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Study. movement characteristics, "re-stabilization" conditions. overlying key stratum structure after losing stability

Nan Li

Abstract


Engineering practices, phenomenon, step subsidence. roof caused.Sliding destabilisation. key stratum structures without support crushing frequently exists. hence a mechanical model. key stratum structure after sliding instability. established, movement characteristics, "re-stabilization" conditions. key stratum structure after losing stability. An-alyzed. .: Show, roof subsidence caused. instability. key stratum structure may not always exceed. threshold, crushes supports. alternatively, unstable block. key stratum may stop sliding. stability. rotation squeezing or touching. falling rocks be-fore crushing. support. two "re-stabilization" conditions. revealed. under certain conditions maintaining rational mining height within support capability or increasing support resistance. make. unstaBle block. rotation squeezing stability. put forward so as. prevent crushing. support.


Keywords


Key stratum;Sliding instability;Re-stabilization;Support crushing;Unstable Block

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References


Qian ming gao Samuel Hip Hing what fu lian. stope "masonry beam" structure of Key Block Analysis[J]. Coal Journal,199419 (6):557-563.QIAN minggaoMIAO xiexingHE fulian.Analysis. Key Block. structure. voussoir beam. longwall mining [J].Journal. Coal Society199419 (6):557-563.

Qian ming gao. stope overlying rock of Balance Conditions[J]. Journal of China University of Mining & Technology,198110 (2):31-40.

Qian ming gao bed establishs Li Liang and. masonry beam of"S-R"Stability and Its Application[J]. Mine Pressure and roof management,199421 (3):6-11.QIAN minggaoZHANG DingliLI liangjieEt al."S-R"Stability. voussoir beam, its application [J].Mine Pressure, Roof Management199421 (3):6-11.

Samuel Hip Hing qian ming gao. stope Surrounding Rock overall structure and masonry beam mechanical model[J]. Mine Pressure and roof management,199522 (3/4):3-12.MIAO xiexingQIAN minggao.Solid structure, model. voussoir beam. face of "surveillance rock [J].Mine Pressure, Roof Management199522 (3/4):3-12.

Cao wins root. stope Surrounding Rock overall Mechanical Model and Application Research[J]. Rock Mechanical and engineering Journal,199918 (6):721-721.

Cao wins root qian ming gao Liu Changyou and. of support-Surrounding Rock relationship New Study[J]. Coal Journal,199823 (6):575-579.

Xu Jia forest Zhu guards bowed Golden Peak and. Stope Large Area pressure frame roof fall Accident Prevention and Control Technology Research[J]. Coal Science Technology,201543 (6):1-8.

Cao wins root ginger Navy King Fuhai and. stope overlying hard rock breaking of Numerical Simulation Research[J]. Mining and Security Engineering Journal,201330 (2):205-210.

Xu Jia forest Zhu guards bowed Golden Peak. Shallow Coal Seam Mining Pressure Frame Type[J]. Coal Journal,201439 (8):1625-1634.

Lin Qing. Qidong Coal Mine7/130Fully Mechanized Mining surface of the Pressure Water Inrush Reason Analysis[J]., China Coal,201238 (12):44-47.

Xu Jia forest Zhu guards WANG Xiao vibration. Loose pressure aquifer under coal mining Water Inrush Mechanism and Prevention and Control Research[J]. Mining and Security Engineering Journal,201128 (3):333-339.

Rowan. Shallow Large Mining Height Fully Mechanized Mining Working face the end of Mining Pressure frame roof fall Processing Technology

Wang Zhigang Lee access qeneral and Chief Analyst and. Large Mining Height Working Face. stone area pressure frame Reason Research[J]. Coal and chemical,201437 (3):86-88.WANG ZhigangLI tongdaLI ShijunEt al.Study.

Yin Hebrew. Large Mining Height Fully Mechanized Mining Working Face Pressure frame Reason Analysis and Prevention and Control Countermeasures [J]. Coal Science Technology,201442 (7):26-29.

Hao Constitution Jay Xu Jia forest Zhu guards and. High pressure loose aquifer the lower support of the reasonable work resistance of determine[J]. Journal of mining and safety engineering, 2010,27 (3):416-420.

Wu Fengfeng, Yang jingxuan, Yu Bin, et al.. Determination of Roof Caving height of thick and extra thick coal seam working face[J]. Journal of China University of Mining and technology,2014,43 (5):765-772.




DOI: http://dx.doi.org/10.18686/gmr.v1i1.1216

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