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منتدى الحياة الزوجية - ثقافة زوجية - الحياة الزوجية الثقافة الجنسية بالصور 2011 , ثقافة جنسية الثقافة الجنسية بالصور 2011 , ثقافة جنسية , عالم الحياة الزوجية , منتدى المتزوجين 2012 , صور , اوضاع



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قديم 10-05-2011, 10:20 AM   #1
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تاريخ التسجيل: 22 - 12 - 2010
المشاركات: 171
افتراضي abercrombie and fitch deutschland 8880 _3589 cemen

abercrombie and fitch deutschland 8880 _3589 cemen 2014


8880 Cement accelerator Rock loose circle were tested. And to study the rock loose circle of influence factors and the formation and development of the law, for the realization of quasi rock bolting and all mine roadway support provided the conditions of the bolt. Testing and research shows that: mine is a large loose circle surrounding rock, the loose ring; the coal buried deep, to pressure big, fast pressure release after the tunnel excavation, tunnel excavation in rock loose circle can be achieved in about lm . Therefore, pay special attention to the temporary support; loose circle surrounding rock by rock strength,Oakley juliet, stress and other factors, supporting the different ways of loose ring also affect the size of the early and timely support to improve the control of anchor for the surrounding rock very favorable; loose circle surrounding rock has a process of development, around 20d after the tunnel excavation rock stable, and its thickness also tend to loose circle setting; tunnel roof between two greater than the loose ring loose circle, indicating that stress mainly vertical pressure. (Li Jianfeng) Wing Wing Council to promote application of resin bolt Yongrong Mining Bureau in Chongqing application of new materials in underground tunneling resin bolt supporting more than 3 months, received a significant effect. And past use of the inverted wedge bolt compared to resin bolt has four characteristics: ① high efficiency, easy operation, anchor drilling and installation time reduced by nearly 2 / 3; ② anchor in a timely manner, the performance and reliability of the supporting the roof in time to prevent the roof separation and deformation and enhance the stability of the roof; ③ adaptable, soft rock and hard rock are adapted roof; ④ second support can be reduced, saving the cost of supporting materials, 30% to 50%. (CCB) Baodian mine bunker construction of large effect Yanzhou Mining (Group) Company Baodian coal mining area of ​​five coal storage section 2, height 59,8 m, using ladder network shotcrete combined support of new technology, only the actual duration to 30d, to achieve a high quality, fast, safe construction. Bunker construction, first ZFYD a 1500 drilling machine to drill a hole ≯ 1500mm refuse the slide, and then brush the top down Congress and the support. Large brush with ordinary drilling and blasting method, YT-24 pneumatic drill hole, smooth blasting. Permanent support using shotcrete ladder network, and the supporting cast reinforced concrete construction compared to shorten the duration of nearly 1.5 months,abercrombie and fitch deutschland, easing the Face of the mining area connecting the first tension; and save the cost of materials, each m material costs reduced by the 3,500 yuan 1,879 yuan. (Li Jianfeng) 8880 Cement accelerating agent accelerator from the Chaohu 8880 Plant development accelerator for the cement powder material, alkaline very small, on human non-toxic, non-corrosive, odorless, storage period of up to 6 months. 6% by weight of cement concrete mixed with others, the initial setting time of less than 3min, the final setting time is less than 7min; 1d compressive strength of up to 8MPa, 28d compressive strength ratio of 96% and 107%. Impermeability grade of up to $ 18. The average thickness of a sprayed layer of 100mm, an average spring rate can be controlled in 12.5% ​​less. Shotcrete operations, the dust concentration is less than 10mg / m, face visible is good. The product can be widely used in mine shaft engineering, underground, water and other underground construction shotcrete can be used for seepage and cement concrete emergency rescue work. (Built conditions) Frequency drilling machine according to {MiningMagazine} 2002 No. 4 reported that Atlas has introduced a new variable-frequency drive drilling machine,ed hardy tøj, to improve the anti-drilling productivity. This rig is by changing the frequency to control motor current pilot hole reaming drill bit and speed. This feature was first used earlier this year will be delivered to the Norian in northern Siberia, Russia's two Gaussian nickel Robbins 73RM-VF drilling machine design. Atlas since 1980, the company sold a total of 35 sets of drilling machine. Robbins 73RM drilling machine is the company's production of a medium-sized drilling machine, is currently very popular in the drilling machine, and its anti-drilled wells and shaft diameter 1.8 ~ 3.1m, has a variable Speed ​​control is by a hydraulic motor or DC motor drive and implementation. Completely new torque vector control AC drive has the advantage of higher efficiency, reliability and lower production costs. Reaming bit rate can change this feature is particularly beneficial from hard rock to soft rock, broken rock from the whole to changes in geological conditions such as the case of large operations. The main features of AC variable frequency drive is the drilling machine and drill machine over torque protection, a minimum current and low speed, using all the torque to achieve a smooth start and stop. The rig reaming speed 0 ~ 8r/min, pilot hole drilling speed of 0 ~ 30r/min; at constant power, reaming speed 8 ~ 16r/min, pilot hole drilling speed is 30 ~ 60r/min . As the speed increases, torque reduction. (Light Ning) 相关的主题文章: Oakley juliet 8880 _3589 cement accelerator Abercrombie France 450t h circulating fluidized b Abercrombie milano County of Hubei Housing charact

abercrombie and fitch deutschland 8880 _3589 cemen


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