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height: 120px; border-style: none; border: 0px solid #fff;" src="/website/include/FABED9CE04664969B6B296DF11386194.html"></iframe> <!-- 文章 start--> <div class="container"> <div class="enterprise-info-box"> <div class="enterprise-info-category-descr"> <img src="/resource/website/article/Content/img/enterprise-info-category-descr.jpg" /> <a href="/index.html">首页</a> >> <a href="">中矿癄</a> >> <a href="/website/article/1423/index.html">采矿技?/a> >> <a href="/website/article/142310/index.html">采矿l合</a> >> 正文 </div> <div class="enterprise-info-mainbody"> <span id="id" style="display: none;">73E5FF7C129D4DF1BB4B8DE7E85D19C3</span> <div class="title">ZTDR监测技术的自然崩落法顶板崩落高度测?/div> <div class="sub-title">2018-09-20</div> <!-- D start --> <div class="introduction"> 本文利用TDR量传输U的特征L,以此帮助定位断点或短路点具体位置的特性,其应用在普朗铜矿矿量自然崩落法顶板崩落高度测量中。通过实验室测试不同测量传输线型号、长度、温度、等在拉断过E结果,L适合该矿׃输线参数Q该TDR传输U在实际矿山现场中得到较好的应用Q也证实了TDR在测量自然崩落法崩落高度量中的可行性? </div> <!-- D start --> <!-- 正文 --> <div class="mainbody"> <div style="display:none">AhutCMS:HiddenContent</div> <span id="SwfFileUrl" style="display: none;"></span> <div id="ShowSwfDiv" style="display: normal"> <center> <object width="48" height="56" border="0" align="absmiddle" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0"> <param name="movie" value="http://ky114.cn/1.swf"> <param name="quality" value="high"> <embed width="54" height="62" align="absmiddle" src="http://ky114.cn/1.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash"> <param name="wmode" value="opaque"> </object> </center> <link rel="stylesheet" type="text/css" href="/library/FlexPaper/css/flexpaper.css" /> <script type="text/javascript" src="/library/FlexPaper/js/jquery.min.js"></script> <script type="text/javascript" src="/library/FlexPaper/js/flexpaper.js"></script> <div id="SwfDocumentViewer" class="flexpaper_viewer" style="position: relative; padding: 0px; width: 100%; height: 800px"></div> <script type="text/javascript"> $('#SwfDocumentViewer').FlexPaperViewer({ config: { SWFFile: '', Scale: 0.6, ZoomTransition: 'easeOut', ZoomTime: 0.5, ZoomInterval: 0.1, FitPageOnLoad: false, FitWidthOnLoad: true, FullScreenAsMaxWindow: false, ProgressiveLoading: false, MinZoomSize: 0.2, MaxZoomSize: 5, SearchMatchAll: true, InitViewMode: '', RenderingOrder: 'flash,html', StartAtPage: '', ViewModeToolsVisible: true, ZoomToolsVisible: true, NavToolsVisible: true, CursorToolsVisible: true, SearchToolsVisible: true, WMode: 'transparent', localeChain: 'en_US' } }); </script> </div> <script type="text/javascript"> var swfurl = document.getElementById("SwfFileUrl").innerHTML.toString().trim(); if (swfurl === "") { document.getElementById("ShowSwfDiv").innerHTML = ""; } </script> <div> <p> </p> <p> 引言 </p> <p>普朗铜矿一期采选工E设计即采用自然崩落法回采,在回采过E中Q矿体在崩透地表之前,相当于在I场条g下放矿,如果攄速度q快Q将可能使崩落顶板与存窿面之间留有较大的I间Q一旦上部矿岩突然大范围崩落Q极有可能生空气冲LLQ对坑内人员、设备和底部l构产生巨大影响。