近距离煤层群采动后底板应力分布及回采巷道布置方式研究
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摘要
本文通过理论分析、数值模拟等方法对近距离煤层群采动后底板应力分布及回采巷道布置方式进行了研究。采用理论分析方法,对近距离煤层煤柱稳定性进行了分析,确定了塑性煤柱临界宽度;通过理论计算得到了在不同宽度的煤柱均布载荷作用下底板岩层不同水平截面处的应力分布曲线,得到煤柱均布载荷在底板煤岩层中按一定的规律扩散和衰减的规律。采用FLAC~(3D)数值模拟方法对煤柱(体)在不同埋深和不同宽度条件下底板岩层应力分布规律进行了数值模拟研究,得出了煤柱在底板岩层上的应力传递影响角和应力最大集中系数基本不随煤层埋藏深度变化而变化的规律,并确定了不同宽度的煤柱及一侧采空煤体在底板岩层不同水平截面处的应力传递影响角。采用理论分析和数值模拟相结合的方法,对近距离煤层群回采巷道的布置方式进行了研究,确定了沿空掘巷窄小煤柱宽度以及在不同条件下的下部煤层回采巷道的合理位置,从而得到发耳煤矿近距离煤层群回采巷道布置方式。通过现场应用,本文所研究的结论能够较好的指导实际生产。
The panel entry arrangement of close multiple coal seams is studied through theoretical analysis, numerical simulation methods. Analyses the coal pillar's stability of the close multiple coal seams, confirms the width of coal pillar, and got the concentrated stress' distribution curve of several width's coal pillar at different section in the floor terrane through theoretical numeration, and the uniformity stress of coal pillar is diffused and attenuated according to an definite pattern. The stress distribution pattern in the floor terrane of the coal pillar with different embedding depth and width through the method of FLAC~(3D) numerical simulation, the pattern about the transfer affection angle of stress and the modulus of stress concentration didn't change with the embedding depth of coal seam is got , and then the transfer affection angle of stress of different width's coal pillar at different section in the floor terrane. The panel entry arrangement of close multiple coal seams is studied though the method of combining theoretical analysis with numerical simulation, and the digging arrangement of the panel entry is adapted to use at the existing production, and confirm the width of the coal pillar about the gob-side entry driving and the interspace position relation of the panel entry of coal seams at different width's coal pillar, and then the extraction roadway arrangement of close multiple coal seams of faer coal mine is got. Finally the panel roadway arrangement which brought forward by this article is validated feasible though the method of fact- observation.
The panel entry arrangement of close multiple coal seams is studied through theoretical analysis, numerical simulation methods. Analyses the coal pillar's stability of the close multiple coal seams, confirms the width of coal pillar, and got the concentrated stress' distribution curve of several width's coal pillar at different section in the floor terrane through theoretical numeration, and the uniformity stress of coal pillar is diffused and attenuated according to an definite pattern. The stress distribution pattern in the floor terrane of the coal pillar with different embedding depth and width through the method of FLAC~(3D) numerical simulation, the pattern about the transfer affection angle of stress and the modulus of stress concentration didn't change with the embedding depth of coal seam is got , and then the transfer affection angle of stress of different width's coal pillar at different section in the floor terrane. The panel entry arrangement of close multiple coal seams is studied though the method of combining theoretical analysis with numerical simulation, and the digging arrangement of the panel entry is adapted to use at the existing production, and confirm the width of the coal pillar about the gob-side entry driving and the interspace position relation of the panel entry of coal seams at different width's coal pillar, and then the extraction roadway arrangement of close multiple coal seams of faer coal mine is got. Finally the panel roadway arrangement which brought forward by this article is validated feasible though the method of fact- observation.
