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Theoretical analysis of support stability in large dip angle coal seam mined with fully-mechanized top coal caving

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Support stability is critical to ensure fully-mechanized top coal caving of large dip angle coal seam. To obtain the relations between each factor and hydraulic support stability, the mechanic model of large dip angle coal seam along face dip and strike was built to analyze support stability, including antitoppling, anti-slip, and anti-rotation of supports. The result indicates: Along the face dip, the suport stability was negatively correlated with dip angle; Higher top caving means lower anti-rotation at suport tail; With initial support force and working resistance of supports enhanced, the anti-slip, and antirotation stability of supports can be risen significantly. Along the strike, the critical toppling angle was proportional to dip angle, mining height, support weight, support width and support force; The critica slip angle was positive correlation with support force, friction coefficient of roof and supports. According to the results of both mechanical analysis and engineering projects, support stability in large dip angle can be risen efficiently and supports slipping, toppling and rotation can be avoided by selecting proper technical methods and equipment, like enhancing initial support force appropriately.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
73--87
Opis fizyczny
Bibliogr. 34 poz., rys.
Twórcy
autor
  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology Beijing), Ministry of Education, Beijing 100083, China
  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology Beijing), Ministry of Education, Beijing 100083, China
autor
  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology Beijing), Ministry of Education, Beijing 100083, China
  • Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China
  • State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University), Jiaozuo 454000, China
  • Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines (Hunan University of Science and Technology), Xiangtan 411201, China
autor
  • Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China
autor
  • State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology Beijing), Ministry of Education, Beijing 100083, China
Bibliografia
  • BUZILO V., SERDYUK V., YAVORSKY A., 2010, A research of influence of support resistance of the stope in the immediate roof condition, New Techniques and Technologies in Mining-Proceedings of the School of Underground Mining, 127–130.
  • FANG J., 2018, Research on roof breaking characteristics and law of mine pressure in steep bow pseudo-inclined seam, Chongqing University, Chongqing [Dissertation].
  • FANG Z.Z., 2018, Up and down moving mechanism and control of false-inclined mining equipment with large mining height, Coal Mining Technology, 23 (6), 36–43.
  • HUANG Z.Z., REN Y.F., ZHANG H.J., 2010, Study on key technology of fully mechanized top coal caving in extra-thick soft coal seam with great dip angle, Journal of China Coal Society, 35 (11), 1878–1882.
  • LAI X.P., CAI M.F., REN F.H. et al., 2015, Study on dynamic disaster in steeply deep rock mass condition in Urumchi coalfield, Shock and Vibration, 10 (2), 26–35.
  • LI X., WANG Z., ZHANG J., 2017, Stability of roof structure and its control in steeply inclined coal seams, International Journal of Mining Science and Technology, 27 (2), 359–364.
  • LIANG H.R., 2019, Analysis of stability factors of support in steep upward mining medium-thick coal seam, China Mine Engineering, 48 (4), 55–59.
  • LIU C.Q., 2014, The movement law of the roof rock and the stability of the support in the big dip thick coal seam large mining height working face in Quandian Coal Mine, China University of Mining andTechnology, Xuzhou [Dissertation].
  • LIU C.Y., YANG J. X. et al., 2014, Destabilization regularity of hard thick roof group under the multigob, Journal of China Coal Society, 39 (3), 395–403.
  • LIU Z.M., CHEN Z.H., XIE J.W. et al., 2014, Stability analysis and control measures of powered supports in greater inclined full-mechanized coal seam, Journal of China Coal Society, 29 (3), 264–268.
  • MA F.H., SUN L., LI D., 2011, Numerical simulation analysis of covering rock strata as mining steepinclined coal seam under fault movement, Transactions of Nonferrous Metals Society of China, 21, 556–561.
  • MA L.Q. et al., 2015, Support stability mechanism in a coal face with large angles in both strike and dip, Journal of the Southern African Institute of Mining and Metallurgy, 115 (7), 599–606.
  • QIAN M.G., 2010, Ground pressure and strata control, China University of Mining and Technology, Xuzhou.
  • RAFAEL R.D., JAVIER T.A., 2000, Hypothesis of the multiple subsidence trough related to very steep and vertical coal seams and its prediction through profile functions, Geotechnical and Geological Engineering, 18 (4), 289–311.
