综采6.2m采高工作面破碎顶板稳定性研究
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摘要
大采高开采技术是厚煤层开采工艺的主要发展方向,而顶板失稳是制约大采高开采的重要影响因素之一。破碎顶板在大采高开采条件下矿压显现强烈,更容易致使围岩裂隙发育,破坏了岩体的整体性,其失稳控制又是一个具有局部化特征的动态复杂系统,因此,大采高顶板稳定性研究不论是对现场安全生产,还是对大采高围岩控制理论的拓展都具有十分重要的意义。
本论文通过矿井地质调查、岩石力学实验、基于声发射的物理相似模拟及数值计算等多种科学方法与技术手段,对复杂开采条件下羊场湾煤矿6.2m采高工作面破碎顶板稳定性问题分析研究,并进行了现场工业性试验,保证大采高安全高效开采。
研究表明,破碎围岩在6.2m采高开采条件下引发的顶板破坏、变形和运移现象复杂,矿压显现强度和超前支承压力影响范围均有所增大,在应力升高区内,易引发煤壁片帮、顶板失稳。合理支护是采场顶板控制的首要任务,在顶板破碎和变形严重的区域增加支护密度,增强围岩的整体性,控制工作面顶板失稳,实现安全开采。
本研究的控制技术应用于羊场湾煤矿综采6.2m采高工作面顶板失稳控制过程中,取得了成功,为破碎顶板下大采高综采顶板稳定性控制研究提供了可靠的依据,同时具有一定的借鉴意义。
Great mining high technology is the main direction of development in thick coal seam mining technology.The roof destabilization is one of the important constraint factors in the mining of thick coal seam.Broken roof under the condition of great mining high shows strong behavior,resulting in fracture rock,damaging the integrity of rock mass,the instability control is a dynamic and complex system with the feature of localization.Therefore,study to the stability of the roof in great mining high,not only for the safety production,but also for the development of surrounding control theory in great mining high has great significance.
For the broken roof stability problem in the 6.2m work face under the complex condition in the Yang Changwan Coal Mine,this paper used some scientific methods and technology means,including the engineering geological survey,rock mechanics test,acoustic emission based on the physical simulation and numerical calculation,industrial test in coal field and so on,ensuring the safe and efficient of great mining high.
Research shows that the broken rock under the condition of mining with height 6.2m resulted in the complex phenomenan of roof damage,deformation and migration.rock burst intensity and the scope of abutment pressure has increased,in the region of stress increased,easily trigger coal wall and roof instability.Reasonable support is the primary task in roof control,increasing the density of support in the roof region of serious fragmentation and deformation,enhancing the integrity of rock,controling roof face instability.Finally,safty mining were achieved.
The technology had been successfully applied to the roof instability control in Yang Changwan Coal Mine 6.2m with fully mechanized mining workface.The research provides a reliable basis for control broken roof stability in fully mechanized mining with great mining height,At the same time,the control technology has a certain referent significance.
本论文通过矿井地质调查、岩石力学实验、基于声发射的物理相似模拟及数值计算等多种科学方法与技术手段,对复杂开采条件下羊场湾煤矿6.2m采高工作面破碎顶板稳定性问题分析研究,并进行了现场工业性试验,保证大采高安全高效开采。
研究表明,破碎围岩在6.2m采高开采条件下引发的顶板破坏、变形和运移现象复杂,矿压显现强度和超前支承压力影响范围均有所增大,在应力升高区内,易引发煤壁片帮、顶板失稳。合理支护是采场顶板控制的首要任务,在顶板破碎和变形严重的区域增加支护密度,增强围岩的整体性,控制工作面顶板失稳,实现安全开采。
本研究的控制技术应用于羊场湾煤矿综采6.2m采高工作面顶板失稳控制过程中,取得了成功,为破碎顶板下大采高综采顶板稳定性控制研究提供了可靠的依据,同时具有一定的借鉴意义。
Great mining high technology is the main direction of development in thick coal seam mining technology.The roof destabilization is one of the important constraint factors in the mining of thick coal seam.Broken roof under the condition of great mining high shows strong behavior,resulting in fracture rock,damaging the integrity of rock mass,the instability control is a dynamic and complex system with the feature of localization.Therefore,study to the stability of the roof in great mining high,not only for the safety production,but also for the development of surrounding control theory in great mining high has great significance.
For the broken roof stability problem in the 6.2m work face under the complex condition in the Yang Changwan Coal Mine,this paper used some scientific methods and technology means,including the engineering geological survey,rock mechanics test,acoustic emission based on the physical simulation and numerical calculation,industrial test in coal field and so on,ensuring the safe and efficient of great mining high.
Research shows that the broken rock under the condition of mining with height 6.2m resulted in the complex phenomenan of roof damage,deformation and migration.rock burst intensity and the scope of abutment pressure has increased,in the region of stress increased,easily trigger coal wall and roof instability.Reasonable support is the primary task in roof control,increasing the density of support in the roof region of serious fragmentation and deformation,enhancing the integrity of rock,controling roof face instability.Finally,safty mining were achieved.
The technology had been successfully applied to the roof instability control in Yang Changwan Coal Mine 6.2m with fully mechanized mining workface.The research provides a reliable basis for control broken roof stability in fully mechanized mining with great mining height,At the same time,the control technology has a certain referent significance.
引文
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[2]宋振骐.实用矿山压力控制[M].徐州:中国矿业大学出版社,1988.
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[35]郝海金,吴健,张勇,等..大采高开采上位岩层平衡结构及其对采场矿压显现的影响.煤炭学报,2004,29(2):137~141.
