采动条件下底板应力场及变形破坏特征的研究
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摘要
本文研究了煤层底板岩体在采动条件下的应力场及变形破坏特征,为探讨煤层底板突水机理奠定了一定的理论基础。论文采用理论分析与数值计算模拟分析相结合的研究方式,首先根据弹塑性理论求解了底板岩体在采动条件下的应力场及最大破坏深度;进而采用FLAC3D进行数值模拟,对采场煤层底板的应力状态及岩层运动规律进行分析,获得了一些规律性认识。其次,分析了底板节理岩体的破坏形式及强度影响因素,采用遍节点模型对含有一定夹角的两个弱面的岩样进行模拟分析,得出了一些结论。再次,分析了地下水对岩体的影响、固液耦合模式的理论和数值计算方法,进而模拟研究分析了固液耦合与非固液耦合之间的差别及在固液耦合模式下水压变化对节理岩体中应力场的影响,得到了一些认识。最后,结合刘桥一矿的水文地质和采矿条件进行了工程分析。
本文研究表明,运用理论分析与数值模拟方法,可以全面地揭示采动条件下底板岩体的应力场、变形破坏特征与破坏范围、深度,有利于选择、优化设计方案,同时减少试验时间、节省项目经费,提高矿井的经济效益与社会效益。
The paper researched the stress fields and the deformation and breakage characters of rock mass in coal seam floor under the condition of mining, which is in order to establish definite theory base to discuss inrushing water mechanism in coal seam floor. The paper adopted associative research method between theory analysis and numerical simulation analysis. At first, based on elastic and plastic theory, the stress fields and most destroying depth are divided, which are in coal seam floor under the condition of mining; in succession, which are simulated by FLAC3D, and some rule knowledge are arrived by analyzing stress states and terrane moving rules in coal seam floor. Second, the paper analyzed destroying models and factors affecting strength of joint rock mass in coal seam floor, adopted ubiquitous-joint model to simulate and analyze rock sample including two interfaces which stands some kinds of angles between them, and arrived some conclusions. Again, the paper analyzed the effect that ground water affects rock mass, the theory of solid and fluid coupling model and the simulation calculating method, simulated and analyzed the difference between solid and fluid coupling mode and solid and fluid non-coupling mode, and the effect that the change of water power affects stress field of joint rock mass under the condition of solid and fluid coupling mode, and then arrived some knowledge. At last, combined with the hydrology geological and mining conditions of LiuQiao No.1 coal mine, the engineering is analyzed.Some conclusions are made clear through the paper. Using the theory analysis and numerical simulation method can open out the stress fields, deformation and destroying characters, and destroying range and depth of rock mass in coal seam floor under the condition of mining, which is propitious to select and optimize design projects, reduce the testing time and economize the project outlays, and then improve the economy benefit and society benefit.
本文研究表明,运用理论分析与数值模拟方法,可以全面地揭示采动条件下底板岩体的应力场、变形破坏特征与破坏范围、深度,有利于选择、优化设计方案,同时减少试验时间、节省项目经费,提高矿井的经济效益与社会效益。
The paper researched the stress fields and the deformation and breakage characters of rock mass in coal seam floor under the condition of mining, which is in order to establish definite theory base to discuss inrushing water mechanism in coal seam floor. The paper adopted associative research method between theory analysis and numerical simulation analysis. At first, based on elastic and plastic theory, the stress fields and most destroying depth are divided, which are in coal seam floor under the condition of mining; in succession, which are simulated by FLAC3D, and some rule knowledge are arrived by analyzing stress states and terrane moving rules in coal seam floor. Second, the paper analyzed destroying models and factors affecting strength of joint rock mass in coal seam floor, adopted ubiquitous-joint model to simulate and analyze rock sample including two interfaces which stands some kinds of angles between them, and arrived some conclusions. Again, the paper analyzed the effect that ground water affects rock mass, the theory of solid and fluid coupling model and the simulation calculating method, simulated and analyzed the difference between solid and fluid coupling mode and solid and fluid non-coupling mode, and the effect that the change of water power affects stress field of joint rock mass under the condition of solid and fluid coupling mode, and then arrived some knowledge. At last, combined with the hydrology geological and mining conditions of LiuQiao No.1 coal mine, the engineering is analyzed.Some conclusions are made clear through the paper. Using the theory analysis and numerical simulation method can open out the stress fields, deformation and destroying characters, and destroying range and depth of rock mass in coal seam floor under the condition of mining, which is propitious to select and optimize design projects, reduce the testing time and economize the project outlays, and then improve the economy benefit and society benefit.
引文
1.张金才.张玉卓.刘天泉,岩体渗流与煤层底板突水[M],地质出版社,1997.8
2. FLAC3D(Fast Lagrangian Analysis of Continua in 3 Dimensions), Version 2.0, User manual, USA: Itasca Consulting Group, Inc. 1997.