引文
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3.申宝宏.中国煤炭工业可持续发展的新型工业化之路-我国煤炭开采技术发展现状及展望[M].北京:煤炭工业出版社,2004
4.中国石油和化学工业协会,中国石油和化工经济数据快报,2005(16):258
5.陈炎光,陆士良.中国煤矿巷道围岩控制[M].徐州:中国矿业大学出版社,1994
6.Т.Ф.葛尔巴节夫,Л.П.札柏.库兹巴斯煤层煤层群上行顺序开采法[M].北京:煤炭工业出版社,1958
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8.徐永垠.采矿学[M].徐州:中国矿业大学出版社,2003
9.杜计平,汪理全.煤矿特殊开采方法[M].徐州:中国矿业大学出版社,2003
10.Heasley,K.A.Akingkugbe,O.,Simple program for estimating multiple-seam interactions,Mining Engineering[J].2005,57(4):61-66
11.Hill RW.Multiseam mining in South Afriean Collieries,In,Peng55,Proeeedings of the14th International Confereneeon Ground Controling Mining,Morgantown,WV,West Virginia University.1995,305-311
12.黄庆享.近距离煤层上行开采底板稳定性分析[J].西安矿业学院学报,1996,16(4):291-294
13.陆士良,姜耀东,孙永联.巷道与上部煤层间垂距Z的选择[J].中国矿业大学学报,1993,22(1):1-7
14.陆士良.巷道与上部煤柱边缘间水平距离X的选择[J].中国矿业大学学报,1993,22(2):1-7
15.陆士良.无煤柱护巷的矿压显现[M].北京:煤炭工业出版社,1982
16.陆士良.岩巷的矿压显现与合理位置[M].北京:煤炭工业出版社,1984
17.钱名高,石平五.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2003
18.林衍,谭学术,胡耀华.对缓倾近距离煤层群同采合理错距地探讨[J].贵州工学院学报,1994,23(2):33-38
19.H.Yavuz,An estimation method for cover pressure re-establishment distance and pressure distribution in the goaf of longwall coal mines,International Journal of Mechanics and Mining Sciences[J].2004,41(2):193-205
20.任德辉.井工开采矿山压力与控制[M].重庆:重庆大学出版社,1990
21.刘善荃.缓倾斜煤层群巷道布置与支护[J].煤炭科学技术,1976,Z1(14):61-63
22.朱润生,韦志宏.极近距离煤层下分层回采巷道支护技术研究与实践[J].华北科技学院学报,2007,10(4):22-24
23.赵玉宝.薄煤层群井田的采区划分及采区巷道布置[J].黑龙江科技学院学报,2002,12(2):14-16
24.李世昌.不稳定煤层群联合布置分段开采的实践[J].湘潭矿业学院学报,1988,3(1):19-24
25.李维光.急倾斜煤层群联合开采合理错距研究[J].矿山压力与顶板管理,2003(2):83-86
26.万维平,刘碧雁,钱正洲.金佳矿井近距离煤层群区段无煤柱开采的分析与实践[J].矿业安全与环保,2003,16(增刊):170-171
27.黄庆享,苏普正,何万盈,于峰.特殊条件下近距离煤层上行开采研究[J].陕西煤炭,1996,16(2):12-16
28.田振清,邓硕刚,张治军,赵海燕.近距离煤层回采巷道平移布置方式研究[J].煤炭科学技术,2008,36(4):20-24
29.翟新献,周英,岑奕.近距离煤层综放开采回采巷道支护研究[J].煤,2000(4):26-28
30.李良林,陈怀合,聂建湘.近距离煤层开采的矿压显现[J].煤炭技术,200,23(11):51-53
31.周锡德,李军.缓倾斜煤层群的逐层开采[J].煤矿现代化,1993(2):5-26
32.王文博.近距离煤层群联合开采时合理错距的确定[J].煤炭工程师,1993(3):60-64
33.郝朝瑜,王继仁,张俭.近距离煤层群联合开采底板巷道围岩支撑压力研究[J].矿业快报,2007,9(9):21-23
34.孙玉宁,李化敏.煤层群开采矿压显现的时空关系及相互影响研究[J].煤炭工程,2004(1):54-58
35.田锋,时圣国.浅析近距离煤层同采合理错距[J].山东煤炭科技,2008(3):65-67
36.吴洪清.浅谈煤层群开采的采区巷道布置[J].科技资讯,2008(1):33
37.高文龙,徐洁琼.谈高瓦斯煤层群的采区巷道布置措施[J].科技资讯,2007(24):231-232
38.刘立,邱贤德,将茂才,李欣南,蒲体源.煤层群盘区底板巷道的合理位置研究[J].煤炭科学技术,1996,26(7):24-29
39.颜献禹,周锡德。煤层群采用单层开采方式的可行性分析[J].矿业安全与环保,1999(4):32-33
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