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When tunneling and mining coal surrounding rock displacement measurement


Black box did not set up to fight for the anchor tag roadway data. Set bolt hit the roadway, in the coal mining began, almost all of the roof displacement is unchanged, 20 ,knock off oakleys,-:-- 40m away from the face,mbt cipő, because ahead of ground pressure, leaving the displacement increases rapidly, but not play set anchor No6, close to 150,111 from the face around the time when displacement begins to increase. That is, set up to fight with no turns bolt face position (m) Figure 18 3 Appreciating the displacement of the roof panel (Roadway) than roadway, the roadway bolt set up to fight in very close to the coal face to achieve , no significant change in roof displacement, which 'shows the anchor effect. To compare the situation near the ground and roof displacement dynamics, as shown. 2o shows, as indicated by the tunneling and mining '. Shame the amount of 30 3s: s Perot 20l5 |. 1. 5O3 No. panel '∞ 300209100O location away from face (m> Figure 19 Appreciating the roof panel 3 position (longwall) coal demand caused by the roof displacement measured strain values ​​geologic column. In the middle of the geological map histogram, the left anchor set up to fight the roadway № 4. data, did not set up to fight for the right bolt № 1 and No6 data. № 1 for the roadway when, № 6, when the coal, № 4 for the two Both are sometimes the result of the distance away from the boring head № 1 and № 4 are the 350m, the distance from the coal face and No6 № 4 are generally as 0m. tunneling process did not set up to fight to remove the roof bit bolt roadway orifice near the outside,replica oakley sunglasses, almost no change, is generally believed that this is due to the site and down the East than the depth of 1 (90m) and shallow sandy directly shale roof is solid (2m away from the orifice depths of about 80% RQD ) due to addition, the bolt did not set up to fight the roadway, tunneling of holes loose,herve leger toronto, No. 3 Figure 20 Appreciating the roof panel and strain the relationship between the core sites for mining the relaxation will be extended to 6m depth, while the opposite , set anchor roadway was able to play well controlled, even in this scene, or the Central East 1 down, after a few In the coal face through the mined-out area is the state of suspended roadway roof, the roof is generally believed that even if displacement reached a large extent, due to the effect of the anchor to be maintained, indicating the effectiveness of its anchor from the center and down the East 1 West 3 Zone Appreciating the two bolt and set up to fight coal face not set up to fight displacement measurement taken when the bolt results, confirmed the effectiveness of anchor, however, bolt length and settings on the detailed design must be fully (the switch 38) · 27 · S Conclusion Table 1 CO sensor and odor sensor for the determination of the value of the comparison. ÷ 'From the above experimental results, the specimen temperature in the low temperature region (less than l0Q ℃), sensors sensitive to odor, overheating can be cook things and also anti-built house with the odor ..: co mass Stanford dance, Tridacna gigas gas react, made from the odor detection stage marriage, made or produced by the combustion phase of CO, in air flow to determine where a large fire early period of stage ,''{·~· very difficult. 35aA ~ o in the five kinds of odor sensors, 458AA sensitivity slow rate without major changes in exploration, therefore, from the five kinds of odor sensor element, the decision to choose 151AJ and 353AN. Zhang Huifeng trial (on the next page 27) to understand the surrounding roadway to the dynamic pressure, discontinuities such as the formation mechanism of the process of se, is caused in each other and bolt. thrown between ashamed, this is a matter for future discussion 。':'::: 4 Conclusion anchor for the investigation of coal mine roadway maintenance of the Pacific the effectiveness of multi-point displacement meter, in the three panels of coal mining tunnel, measured when the extraction of the play set play set anchor bolt and not the roadway displacement results are as follows (1) tunnel generally boring after deformation, with the tunneling length increases, the steady tendency, but then as close to the coal face and deformation again increases. * 38 * (2) The role of the ground pressure increases, the tunnel deformation , and most of the deformation resulting from the formation of discontinuities (caused by the stripping layer) and its expansion. (r3) ~ like that, do not anchor to control and prevent the formation of a continuous surface area of ​​the expansion of relaxation a role. (4) The play set anchor, tunneling process in general to control the deformation of 50%, and is very close to the coal face can control its deformation, confirmed the effectiveness of anchor. Zhang Huifeng trial ,',,,,,,,,,,,,,,',Beats By Dre Studio,, v ~~,,,
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