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none;">B6438B6330B142188EBA22C5BC829D66</span> <div class="title">金属矿山采空区灾x制技?/div> <div class="sub-title">2018-11-14</div> <!-- D start --> <div class="introduction"> 金属矿山采空区灾x制技术——江西理工大学n?李小双专家报? </div> <!-- D start --> <!-- 正文 --> <div class="mainbody"> <div style="display:none"> 金属矿山采空区灾x制技? 金属矿山采空区灾x制技? 汇报人:赵奎、李双 中国 矛_? 2 018.08.09 Copyright©2010 NERIN All Rights Reserved. 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 汇报提纲 一?背景介绍 二?主要技术内? 三?工程应用 四、研I成? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 一?背景介绍 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 背景介绍 ? ? ? 国内千米׃已达80余Q最?700m? I场法开采所占比例超q?0% 有色金属矿山I区规模?00~1000万m3的矿山占8.18%Q但MU却?0%? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 背景介绍 ? ? 采空ZU总量大,重叠贯通性强Q安全隐患严重,I区下开采风险性极高? 2001~2015Q采I区事故占矿׃故总量42.3%Q死亡h数占?5.9%? ? ? ? 2001q_q西南丹Q?.17Q采I区透水Q死?1人; 2005q_沛_邢台Q?1.6Q采I区坍塌 Q死?7人; 2015q_׃q邑Q?2.25Q采I区坍塌Q?人死亡,13Z落不明? ? 2015q_国家安监d开展“金属非金属C矿山采空ZҎ查?2.8亿m3/6.67亿m3? 2016q_国务院安委会下发 “金属非金属C矿山采空Z故隐患治理工作方案?? ? I区? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 背景介绍 ? 存在问题Q? ? I区处? ? ? ? I区下开? I区? 岩体q安全控制 岩体q监测预警 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 二?主要技术内? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 二、卡林型金矿矛_理的技术难? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 上下盘间支撑? 地应力测? 地应力也U初始应力、原岩应力? C、露天开采岩矛_形与破坏的根本应力? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 地应力只能通过量Ҏ得到? 地应力是定工程岩体力学属性、进行围岩稳 定性分析,实现岩石工程开挖设计和决策U学 化前提条件?018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 通过孔隙水压力计监测Q掌握地下水在岩体中的渗透情? C水也是采I区灑֮发生的重要环境因素? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 采空区高密度甉|量 高密度电法:Ҏ电阻率的分布Q较大范围内 对空行普查? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 采空区探地雷达法量 探地雯Q根据接收电L的旅行时?亦称? E走?、幅度与波Ş资料Q可推断介质l构Q? 定I区大概范围Q详查? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 采空区激光探法量 Ȁ光探:通过d{,直接在空区内探测Q? 得到I区形态、体U等Q精测定空区? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 岩层探测仪(d孔内岩体l构{)? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 l构弱面QY弱夹层) 岩溶 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 地质前预报QTEM地质前探测Q? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 地质前预报? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 1、采I区赋存环境探测 三维Ȁ光法—地质超前预报? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 二、卡林型金矿矛_理的技术难? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 2、采I区关键点充填支撑 ? ? ? ? 采场上采的关键支撑点 I区的关键充填? 整个矿体开采的不动? I区中难采矿可采? 上下盘间支撑? 关键支撑的理论原? 关键支撑的实施效? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 2、采I区关键点充填支撑 ? ? ? 支撑点位|? 支撑点两侧变形能 整体释放变Ş? 