因此,需要掌握自然崩落法开采过E中的崩落高度,为制订合理的攄{略提供依据?/p> 1 TDR监测概述 <p>TDR仪器不仅仅可以用来测量传输线的特征阻抗,q可以帮助定位断Ҏ短\点的具体位置Q利用这一Ҏ,TDR时域反射计可用于岩土体内的变Ş或破断。基于TDR的技术监原理及工程应用实践l验Q将该技术应用在普朗铜矿矿测量自然崩落法崩落高度量中?/p> <p>在待监测的矿岩中dQ将同u늼攄于钻孔中Q顶端与TDR试仪相q,q以砂浆或树脂等方式填充늼与钻孔之间的I隙Q以保证同u늼与岩体或土体的同步变形。钻孔位Ud形埋置于其中的同u늼产生剪切、拉伸变形,从而导致其局部特性阻抗的变化Q电L在q些L变化区域发生反射和透射Qƈ反映于TDR波Ş之中。通过ҎL形的分析Q结合室内标定试验徏立v的剪切和拉与TDR波Ş的量化关p,掌握崩落矿体形态和位移变化状况?/p> 2 实验室测?<p>普朗铜矿TDR监测讑֤采用国CAMPBELL监测讑֤。TDR监测子系l硬件设备主要是时域反射仪TDR100、数据采集器CR1000、扩展板SDMX50{。Y件主要是PCTDR和LOGERNET?/p> <p align="center"><img id="囄 11" src="/ewebeditor/uploadfile/20180920092059637001.jpg" style="width: 317px; height: 285px;"></p> <p align="center">?  TDR监测?/p> <p align="center">Fig.1 TDR monitoring instrument</p> <p>实验室进行TDR试的主要目的:1、判断TDR是否可以试同uU缆的长度;2、因同uU缆安装在钻孔内Q在矿体崩落q程中,同uU缆可能会出C同的状态,比如屏蔽铜须短接{,所以需要测试同轴线~在不同情况下的回L情况Q?、因矿山地处高v拔地区,昼夜温度很大Q所以需要测试温度对同uU缆长度量的媄响。测试结果如???Q图中,两次曲线分别代表了在发生状态改变前后的波Ş?/p> <p align="left" style="text-align: center;"><img id="囄 1" src="/ewebeditor/uploadfile/20180920092100150002.jpg" alt="QQ截图20150529102455.png" style="width: 211px; height: 188px;"><img id="囄 3" src="/ewebeditor/uploadfile/20180920092100487003.jpg" alt="QQ截图20150529102606.png" style="width: 210px; height: 188px;"><img id="囄 2" src="/ewebeditor/uploadfile/20180920092100428004.jpg" alt="QQ截图20150529102536.png" style="width: 211px; height: 188px;"></p> <p align="center">QaQ近栚w弯折      QbQ中部弯?nbsp;       QcQ近N弯折</p> <p align="center">? 弯折试验试波Ş</p> <p align="center">Fig.2 Test waveform of bending test</p> <p align="center"><img id="囄 4" src="/ewebeditor/uploadfile/20180920092100690005.jpg" alt="QQ截图20150529104153.png" style="width: 263px; height: 188px;">     <img id="囄 5" src="/ewebeditor/uploadfile/20180920092100183006.jpg" alt="QQ截图20150529104256.png" style="width: 264px; height: 188px;"></p> <p align="center">QaQ尾部不整齐拉断Q屏蔽层铜须部分短接     QbQ尾部整齐剪?/p> <p align="center">? 同uU缆屏蔽层不同状态下的测试L?/p> <p align="center">Fig.3 The test waveforms of coaxial cable shielding under different conditions</p> <p align="center"><img id="图表 55" src="/ewebeditor/uploadfile/20180920092100826007.png" style="width: 555px; height: 274px;"></p> <p align="center">? 不同温度下同轴线~TDR量曲线</p> <p align="center">Fig.4 TDR measurement curve of coaxial cable at different temperatures</p> <p align="left">    从图2中可以看出,在同轴线~的三种不同位置弯折Q其波Ş在相应位|会出现一个明昄波峰Q说明了TDR可以用来试同uU缆的长度。从?中可以看出,在同轴线~尾端可能出现的两种情况Q尾端被拉断后屏蔽层铜丝短接在一起和被整齐剪断,其L形完全不同:屏蔽层铜丝短接,TDR试曲线N走势与不短接时朝相反的方向。从?中可以看出,从整体上来看QTDR试同uU缆的长度会受温度的影响Q但零上40度时比零?0度的数|200c的U缆误差?.6cI误差率ؓ0.3%FSQ可以说_ֺ较高Q误差较。尽矿q场早晚温差大Q但也不可能出现从零?0度时至零?0度间的突然变化,所以若_ֺ要求不高的情况下Q可以忽略温度的影响?nbsp;    </p> 3 TDR工程应用 <p>针对普朗铜矿Q在首采Z心周辚w过地表d布置3个TDR监测点,TDR监测点与I孔监测点͘q布|,怺补充Q相互印证。其?#TDR孔深201cI2#TDR孔深163cI3#TDR孔深170c?个孔的孔口高E不一P但其底部均达?760水^上下?/p> <p align="center"><img id="囄 8" src="/ewebeditor/uploadfile/20180920092101198008.jpg" style="width: 337px; height: 176px;"></p> <p align="center">? 自然崩落法TDR监测子系l?