采煤面底板变形与破坏地电性动态测试
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摘要
对比目前常用的采煤面底板岩层变形与破坏测试方法特点,将地电性动态测试运用到采煤面底板岩层破坏规律测试中,通过在井下巷道底板中布置一定数量测量电极,煤层底板施工一定角度钻孔安装圈式电极,形成固定巷-孔立体测试空间,并根据采煤面回采进度测取不同时期地电参数变化特征分析底板破坏带发育规律及程度。现场探测应用表明:电阻率值的时空变化可以连续动态直观清晰分辨出底板岩层结构破坏发育及破坏带范围;激励电流对岩层裂隙变形与发育位置具有较好灵敏性和指示作用;该测试方法具有针对性,其施工简单,费用较低,不仅对矿井安全生产具有现实意义,对其他岩土工程也有重要参考价值。
Compared with conventional detection of deformation and failure of floor in mining workface, the dynamic detection method of geo-electricity was adopted to detect deformation and failure of floor strata.Through bore drilled in floor strata and floor rock of the coal seam in laneway,the detecting section between two surveys is formed.Then through 64 poles fixed in different location of surveys,the characteristics of the electric field in the floor rock of different periods can be surveyed according to the mining plan.Then the different stages of rock' s geo-electricity of detecting area can be obtained, it really reflected the law of overlaying strata movement and fracture development.The results of application show that the dynamic detection method of geo-electricity has several characteristics:to track and identify the process of deformation and failure of floor strata,and determination of the cracked field; the exciting current for rock deformation and fracture development zoom has an indicative function and sensitivity.This method has low cost,accurate results and dynamic detecting characteristics.
Compared with conventional detection of deformation and failure of floor in mining workface, the dynamic detection method of geo-electricity was adopted to detect deformation and failure of floor strata.Through bore drilled in floor strata and floor rock of the coal seam in laneway,the detecting section between two surveys is formed.Then through 64 poles fixed in different location of surveys,the characteristics of the electric field in the floor rock of different periods can be surveyed according to the mining plan.Then the different stages of rock' s geo-electricity of detecting area can be obtained, it really reflected the law of overlaying strata movement and fracture development.The results of application show that the dynamic detection method of geo-electricity has several characteristics:to track and identify the process of deformation and failure of floor strata,and determination of the cracked field; the exciting current for rock deformation and fracture development zoom has an indicative function and sensitivity.This method has low cost,accurate results and dynamic detecting characteristics.
引文
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[11]张平松,刘盛东,吴荣新,等.采煤面覆岩变形与破坏立体电法动态测试[J].岩石力学与工程学报,2009(9):1 870- 1 895. ZHANG Ping-song,LIU Sheng-dong,WU Rong-xin,et al.Dynamic detection of overburden deformation and failure in mining workface by 3D resistivity method[J].Chinese Journal of Rock Mechanics and Engineering,2009(9):1 870 - 1 895.
[12]尹增德.采动覆岩破坏特征及其应用研究[D].青岛:山东科技大学,2007. YIN Zeng-de.The failure characteristics of overburden strata induced by mining and their applications[D].Qingdao:Shandong University of Science and Technology,2007.
[13]钱鸣高,缪协兴,黎良杰.采场底板岩层破坏规律的理论研究[J].岩土工程学报,1995,17(6):55-62. QIAN Ming-gao,MIAO Xie-xin,LI Liang-jie.The Investigation on theory of the deformation mechanics of mining floor[J]. Chinese Journal of Geotechnical Engineering,1995,17(6):55 -62.
[2]谭志祥.断层突水的力学机制浅析[J].矿业安全与环保,1999(3):21-23. TAN Zhi-xiang.Preliminary analysis of mechanical property of water inrush from faults[J].Mining Safety & Environmental Protection,1999(3):21 -23.
[3]尹增德.采动覆岩破坏特征及其应用研究[D].青岛:山东科技大学,2007. YIN Zeng-de.The failure characteristics of overburden strata induced by mining and their applications[D].Qingdao:Shandong University of Science and Technology,2007.
[4]刘树才.煤矿底板突水机制及破坏裂隙带演化动态探测技术[D].徐州:中国矿业大学,2008. LIU Shu-cai.Mechanism of water inrush from coal seam floor and continuous survey of fractured zones in coal seam floor[D]. Xuzhou:China University of Mining and Technology,2008.
[5]张平松,吴基文,刘盛东.煤层采动底板破坏规律动态观测研究[J].岩石力学与工程学报,2006,25(增1):3 009- 3 013. ZHANG Ping-song,WU Ji-wen,LIU Sheng-dong.Study on dynamic observation of coal seam floor' s failure law[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(suppl.1):3 009 -3 013.
[6]张文泉,张红日,徐方军.大采深倾斜薄煤层底板采动破坏形态的连续探测[J].煤田地质与勘探,2000,28(2):39- 42. ZHANG Wen-quan,ZHANG Hong-ri,XU Fang-jun.Continuous exploration for the mining failure form of the incline and thin coal seam' s floor under the high depth[J].Coal Geology and Exploration,2000,28(2):39 -42.
[7]刘传武,张明,赵武升.用声波测试技术确定煤层采后底板破坏深度[J].煤炭科技,2005(3):4-5. LIU Chuan-wu,ZHANG Ming,ZHAO Wu-sheng.Destroying depth of coal seam floor's failure by sound wave technology[J]. Coal Science and Technology,2005(3):4-5.
[8]张平松,刘盛东,吴荣新.地震波CT技术探测煤层上覆岩层破坏规律[J].岩石力学与工程学报.2004,23(15):2 510 -2 513. ZHANG Ping-song,LIU Sheng-dong,WU Rong-xin.Observation of overburden failure of coal seam by CT of seismic wave [J].Chinese Journal of Rock Mechanics and Engineering,2004,23(15):2 510-2 513.
[9]王勃,刘盛东,张朋.并行网络电法仪进行煤矿底板动态监测[J].中国煤炭地质,2009,21(3):53-57. WANG Bo,LIU Sheng-dong,ZHANG Peng.Application of network parallel electrical instrument on dynamic coal floor monitoring [J].Coal Geology of China,2009,21(3) -.53 -57.
[10]张朋,王一,刘盛东,等.工作面底板变形与破坏电阻率特征分析[J].煤田地质与勘探,2011,39(1):64-67. ZHANG Peng,WANG Yi,LIU Sheng-dong,et al.Resistivity characteristic andalysis of deformation and failure of floor in workface[J].Coal Geology and Exploration,2011,39(1):64 -67.
[11]张平松,刘盛东,吴荣新,等.采煤面覆岩变形与破坏立体电法动态测试[J].岩石力学与工程学报,2009(9):1 870- 1 895. ZHANG Ping-song,LIU Sheng-dong,WU Rong-xin,et al.Dynamic detection of overburden deformation and failure in mining workface by 3D resistivity method[J].Chinese Journal of Rock Mechanics and Engineering,2009(9):1 870 - 1 895.
[12]尹增德.采动覆岩破坏特征及其应用研究[D].青岛:山东科技大学,2007. YIN Zeng-de.The failure characteristics of overburden strata induced by mining and their applications[D].Qingdao:Shandong University of Science and Technology,2007.
[13]钱鸣高,缪协兴,黎良杰.采场底板岩层破坏规律的理论研究[J].岩土工程学报,1995,17(6):55-62. QIAN Ming-gao,MIAO Xie-xin,LI Liang-jie.The Investigation on theory of the deformation mechanics of mining floor[J]. Chinese Journal of Geotechnical Engineering,1995,17(6):55 -62.
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