| The method of ascending is in the coal seam, which contain two layers above and certain space and have some mine worth, first mine the lower coal seam and then mine the top. For this mine method is few applied in fact, and lack theory study in this method at present. But like the dried up Muchengjian mine, it is realistic meaning and application value to raise mine's turnout and prolong serving year for3# coal in especial instance, and it is necessity to study.Muchengjian come into existence in 1952, It's coal resources has already get close to dried up, although always scoop out potential to produce in the last few years, but the raw coal of year produce from more than 2800,000 tons for high peak to get down The resources is dried up, mines difficulty enlargement, production cost exaltation, First already abondone the3# coal seam of 1.2meters have been decided to mine in 2006,guarantee the increase of coal mine turnout.The paper aim at the fact of mining3# coal seam in Muchengjian. At the base of underground exploration, surrounding strata physics mechanics parameter analysis, the theories analysis, number simulation, carry strata control observation and strata control analysis in 3# coal seam and forecast the ground behaviour. Studied the feasibility of mine 3# coal seam on the2# coal seam, expound that the main technology facts of influence ascending mining in coal seams are the distances between coal seams and the relations between time and space of mining moving, and the application conditions of ascending mining in coal seams are introduced. Demonstrated some problem 3# coal seams foot wall by foundering theory, provide the reference gist and developed the new path for the similarity ascending mining problem.So, this ascending mining attempt, not only enriched the theory and practice of ascending mining, but also have important practice value and realistic meanings to expand main work and increase the extraction ratio for little coal storage Muchengjian. |
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