[36]郝海金,张勇,陆明心.缓倾斜厚煤层大采高开采工作面矿压研究.煤炭学报,2002,12(2):11~13.
[37]弓培林,靳钟铭.影响大采高综采支架稳定性的试验研究.太原理工大学学报,2001, 32(2):666~668.
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[2]宋振骐.实用矿山压力控制[M].徐州:中国矿业大学出版社,1988.
[3]弓培林.大采高采场围岩控制理论及应用研究.[博士学位论文].太原:太原理工学, 2006.
[4]大倾角复杂特厚易燃煤层6.2m大采高开采集成技术研究.[研究报告].银川:神华宁夏煤业集团有限责任公司,西安:西安科技大学,2008,12.
[5]刘涛.厚煤层大采高综采技术现状.煤炭工程,2002(2):4~8.
[6]郭宝华,涂敏.浅谈我国大采高综采技术.中国矿业,2003,12(10):40~42.
[7]武建国.大采高综采工作面与巷道围岩控制技术研究[硕士学位论文].太原:太原理工大学,2004.
[8]夏均民.大采高综采围岩控制与支架适应型研究[硕士学位论文].济南:山东科技大学,2004.
[9]胡国伟.大采高综采工作面矿压显现特征及控制研究[硕士学位论文].太原:太原理工大学,2006.
[10]何富连,钱鸣高.高产高效大采高综采技术的研究与实践.阜新矿业学院学报(自然科学版),1997,16(1):5~7.
[11]赵怀祥,陈俊成.大采高开采技术研究.山东煤炭科技,1998(4):24~27.
[12]Oyler,DavidC,Mark,Christopher,Dolinar,Dennis.R,etc.A study of the ground control effects of mining longwall faces into open or backfilled entries.Geotechnical and Geol- -ogical Engineering,2001,19(2):137~168.
[13]蔡美峰,何满潮,刘东燕.岩石力学与工程.北京:科学出版社,2002.
[14]Shutov.A,V.Krasnovskii,A.A.Mirenkov,V.E.Modeling of Contact Conditions under Deformation of Rock Samples.Journal of Mining Science,2004,40(2):134~141.
[15]Liu S Y,Qian M G.Stability and Control of Immediate Roof of Fully Mechanized Coal Face[J].9th International Conference on Ground Control in Mining,Morgantown:the University of West Virgina,1990:123~127.
[16]史红,姜福兴.采场上覆岩层结构理论及其新进展.山东科技大学学报(自然科学版).2005,24(1):21~25.
[17]Holla L,Buizen M.Strata Movement due to Shallow Longwall Mining and the Effect on Ground Permeability[J].Aus.Imm Bulletin and Proceedings,1990,295(1).
[18]Henson H J,Sexton J L.Primary study of Shallow Coal Seams Using High Resolutionseismic Reflecti on Methods[J].Geophysics,1991,56(9).
[19]Bordrac B B.Rock Pressure Features of Moscow Suburb Coal field[J].Coal,1998(2).
[20]钱鸣高,李鸿昌.采场上覆岩层活动规律及其对矿山压力的影响.煤炭学报,1982 (2):1~12.
[21]Qian Minggao.A study of the behaviour of overlying strata in longwall mining and its application to strata control[M].Strata Mechanics,Elsevier Scientific Publishing Company,1982:13~17.
[22]钱鸣高,刘听成.矿山压力及其控制(修订本).北京:煤炭工业出版社,1992.
[23]Qian M G,He F L.The behaciour of the main roof in longwall minging:Weighting Span,fracture and disturbance[J].Jof Mine,Metals&Fuels,1989:240~246.
[24]Qian M G,He F L,Zhu D R.Monitoring indices for the support and surrounding strata on a longwall face[C].The 11th International Conference on Ground Control in Mining,The University of Wollongong,1992:25~262.
[25]钱鸣高,缪协兴,何富联.采场“砌体梁”结构的关键块分析[J].煤炭学报,1994,19(6): 557~563.
[26]Qian M G,He F L,Miao X X.The system of strata control around longwall face in China[J].In:Guo Yuguang,Tad S Golosinski,eds.Mining Science and Technology, Rotterdam:A A Balkema,1996:15~18.
[27]张保春.大采高综采工作面实现安全高效开采的技术应用研究.安徽建筑工业学院学报(自然科学版),2007,15(4):70~73.
[28]宋扬,宋振骐.采场支承压力显现规律与上覆岩层的运动关系.煤炭学报, 1984(1):47~55.
[29]石平五.试论一些矿压问题的能量原理.第二届煤矿采场矿压理论与实践讨论会征文选编.徐州:煤炭工业部矿山压力科技情报中心站,1984.
[30]靳钟铭,徐林生.煤矿坚硬顶板控制[M].北京:煤炭工业出版社,1994.
[31]贾喜荣.矿山岩层力学[M].北京:煤炭工业出版社,1997.
[32]ю.в.格罗莫夫,ю.н.贝奇科夫著,赵宏珠等译.缓倾斜厚煤层开采矿山压力控制[M].徐州:中国矿业大学出版社,1990:73~81.
[33]赵宏珠.特大采高液压支架发展与研究.采矿安全与工程学报,2007 24(3):265~269.
[34]赵宏珠,蒋哲明,李广申,编著.缓倾斜厚煤层整层垮落开采设备及工艺.煤炭工业出版社,1991(1):127~304.
[35]郝海金,吴健,张勇,等..大采高开采上位岩层平衡结构及其对采场矿压显现的影响.煤炭学报,2004,29(2):137~141.
[36]郝海金,张勇,陆明心.缓倾斜厚煤层大采高开采工作面矿压研究.煤炭学报,2002,12(2):11~13.
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