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Wysłany: Pon 9:38, 10 Sty 2011
Temat postu: ghd nederland Controlled blasting loose rock found
Controlled blasting loose rock foundation with good results
Earthquake breaking formula: V-KrR where ', - seismic wave seismic velocity (cm / s); (Pu-yi also initiating dose (kg) {R - blasting the building nearest distance from the center (m) j a dielectric coefficient; - shock factor Q and the corresponding values in Table 2, Table R 2Q and R corresponds to the value of Q (kE) R Remarks Bei house stone house foundation soil base (m) 2891.395 ① ... c1.1855728 where: a 22 .3 l11.181OK: Housing soil base 4.00l9.3012 basis 6.3530.70l {K = 20139.48 {set 8016 stone house foundation K701 & 5089.4020 = 5JT handsome 36.17l7 ● .7025 @ stone foundation is transmission of seismic waves 62.503131.80313 drawer full of rock .9 roar 2S.W9.303,
ghd nederland
, 51 Park .16715.50402 l Sapporo 9510i8.80I5 measures to prevent fly-rock: The deep hole close-packed arrangement. DTH drill drill. Minimum Low anti-line shall not exceed l, 9m, shot hole direction, the direction of the minimum low resistance line, towards the building is strictly prohibited. strictly control the amount of unilateral drug consumption and the amount of hole charge, the use of controlled blasting loose, so loose but not throwing the upper part of controlled blasting block length is not less than 2.4m, the earlier initiation front embrasure free surface. strictly controlled by pressure slag blasting action index n, blasting action index n is not greater than 0,5, with loose control of blasting, in theory, loose but not thrown, even if there is flying rocks, calculated as a safe distance from flying rocks. The formula is: A 20-watt and, - a safe distance from flying rocks (m) W - safety factor, to take tile 1.5; n - blasting action index, taking n - 0.5 for a minimum low resistance line. When a 1.5 (rn), then R, = 13.5 (m) as \4R, = 16.6 (m) Funeral 3Q and R corresponds to a value of 0 () Note (m) barrier of trees exposed kits kits 50.251.00 embedded data in the table, calculated according to shock wave 80.642.56, the formula Phoenix: Island √ island with hundreds l01.04.00 operator l21.445.76 level of security 3l | l_967.8 | bare Charge Methodist 56l Tsui Island = 1016 2 | All Embedded in Charge Island = 5204.00l6.00256 .25200309.003 & 0035l2.2540.004016.0064.004520.2581.005025.00l0 Tsui 005530.25121.006036.00144.0065 ● 2.25169.007049.00196.007556.252200 field engineering and technical personnel,
tory burch
, according to blasting Area distance from the building to determine the minimum low resistance, control the amount of hole charge and blasting action index \prohibit the disclosure blasting, control the amount of primary explosive at the same time. the formula: = ‰ √ Q and - a safe distance from the air blast (m) KB - scaling factor, and a 5 ‰ (Blow Hole) Q - while the amount of primary explosive (kg) Q and the corresponding values in Table 33 ‰ blasting results and analysis proved: In this complex environment under the conditions of implementation of the use of controlled blasting loose rock projects. so as to meet the original budget for all rock excavation quantities. not only good economic results, but also to speed up the progress of the project to shorten the construction period. As technology advances blasting, blasting of rock disturbance reduces the body, and loose control of blasting required significantly lower dose. For large-scale blasting operations itself the level of quality and cost of quality is extremely important. rock blasting, the slope of the basic shape,
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, after the artificial slope is more tidy rhino 4, the burst tolerance and quality standards in line with the relevant norms are in control of the level of elevation to allow less digging value within. width from the centerline to both sides of the volume is also way less than 400ram. These indicators are allowed within the deep wide value. seismic wave, shock wave and air Chung blasting and are effectively controlled,
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, so that in the past Buildings and other officers and 200m away from the blast area to ensure safety within. while speeding up the country road speed of the base construction of the project. by loosening blasting, the surface,
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, reducing the spacing of holes will increase the cost of excavation of rock 30, but the explosive costs less dq0, the crushing cost reduced by 20, to load and transport costs by 10%, the cost comparison of all these changes, the final cost savings of 10, so choose a good program and method of blasting is critical to . * 25 *
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