Modeling and simulation of strata movement for protective seam mining with large interburden |
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Authors: | Chang-sheng Song De-hai Li Hua-min Li |
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Affiliation: | (1) School of Energy and Science Engineering, Henan Polytechnic University, Jiaozuo, 454000, China;(2) Henan Education Department Engineering & Technology Research Center for Coal and Gas Safety Mining, Jiaozuo, 454000, China |
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Abstract: | Based on simulated material scale modeling and numerical simulation, the protective seam mining method was conducted at one
coal mine. After extracting the No.15 seam, the overlying strata movement and the deformation of the No.9–10 protected seam
were studied. The experiment results show that it is feasible to destress the protected seams with large interburden thickness.
When the face had advanced 200 m from the setup room, the No.9–10 seam was fully destressed, resulting in easy gas drainage
in the destressed zone. Recommendations on mining sequence of multiple seams mining in the same coal areas were made.
Supported by Ministry of Education Doctoral Foundation (20070460001) and Natural Science Foundation of Henan Province (0623021400) |
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Keywords: | large interburden protective seam mining strata movement destressed |
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