  • HU S.X., MA L.Q., GUO J.S. et al., 2018, Support-surrounding rock relationship and top-coal movement laws in large dip angle fully-mechanized caving face, International Journal of Mining Science and Technology, 28 (3), 533–539.
  • SHI F.T., JIN R.Q., 2019, Solution of steeply inclined fully mechanized caving face and complete instability of rock, Coal Technology, 38 (4), 110–115.
  • TU H.S., TU S.H., CHEN F., 2014, Study on the deformation and fracture feature of steep inclined coal seam roof based on the theory of thin plates, Journal Mining and Safety, 31 (1), 49–54.
  • WANG G.F., PANG Y.H., 2015, Relationship between hydraulic supports and surrounding rock coupling and its application, Journal of China Coal Society, 140 (1), 30–34.
  • WANG N.B., ZHANG N., 2013, Characteristics of stope migration and roadway surrounding rock fracture for fully-mechanized top-coal caving face in steeply dipping and extra-thick coal seam, Journal of China Coal Society, 8, 1312–1318.
  • WANG S.W., WANG F.M., 2104, CBM development well type for steep seam in Fukang Baiyanghe mining area, Journal of China Coal Society, 9, 1914–1918.
  • WANG Z.Y., 2019, Mechanism of clamping rockburst in horizontal section mining of steeply inclined extra-thick coal seam, China University of Mining and Technology, Xuzhou [Dissertation].
  • WU F.F., LIU C.Y., LI J.W., 2014, Combination hydraulic support stability of working face in large inclined and “three-soft” thick seam, Journal of Mining and Safety Engineering, 31 (5), 721–725, 732.
  • WU Y.Q., 2018, Study on the floor movement law of large inclined and height working face, Xi’an University of Science and Technology, Xi’an [Dissertation].
  • WU Y.P., LANG D., et al., 2018, Regional fracture of top-coal along the inclined direction of fully-mechanized caving face in soft steep dipping seam, Journal of Mining and Safety Engineering, 35 (3), 553–561.
  • WU Y.P., LIU K.Z, YUN D.F. et al., 2014, Research progress on the safe and efficient mining technology of steeply dipping seam, Journal China Coal Society, 39 (8), 1611–1618.
  • WU Y.P., 2006, Keys to dynamic equations of system R-S-F and determination on working resistance of face support in steeply dipping seam mining, Journal of China Coal Society, 31 (6), 736–741.
  • XIE P.S., WU Y.P., WANG H.W. et al., 2010, Stability analysis of incline masonry structure and suport around longwall mining face area in steeply dipping seam, Journal of China Coal Society, 37 (8), 1275–1280.
  • YIN G.Z., LI X.S., GUO W.B., 2010, Photo-elastic experimental and field measurement study of ground pressure of surrounding rock of large dip angle working coalface, China Journal Rock Mech. Engineering, 29 (3), 3336–3343.
  • YU J.H., 2013, Research of steep seam backfill mining methods and its mechanism of surrounding rock movement, China University of Mining and Technology, Beijing [Dissertation].
  • YUAN Y., TU S.H., WANG F.T. et al., 2015, Hydraulic support instability mechanism and its control in a fully-mechanized steep coal seam working face with large mining height, Journal of Southern African Institute of Mining and Metallurgy, 115 (5), 441–447.
  • YUAN Y., TU S.H., DOU F.J. et al., 2008, Support instability mechanism of fully mechanized top coal caving face with steep coal seams and its control, Journal of Mining and Safety Engineering, 25 (4), 430–434.
  • ZHANG D.S., WU X., ZHANG W. et al., 2013, Stability analysis on support in large inclined coalface during special mining period, Journal of Mining and Safety Engineering, 30 (3), 331–336.
  • ZHANG Z.Y., 2011, Dynamic analysis on stability of hydraulic powered support in deep inclined fully mechanized wall and prevention slips measures, Journal of China Coal Society, 30 (7), 705–709.
  • ZHAO K., 2019, Study on stability and control technology of large dip angle mining support in thick coal seam with large mining height, Coal and Chemical Industry, 42 (1), 43–49.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-61ae5e3b-c166-4ecf-8a13-b4c5b783534e
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