3.许学汉.王杰等著,煤矿突水预报研究[M],地质出版社,1988
4.李贺,岩石断裂力学[M],重庆大学出版社,1988.8
5.王玉芹.刘成林,底板岩层阻水能力评价[J],山东煤炭科技,2000(2)
6.张文泉等,煤层底板岩层阻水性能与其结构成分及组合形式的关系[J],煤田地质与勘探,1992(4)
7.肖洪天.张文泉等,煤层底板裂隙网络的生成[J],山东矿业学院院报,1997(1)
8.李加祥等,煤层底板岩体在厚煤层重复采动条件下的破坏规律,[J]矿井地质,1992(1)
9.张文泉.刘伟韬.王振安,煤矿底板突水灾害地下三维空间分布特征[J],中国地质灾害与防治学报,1997.3(1)
10.张文泉.刘伟韬.张红日,煤层底板岩层阻水能力及其影响因素研究[J],岩土力学,1998.12(4)
11.李家祥.李大普.张文泉,原始地应力与煤层底板突水的关系[J],岩土力学与工程学报,1999.8(4)
12.杨栋.赵阳升,裂隙状采场底板固流耦合作用的数值模拟[J],煤炭学报,1998.2
13.王经明,承压水沿煤层底板递进导升突水机理的模拟与观测[J],岩土工程学报,1999.9
14.高延法.施龙清.娄华君.牛学良,底板突水规律与突水优势面,1999.6
15.薛禹群,地下水动力学[M],地质出版社,1997.9
16.中国地震局地壳应力研究所.日本电力中央研究所,水压致裂裂缝的形成和扩展研究,地震出版社,1999.1
17.仵彦卿.柴军瑞,裂隙网络岩体三维渗流场与应力场耦合分析[J],西安理工大学学报,2000.1
18.陈平.张有天,裂隙岩体渗流与应力耦合分析[J],岩石力学与工程学报,1994.3
19.孔园波,华安增,裂隙岩石破裂机理研究[J],煤炭学报,1995.2
20.原山东矿业学院.开滦矿务局.开滦赵各庄矿,改革采煤方法和开采工艺预防突水灾害的研究,1991
21.李白英.弥伤震,采矿工程水文地质(上.下),山东矿业学院,1988.11
22.李白英等,受奥灰承压水威胁煤层采场底板变形破坏规律研究[J],煤炭学报,1992(2)
23.李白英,预防矿井底板突水的“下三带”理论及其发展与应用[J],山东矿业学院院报,1999.12
24.姜福兴,试论采场覆岩结构的系统模型,2000年
25.李加祥,通过测量底板最大附加应力探求底板突水机理,煤田地质与勘探,1988(4)
26.高航.孙振鹏,煤层底板采动影响的研究[J],山东矿业学院学报,1987(2)
27.刘天泉等,煤矿地表移动与覆岩破坏规律及其应用[M],煤炭工业出版社,1981
28.王作宇等,煤层底板承压水上采煤突水机制的两个基本理论与实践,《全国矿井水文工程地质学术交流会论文集》,地震出版社,p103-106
29.杨米家 陈国锋 贺永年,采动破裂岩体等效三维张量的估计及其注浆渗透规律初探[J],淮南矿业学院学报,Vol.17,No.3,1997,p16-21
30.王媛.速宝玉.徐志英,裂隙岩体渗流模型综述[J],水科学进展,Vol.7,No3,1996,p276-282
31.毕贤顺.王晋平,矿井底板突水的数值模拟[J],淮南矿业学院学报,Vol.17,No.1,1997,p12-16
32.周创兵.熊文林,论岩体的渗透性[J],工程地质学报,Vol.14,No2,1996,p69-74
33.杨米加.陈国锋,采动破裂岩体等效三维渗透张量的估计[J],山西煤炭,Vol.17,No.3,1997,p25-27
34.赵坚,岩石节理吻合系数及其对节理特性的影响[J],岩石力学与工程学报,16(6),1997,p514-521
35. Perry, K. E., Jr and Mckelvie, J., Measurement of Energy Release Rates for Delimitations in Compsite Materials[J], Experimental Mech. Vol. 36, No. 1, p55-63, 1996
36. Chen, J. -T and Wang, W -C, Experimental Analysis of An Arbityarity inclined Semi-infinite Crack Terminated at the Bimaterial Interface [J], Experimental Mech. Vol. 36, No. 1, p7-16, 1996
37. Olivit, R. S. and Surace, L., The Damage Assessment of Concrete Structures by Time-frequency Distribution[J], Experimental Mech. 1997, Vol. 37, No. 3, p355-359
38.魏久传,煤层底板岩体断裂损伤与底板突水机理研究[D],博士学位论文,山东科技大学,2000
39.谭学术.鲜学福.郑道访等,复合岩体力学理论及其应用[M],煤炭工业出版社,1994
2. FLAC3D(Fast Lagrangian Analysis of Continua in 3 Dimensions), Version 2.0, User manual, USA: Itasca Consulting Group, Inc. 1997.
