquid phase after precipitation of the concentrated pool into the circulation pool. Therefore, the filling compound of the chemical additives into the recycled water. With the recycled water into the flotation tank. Mining League plus C. As Preparation of cement additives District Ⅱ B Q-≤ Q: When's the ideal R / W value. B is much smaller than the Q Qz the reason. (V / K). / 'On behalf of the equation (7) was: R / W> (O / B): P. (K / V) t /. Known P = 0.4, K = 150, a = 1.5, V = 3 则 R / W ≥ p-(K / V) 1 = (O.4) / x (z5o / 3), ・ = 10, which means that in order to make the blasting zone Q ≤ Q, ~ 1] R / W value of not less than lO. (In the range 3.4 to 34. . Find the critical area is the actual R / W value. Known R. = 0.2 m, a = 0.4 米, b = 0.45 米, h = 1.1 m, it is a falling one by one Wl (a ・ b.h) '10 .2 (0.4x0.45x1 .1) 1 =- o. 34 Clearly, 0.34 is far less than l0. This is the area of the explosion of a 14-Song 1. Construction blasting in general, in order to charge the amount of actual blasting blasting in full compliance with safety regulations, must meet the following conditions: heart and to be protected critical distance between the minimum line R and the ratio of W R / W ~ 3.4 ~ 34 .82. For each specific area in terms of critical theory, the best R / W value can be calculated as: R / W ~> p, 3 ・ (K / V,, 3. Blasting show that when R <1 or R-O, the actual R / W is less than 3.4 does not mean that accidents will happen blasting appears furthest to the safety of drugs charge less than the actual amount of the phenomenon, in theory, the situation is normal {. However, the explosion area R / W value is less, the place the greater the risk of explosion accident. the existence of security applied burst R / W's minimum needs further study.
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