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Wysłany: Pon 22:29, 04 Kwi 2011
Temat postu: MBTシューズ $
Heading face delay outburst
Volume to determine the course of the lithology, structure prediction front. (3) inform the relevant units of the predicted results,
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, good and effective conflict prevention measures. 4.1.2 touched by diffusion method Mocha Rock Hole (1) According to the see the rock drilling situation Mocha, found the top, the state coal thickening should be considered is one of these seven structures, should continue Mocha, combined with changes in the surrounding rock, the Department of Construction with the nature of the geological department to find out. (2) According to the drilling of gas changes during construction that structure. In the more stable the seam, thin seam, especially by thinning of thick coal seam, if the construction occurred during the gas discharge hole gauge, coal guns, nozzles, entry drills, drill cards and serious phenomenon, the roadway in front of or on both sides there must be a tectonic thickening or coal. (3) According to the anti-conflict situation Mocha indicators. 4.2 to take effective measures to prevent sudden discharge drilling and increase L5J4.2.1 encryption measures to protect against sudden range (1) shallow hole emission, hole depth deepened to 9 ~ 10m, 6 ~ 7m advance to ensure that the discharge hole of reduced by a 300mm hole spacing is 200mm. (2, the implementation of the external detection measures, the general coal road, in the roadway, and in the next four holes detected between the subject, when the discharge hole in the tunnel entry, bottom, left and right state when no rock be detected outside the discharge hole △ h2 values,
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, to prevent loss of control areas, when △ h2> 380Pa, should continue to drill additional peripherals. (3) shallow hole emissions after the implementation of these two measures are still large △ h2 at 380Pa, you must take or 2.2kw with 75 drill rig construction hole depth 20 ~ 30rn pressure relief holes 5 to 9, and always more than one hole ahead to ensure 10Ill distance. If the construction time in about two states must construct a state increase of 2 per m state protection hole, hole depth of not less than 8in. (4) when the discharge hole in the tunnel top, bottom, left and right states see rocks, but still greater than 380Pa △ h2 , that is not seen in normal roof and floor rock, there may be structural surface, you must wear a rock with 75 rig emissions other than the structural surface coal gas. 4.2.2 reduce the tunneling progress in the past the construction zone, in order to reduce the top time and the suspension of coal suspended exposed area exposed to ensure that the distance ahead, dig the implementation of the two in a row footage from the 1.5m class reduced to 0.75m, or run two rows of a dig, the following classes footage controlled 1.5m 4. .2-3 strengthen support 【. (1) take the lead in the discharge process, the state must take the lead construction Haotie column, posted the state must be close to the coal column wall, the mountain strong and take the lead with a flat solid wood back wall of coal. ( 2) take the lead after shooting must be taken ahead of the temporary support, then real roof, good control of the two states,
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, and win the provisional top sub, and the back wall of solid coal. (3) take the lead 101TI range of support must be strengthened,
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, with bilateral pomegranate tree and add two anchor legs in the studio, fixed shelf legs, items, the state must take back real fast, the mountain and powerful. (4) putting the use of bolting, if the bolt in the construction process,
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, see through roof coal, proved to be thrust fault structure, must immediately switch to frame roof support. 4.2.4 to reduce the operating process on the loose coal and vibration (1) Do not use picks operations; (2) prohibited the use of non-shooting way coal mining footage; (3) out of coal, support the process, putting the front or as little as possible damage to the surrounding coal. 4.2.5 Strengthening Protection (1) enhancing the training, so that workers are familiar harbinger of coal and gas outburst , refuge route and the use of self-help devices. (2) putting the two part-time designated driving prominent warning observers, prominent warning that the timely withdrawal of all personnel. (3) cleared tunnel escape route kept clear of disaster prevention line. 5 Conclusion Delay gas outburst is a very complex dynamic phenomenon, causing many prominent reason is, because of its often appear in the job process, very difficult to control and prevention, workers pose a great security threat. Therefore, we must prevent conflict theory, conflict prevention equipment, anti-conflict measures to be studied and put into practice, the control delay outburst, put an end to delay the occurrence of gas outburst accident injuries.
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