3.许学汉.王杰等著,煤矿突水预报研究[M],地质出版社,1988
4.李贺,岩石断裂力学[M],重庆大学出版社,1988.8
5.王玉芹.刘成林,底板岩层阻水能力评价[J],山东煤炭科技,2000(2)
6.张文泉等,煤层底板岩层阻水性能与其结构成分及组合形式的关系[J],煤田地质与勘探,1992(4)
7.肖洪天.张文泉等,煤层底板裂隙网络的生成[J],山东矿业学院院报,1997(1)
8.李加祥等,煤层底板岩体在厚煤层重复采动条件下的破坏规律,[J]矿井地质,1992(1)
9.张文泉.刘伟韬.王振安,煤矿底板突水灾害地下三维空间分布特征[J],中国地质灾害与防治学报,1997.3(1)
10.张文泉.刘伟韬.张红日,煤层底板岩层阻水能力及其影响因素研究[J],岩土力学,1998.12(4)
11.李家祥.李大普.张文泉,原始地应力与煤层底板突水的关系[J],岩土力学与工程学报,1999.8(4)
12.杨栋.赵阳升,裂隙状采场底板固流耦合作用的数值模拟[J],煤炭学报,1998.2
13.王经明,承压水沿煤层底板递进导升突水机理的模拟与观测[J],岩土工程学报,1999.9
14.高延法.施龙清.娄华君.牛学良,底板突水规律与突水优势面,1999.6
15.薛禹群,地下水动力学[M],地质出版社,1997.9
16.中国地震局地壳应力研究所.日本电力中央研究所,水压致裂裂缝的形成和扩展研究,地震出版社,1999.1
17.仵彦卿.柴军瑞,裂隙网络岩体三维渗流场与应力场耦合分析[J],西安理工大学学报,2000.1
18.陈平.张有天,裂隙岩体渗流与应力耦合分析[J],岩石力学与工程学报,1994.3
19.孔园波,华安增,裂隙岩石破裂机理研究[J],煤炭学报,1995.2
20.原山东矿业学院.开滦矿务局.开滦赵各庄矿,改革采煤方法和开采工艺预防突水灾害的研究,1991
21.李白英.弥伤震,采矿工程水文地质(上.下),山东矿业学院,1988.11
22.李白英等,受奥灰承压水威胁煤层采场底板变形破坏规律研究[J],煤炭学报,1992(2)
23.李白英,预防矿井底板突水的“下三带”理论及其发展与应用[J],山东矿业学院院报,1999.12
24.姜福兴,试论采场覆岩结构的系统模型,2000年
25.李加祥,通过测量底板最大附加应力探求底板突水机理,煤田地质与勘探,1988(4)
26.高航.孙振鹏,煤层底板采动影响的研究[J],山东矿业学院学报,1987(2)
27.刘天泉等,煤矿地表移动与覆岩破坏规律及其应用[M],煤炭工业出版社,1981
28.王作宇等,煤层底板承压水上采煤突水机制的两个基本理论与实践,《全国矿井水文工程地质学术交流会论文集》,地震出版社,p103-106
29.杨米家 陈国锋 贺永年,采动破裂岩体等效三维张量的估计及其注浆渗透规律初探[J],淮南矿业学院学报,Vol.17,No.3,1997,p16-21
30.王媛.速宝玉.徐志英,裂隙岩体渗流模型综述[J],水科学进展,Vol.7,No3,1996,p276-282
31.毕贤顺.王晋平,矿井底板突水的数值模拟[J],淮南矿业学院学报,Vol.17,No.1,1997,p12-16
32.周创兵.熊文林,论岩体的渗透性[J],工程地质学报,Vol.14,No2,1996,p69-74
33.杨米加.陈国锋,采动破裂岩体等效三维渗透张量的估计[J],山西煤炭,Vol.17,No.3,1997,p25-27
34.赵坚,岩石节理吻合系数及其对节理特性的影响[J],岩石力学与工程学报,16(6),1997,p514-521
35. Perry, K. E., Jr and Mckelvie, J., Measurement of Energy Release Rates for Delimitations in Compsite Materials[J], Experimental Mech. Vol. 36, No. 1, p55-63, 1996
36. Chen, J. -T and Wang, W -C, Experimental Analysis of An Arbityarity inclined Semi-infinite Crack Terminated at the Bimaterial Interface [J], Experimental Mech. Vol. 36, No. 1, p7-16, 1996
37. Olivit, R. S. and Surace, L., The Damage Assessment of Concrete Structures by Time-frequency Distribution[J], Experimental Mech. 1997, Vol. 37, No. 3, p355-359
38.魏久传,煤层底板岩体断裂损伤与底板突水机理研究[D],博士学位论文,山东科技大学,2000
39.谭学术.鲜学福.郑道访等,复合岩体力学理论及其应用[M],煤炭工业出版社,1994