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Mine blast clean room floor several times during the end of the simulation


If you can confirm that the original weight of stope ore heap within the measurement accuracy, distance and angle of impact of weight many times does not actually throw the process of clearing the end of the incremental coefficient ratio. Take the first throw after blasting and evaluation of ore 1 ore increment after each blast, can be calculated stope blasting clear repeatedly thrown the end of the incremental coefficient than the target: 'Kj :0.654-0 .35 j ( 4) where: j a number of blasting. In this case, the correlation coefficient is 0.9, the standard estimation error is 0.25. Although the specific circumstances in each Kj indicators may be set for the limit Kj ... = m. ml = K (5) where: 1TIC a first throw of the ore Kc blasting the first blast threw a factor, therefore,[link widoczny dla zalogowanych], if known KC1, the available formulas (5) calculation of K. FIVE prisoners can worship, work hit Premier Health. }}} Of a single hole test blast of industrial-scale open pit, z satin evening to the edge of Germany can be. Development of a new open pit mine in operation for the total radiation,[link widoczny dla zalogowanych], the project (1983) completed a single hole in the model test members must focus on blast A complete security, economic and reliable design (ie, grain blasting) to study the explosives unit consumption, of dollars. In the design stage, blasting design is one of the most difficult line of least resistance, rock or similar rock material to a work ashamed geometry. In the blasting design, to be resolved and the physical properties of the two cases on the broken, the minimum resistance to the key issues down the line is the best of each hole and the hole charge mine the amount of volume and caving angle. Simulation test results are arranged in order to obtain good fragmentation, security boast satisfactory. Park, the Rustan and Lin (J987) of the blasting and complete the whole slope. Determined by calculating the explosives NordkalkAB completion of the company's limestone quarry and the optimal consumption per unit of minimum line to resolve the question of the industrial test research and some model tests, and two questions. Were compared and found that minimum line and some blasting Although designed to enhance the study of blasting, but explosive single parameter (such as caving angle, fragmentation) are closely-bit consumption and the value of most concern are still with the minimum line matching method does relationship. Open here in eastern Turkey Diweiliji iron set. Over the years, and from the field test data collected from the laboratory to the industrial explosion of single-hole test results were far, f consumption per unit to make explosives with different rock properties described below. (Such as tensile strength, density, resistance, toughness, stress and work crossing the mine lff Allium experience of crossing the key books Diweiliji 'rate) to determine the relationship between the built. Mine has A, B convergence of the two hundred meters away from ore, the main on the other hand, the optimal minimum burden on the value of love for the magnetite and hematite ore. Rock is syenite, (Bo) of the study is still not perfect. In order to design needs, too marble and serpentine. Step height and the circumference must also be in magnetite by means of empirical formula, such as Tamrock rock for the company 12m, in the hematite was 9m. Using the drill bit recommended Bo = (25 ~ 40) d, but Hagan made Bo = hole diameter of 193.7mm of? Yu 『vertical hole drilling rig hit. (20 ~ 35) d, Gutafsson make B ...; 45d industrial test hole blasting is carried out in the hematite,[link widoczny dla zalogowanych], (B ~ K / 2, K for the step height). The empirical formula is its physical and mechanical properties of compressive strength of 48.6l, Langefors formula is the most accurate, he made the most MPa tensile strength 16.59MPa} toughness resistance line for the small pore size, the weight of explosive strength, equipment charge density, 4.4 × 10kgm/mJ density 4404kg/In. , Constant rock pressure, charging structure, and pitch ratio of force and resistance wire wave velocity is 4903m / s, impedance is a function of 2.159x10 other factors. kglm ~ 5. As far away from the hole, caving angle will not improve the empirical formula,[link widoczny dla zalogowanych], Rustan ~ gVutakuri each weight bench, blasting the ore heap and throwing distance relationship to each other (4) Find the number of blasting blasting Kj because in between the two major period of time, ie within a week for 4 to 5 times throwing blast, with formula (4) Calculate the number of blasting should not only satisfy (5), but also to meet the conditions of Ki ≤ 5. If the calculation found in the largest possible number of more than 5 throws, it must be calculated for Kj = 5 Finally it should be noted that the simulation results obtained by the physical relationship, according to Gui (3) and (4),[link widoczny dla zalogowanych], not only sufficient in practical work accurately predict the results of throwing blast, but also can calculate the stope blasting several kits clear parameters and the end of the number of blasting. R039201-55 (Zhoushu Liang Zhou Guang Xi)
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