DETERMINATION OF RATIONAL MAGNITUDE FOR RULING GRADIENT IN CAPITAL TRENCHES WHEN RALIWAY TRANSPORT USED
نور الدين حسن علي
معهد التبين للدراسات المعدنية · مصر
Speedy development of computer - technique provides a means for solving multivariate specific problems of any branch of industry. At present compter technique is also used in mining industry for solving various problems both in designing and in operating mining enterprises. The subject of this diploma is determination of rational magnitude for ruling gradient is "determination of rational magnitude for ruling gradient in capital trenches when railway transport used " this problem has very many solutions and may be solved only by the electronic digital computers. To solve any problem by means of a computer one must make up a programmer for it. This programmer must express logical mathematic essence of the given problem. Such aerogramme has been made for a computer of Mir - 2 types. On designing mining enterprises cam use this programmer for solving the following problems: determination of the value of the ruling gradient in capital trenches / determination of the mount of mining and capital worke / the choice of extracting and loading equipment / the choice of transport vehicles for striping and mineral works determination of the weight and number of trains necessary for carrying out the present volume of work in the quarry ete. Analogous problem had been solved by means of a computer of "Mir - 2" type for the area of choragi iron ore deposit. The computer solved and typed the results of 147 variants of solutions; each of them can achieve the assumed annual productivity for the curry which equals to 7 million ton of the north Gobi iron ore. The best variant has been chosen as a result of techno economic comparison (according to minimum summary capital and operational expenses). For this variant when mining the mineral deposits of 7 min. Tons of ore as annual efficiency the following indices should be adopted: 1. Rational ruling gradient is ir = 26.86 % / 2. Number of dump cars in a train is n = 3 / 3. Carrying capacity of one ear is q = 93 t / 4. Adhesion weight of a locomotive is pc = 100 t / 5. Number of working trains is n = 8.15 / 6. Total average time for a train trip is t - 75 .14 mta / 7. Number of excavators of kegs - 4.6 type is 3 / 8. Diagram of face track is k - 3 - a / 9. Coefficient of time utilization of an excavator is k t = 0.86
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