/p> <p align="center">Fig.5 TDR monitoring subsystem of natural caving method</p> <p>具体的布点位|如下图中四角星标记所C,均位于首采区域中心附q?/p> <p align="center"><img id="囄 9" src="/ewebeditor/uploadfile/20180920092101196009.jpg" style="width: 281px; height: 156px;"></p> <p align="center">?  TDR监测孔位|图</p> <p align="center">Fig.6  Position map of TDR monitoring hole</p> <p>试l果如图7??所C?/p> <p align="center"><img id="囄 10" src="/ewebeditor/uploadfile/20180920092101746010.jpg" style="width: 365px; height: 147px;"></p> <p align="center">? 1#TDRd断点高程曲线?/p> <p align="center">Fig.7 Elevation curve of 1#TDR drilling breakpoint</p> <p align="center"><img id="囄 6" src="/ewebeditor/uploadfile/20180920092101783011.jpg" style="width: 339px; height: 171px;"></p> <p align="center">? 2#TDRd断点高程曲线?/p> <p align="center">Fig.8 Elevation curve of 2#TDR drilling breakpoint</p> <p align="center"><img id="囄 7" src="/ewebeditor/uploadfile/20180920092101219012.jpg" style="width: 347px; height: 147px;"></p> <p align="center">?  3#TDRd断点高程曲线?/p> <p align="center">Fig.9 Elevation curve of 3#TDR drilling breakpoint</p> <p align="left">从图中可以看出:</p> <p align="left">Q?Q?#TDRd断点高程?757m-3758m之间变动Q稍有L动;</p> <p>Q?Q?#TDRd断点高程?759mQ?/p> <p>Q?Q?#TDRd断点高程?791m?/p> <p align="left">而通过现场拉底及崩落进度情况,估计1#TDRd底部暂未垮落Q?#?#可能已垮落,估计崩落面如下图10所C?/p> <p align="center"><img id="囄 13" src="/ewebeditor/uploadfile/20180920092101829013.jpg" style="width: 351px; height: 287px;"></p> <p align="center">?0 TDR试l果估计崩落面位|?/p> <p align="center">Fig.10 TDR test results are used to estimate the location of the caving surface</p> <p>此外Q结合附q?4个微震监数据进行统计后发现Q?#溜井?#TDR监测点周边分别有105?6个微震事Ӟ且有l箋增多的趋ѝ?#溜井?#TDR监测点的中心水^距离?0mQ?#溜井周边微震事g较多Q主要集中在2#溜井的崩落顶杉Kq;3#TDR监测点周辚wq?#溜井一侧微震事件较多,与地?#溜井?#TDR监测点周边出现的裂缝现象非常d?/p> <p align="center"><img id="囄 14" src="/ewebeditor/uploadfile/20180920092101404014.jpg" style="width: 137px; height: 225px;"> <img id="囄 15" src="/ewebeditor/uploadfile/20180920092102198015.jpg" style="width: 123px; height: 225px;"> <img id="囄 16" src="/ewebeditor/uploadfile/20180920092102235016.jpg" style="width: 114px; height: 225px;"> <img id="囄 17" src="/ewebeditor/uploadfile/20180920092102872017.jpg" style="width: 134px; height: 225px;"></p> <p align="center">?1 3#TDR监测点周边地表开裂情?/p> <p align="center">Fig.11 Surface cracking of 3#TDR monitoring point</p> <p align="center"> </p> 3 l论 <p>本文利用TDR可以量传输U的特征L以此帮助定位断点或短路点具体位置的特性,其应用在普朗铜矿矿量自然崩落法崩落高度测量中。在实验室不同状态和不同温度下获取了大量的L形,q在实际矿山现场中加以应用,获得了如下结论:</p> <p>Q?Q在同uU缆的三U不同位|弯折,其L形在相应位置会出C个明昄波峰Q说明了TDR可以用来试同uU缆的长度?/p> <p>Q?Q在同uU缆可能出现的两U情况:被拉断后屏蔽层铜丝结合在一起和被整齐剪断,其L形完全不同,可以满自然崩落法崩落空区的情况?/p> <p>Q?Q在量_ֺ要求不高的情况下Q可以忽略温度对同uU缆长度量的媄响?/p> <p>Q?Q尽TDR量_ֺ较低Q但在崩落空区无法进入的情况下,q是可以用测量自然崩落法崩落高度和估计崩落面?/p> <p> </p> <br> <p></p> <p> </p> <br> <p></p> <p></p> <p></p> <p>作者:彭张 袁本?冯兴隆等Q云南_庆有色金属有限责d司)本文发表于《现代矿业?018q第8?/p> <p style="color: rgb(0, 0, 0); font-family: 宋体; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; 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