Jinling Iron Ore stage of the roof exposed area o

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Jinling Iron Ore stage of the roof exposed area of the Housing Act

Anastomosis. Exposed area of proven methods and general assumptions of the exposed area of the formula is reasonable, and can be used as general use to quickly identify exposed area. 5 Conclusion (1) under the conditions of the existing technology, it is difficult to determine stope x, Y-axis direction of the lateral pressure coefficient and cavity roof of joint development situation, to ensure a solid blank area, generally take a more conservative estimate, probably determine the stage of the exposure area of stope method. Based on the above discussion, for the period stope stope mining method exposed area (roof) used the following formula to determine a rough estimate, that is 1.66b. <S ≤ 2.52b, for example, when the mining height 40rll. Exposed area from 2.656m <≤ 4032m OK. (2) The stage of ore in mining operations in the Housing Act, personnel, equipment not directly into the empty area, so the exposed area of the roof can be considered relatively bigger, without causing large areas of mine roof collapse can board (continued on 47 page) 2OO1 in 1H / a dawn to pull away as dust-efficient multi-tube Xing application in the sintering plant relentless generous system of direct management of steel type. And with the level of Qi 2O boat. The new guide for the insult made spiral leaf gas line. Water into a 4. . Angle. Optimized air flow line Pa - reduced set D m of gas loss. To the production process of card】 anterograde. (4) more than the old meaning to kill the demon I1 instruct whirlwind milling. Porphyrin chewy. F}】 generally make 2 to 3 years. New multi-barrel rotary mining refuse sub j roar of high chromium cast iron. R the hunger of greatly increased juvenile. Increase the eyes of anti-r. Will generally 5 to 6 years 0 Conclusion (1) new multi-tube is based on the old Dobby transformation. Basis for action. Support Zhu action. Framework, the shell without making major changes. More than just dust inside the Xing business done, cut the end of the transformation. More weight than the old equipment to reduce bud 20 t. Indole this. Technology BU feasible. Empty BU feasible. (0) to teach new and more dust Xu Ling Meng Yu string more than the older and more substantial increase. Pressure loss constricted sentence in l2 [) I) ~ l5ooPa the question more and more old-fashioned tube Increased 004200Pa. Little effect on the sintering (3) replacement of high chromium cast iron gray iron Cyclone Cyclone. Allows it to double the life of pounds 』. The multi-tube dust-Yu overhaul overhaul life cycle and sintering machine simultaneously. Improve the employment rate of sintering hangdog port (on the next page the first zO) (z) selected raw materials, acquisition of China has gradually increased the proportion of mining stone, useful minerals disseminated ore with ore particle size distribution of regional differences and different, mixed with ore difficult choice received good results. (3) a general increase in the original process on the basis of fine sieve. (4) removal of various types of magnetic devices as magnetic paragraphs important adjunct jobs. The geographical distribution of ore processing capacity of about 5O million t of three medium-sized processing plant, a number of small-scale processing plant, although the large ore body no longer exists, but in adjacent areas with Lam's three provinces of Hebei, Shanxi Henan border area, also distributed a large number of large and small isolated ore bodies, there is still a relatively wide Xiang Liu market for these options as well as the development of plant life provides an important raw material base, and thus on the basis of the existing process by key local of technological innovation, further improve product quality, reducing operating success rate, improve economic efficiency ore dressing, become a consensus, and hiding in a certain range within the application, from the production situation in recent years, the use of secondary grinding operations and now more mature to match the fine sieve technology platform, not only improve the mineral processing technology indicators, but also increased production capacity, in dealing with non-uniform disseminated fine particles of magnetite ore, the show runs well and the results showed strong adaptation process capacity. 3 Conclusion of fine-grained disseminated magnetite ore sorting recycling, particularly in the grain size the case of uneven thickness, relying solely on a simple magnetic separation process, in order to get a good sorting index, will be very difficult, only absorbed in the full draw on the basis of scientific and technological progress, and establish a set of features compatible with the ore sorting technology, complemented by station management to technical adjustments by fine screen to control the granularity of selected materials, create a good work before the election environment, in order to achieve effectively improve the selection cut targets, full use of the purpose of export of mineral resources' on page 7). . . But the overall method of mining is not the case, personnel and equipment to be entered into the empty area to ensure the safety barrier operation, the exposed area of the request to determine the relative smaller. Mine production is still used in the relevant technical information requirements of the exposed area of 800m below the roof. If you experience broken or jointed roof rock is developed, must also be spray and anchor Bute local support, or leaving part of the point of a solid column in order to protect the roof mouth ● Guangdong literature: [1] r so stupid cream. Mine are rock mechanics [M]. Machinery Industry Press, Beijing t. 1985B, 100. [2] relentless world pressed glycosides. Metal deposits in underground mining (Amendment Ke) [M]. Beijing; film metalworking leek Press. 1986.
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