Juan Gold Mine Road, next to the layer of consoli

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Juan Gold Mine Road, next to the layer of consolidated filling into the causes and prevention of falling

Mining approach and the formation of the restorations are all vertical and horizontal layout, the actual production of such a layout that improves the stability of stope backfill. Arranged in the vertical direction when the hierarchical approach to mining, the target into the path length short (the thickness of the ore body), and in the middle of 'the mine as the center channel to the top and bottom direction of mining operations at the same time, it could significantly reduce the per a tiered recovery time. Meanwhile, in the course of mining operations, the upper part of each arrangement along the strike has only partially filling body exposure (equivalent to the width of the vertical approach), with no album to approach recovery with an extension of the road, filling the body of the exposed surface increasing, so the relatively good job security. And perpendicular to the direction of the approach to short, struck from the cut slurry filling phenomenon correspondingly weakened, help to improve the strength of filling Wei. However, this method is also adopted brush ~ negative side, that is required to increase the number of filling out the mine access tunnel and the excavation work, etc. In addition, due to beam eight apartment to be inserted in the solid rock, so Xu and more rock excavation part of the roof and floor . By rough examination, the cost of the increased workload, can reduce the filling pressure mineral loss and slump cycle mining operations to improve efficiency and get to make up. (Continued on page 24) 24 dark disc design and construction of mine No. 5 of 1995 during which more serious for some major implementation of technical solutions are obtained (as described in this article), so that decision-making on major issues without errors. 5.4 transferred to local contractors in mine construction projects, took only a few years time. Put open pit (infrastructure peel 3300000 m), waste rock field, crushing and screening plant, internal and external transport and roads, depots, total step-down stations, water supply and drainage, power supply and distribution, local auto repair facilities, and security environmental protection, Rong Bao health, welfare (total floor area of 2.5g million m.) completion of the project and other projects. This is no precedent in the history of mine construction. Completion of the project total investment of 58.5269 million yuan total, forming a 5O million t / a production capacity. It has been able to achieve such results, in addition to a long hospital quality and quantity with a certain level of innovative design, accounting personnel did not send a positive meeting with the construction services, primarily to implement merit-based selection of building construction bidding and construction team, reducing the large local construction companies and many contradictions, such as land acquisition, non-productive investment, mining the combination of internal efficiency and social benefits and other issues. Are unified and solved more easily. For example, the mining town of connection Yang Wu Highway 13.8kin, according to the design budget for the investment of 400 million, while the construction contract after the local planning regulations. Only 8 months, spent l4O million to build traffic. 5 +5 j set mines in the past could not control the investment is already commonplace, and even vote in several-fold, the design of the production costs are often much lower than the actual production, not out of scale for a long time to form a variety of factors so that the economic benefits of mining are not ill-building. Lu mine design is estimated at 53,736,700 yuan. Construction accounts for the 58.5269 million yuan, accounts for only 4.7902 million yuan more than generous operator (8.9), analysis of cost overruns mainly because equipment and raw materials prices rose too fast (estimated time of preparation of the beginning of l987, while the construction accounts is the end of 1989) caused. Lu mine production, the ore production schedule to achieve full design safety tt}, designed in 1992 to reach the scale of the 5O million t / a mine into production after the actual economic benefits, but also estimates more than the original design of indicators, the effect of higher than expected better. Lu mine now completed the case during the first three years included in Table 6. Table 6, the first three years after the mine into production over the economic table account only the process of building luxury Lu mine in the assessment of several major violation of the Ministry of m, there are not much to clarify the contents of the summary. In short Lukui Iron Mine design and construction model is a successful new model, select the mode of construction of small and medium sized mine of practical significance. The future development of the socialist market economy and development of the mine can be different according to their own conditions and characteristics of mine to promote the use phase, the metallurgical and mining of socialism with Chinese characteristics into a new type of mine, asked 1995-5-4 Received About Chenqi Zhang, Song 1955, graduated from the Central Institute of Mineral Mining Department, Senior Engineer, the incumbent Changsha Metallurgical Design Institute package designer. (Continued from page 34) in the actual production, using the vertical layout of the approach roads to the direction of this approach, there are technologies to solve the middle of a 3-wire fruit market lore filling layer of tadpole repeated backward recovery problem, so the pressure of 2000 Multi t mining high grade gold ore to be. Buzhi with vertical and horizontal mining approach solutions to a 1Om Zhongduan 0 stope east line of the Ministry of filling the road to take down the problem, and achieved a better teaching results. Received】 995-8-3 About Qupei Yuan, engineer, deputy manager of Zhejiang Province, scraping please cum Huangjin Gong,
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