2 2 2 2 2 2 2 q l P? P? P? P? P? P? 2Fql P?P? 3 Pa P? P? 1 q F 2 ?Fq 7Fq ?q l ?F F 5 4 Q1 = 2 EI 20 + 12l P? Pa + P? Pa + P?3 + ? P? P? P? P? P? P? 8l 12 4 3l 3 3 P?P? P? P? P? P? P? P? 2 2 2 2 2 2 2 3 5 2 P? P? P? P? 2Fq P? P? P? P? 1 P− q F 2 + Fq q l + F q l 2F l 2Fql a + 4l q 5 4 2 3 2 a ? Q2 = 2 20 ?2l 2l ? Pa −F + ?FqlPa + P? P? P? P? P? P? P? P? P? P? EI 8l 4 3 3 3 3 15 P? P? P? P? P? P? 2 2 2 3 5 2 P? P? P? P? P? P? 1 1 F Fq Fql ?2F 2F l 2Fql a + 4l q 4 3 2 a ? Q = 2 (Q1 + Q2 ) = 2EI P?6l ?12 PP P? Pa + P? Pa + P? P? P? P? P? P? EI 3 3 3 3 15 P? P? P? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 2、采I区关键点充填支撑 6 3 x 10 .5 2 1 0 ? ? ? 支撑点位|? 2 .5 1 支撑点两侧变形能 整体释放变Ş? ( x1=l=10,Q'=0) .5 00 5 10 a(m) 15 20 ? ? 变Ş能Q最?QQ1=Q2Q? 能量对称点处梁变形能最? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 2、采I区关键点充填支撑 板岩体完整Q岩性一_ 充填支撑体位于能量对U点处, 整个I区能量释放最,支护效果最 好? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 2、采I区关键点充填支撑 岩性不一_充填支撑位于能量对称点,整个 I区释放的变形能最? 能量对称ҎQ能量对U点即ؓ采空区充填的关键支撑点, 关键点充填,可以节省充填成本Q实现空区稳定? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 二、卡林型金矿矛_理的技术难? 采空区群下回? 应力隔离 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 3、采I区下回采应力隔离 I区下矿体开采: ? ? ? 上部I区地压zd剧烈 I区岩体Ud诱发深部岩移 上部ơ生应力向深部{U? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 3、采I区下回采应力隔离 井下充填应力隔离? ? ? ? ? I间分割、避免诏? 吸收、隔M部岩体应? 改变围岩受力状? 降低地表沉降风险 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 3、采I区下回采应力隔离 們֐延充填不同中段位移{值线 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 3、采I区下回采应力隔离 ? 效果Q? 們֐延隔离可限? 围岩UdQ减岩Ud 致的地表沉降? 們֐延隔离位置? 同,限制岩移效果不同 們֐延整体充填? |可Ҏ能量对称点确 ? 們֐延充填不同水^地表沉降区域 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 二、卡林型金矿矛_理的技术难? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 4、采I区E_多源监测与耦合分析 ? 采空区关键支撑矿p变声发射Ҏ? 岩石蠕变损伤声发模? 蠕变应变 和篏计声发射?理论关系 岩石蠕变声发试? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 4、采I区E_多源监测与耦合分析 ? 采空区关键支撑矿p变破坏分? 1 .60 1.55 .50 4 3 1 .35 .30 .25 .20 .15 .10 .05 .00 .950 6 4 2 0 轴向应变 d 1 轴向应变 轴向应变? 1 轴向应变? B c 1 2 A 1 b A1 B1 1.45 a 1.40 1 1 1 0 1 减速阶D? {速阶D? 加速阶D? -2 1.35 -1 1 1.300 900 1200 1500 1800 2100-2 0 -4 2000 300 600 500 1000 旉/s 1500 旉QsQ? 应变率突增可作ؓ判定加速蠕变与E_蠕变的分界点 5 00 400 00 1.60 4 3 20 1 .60 .55 .50 .45 .40 .35 1.30 0 3 轴向应变 轴向应变? 主频 轴向应变 轴向应变? 累计能量 1 .55 1 2 15 1 1 1.50 1.45 2 3 10 1 0 1 C B 200 100 0 O A 1 -1 1 .40 .35 1.30 0 0 5 1 -2 1 -1 -2 0 600 900 1200 1500 1800 2100 -3 300 300 600 900 1200 1500 1800 2100 旉QsQ? 旉QsQ? 蠕变破坏预测ҎQ事件率H增Q篏计声发射参数持箋增长Q高、低主频同时? l出玎ͼ作ؓ岩石蠕变坏的前兆? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 4、采I区E_多源监测与耦合分析 ? 采空区顶板变形破坏分? 通过监测I区板的实际位UdD征岩体的变Ş 实际监测的位Ud?实际位移?仪器量误差 无变形阶D: 2 2 2 n n σ σˆ = n ? = σ n ? σ~ ?σˆ P? 无变形阶D? E_变Ş阶段 加速变形阶D? P? P? σˆ < σ~ < σˆˆ P? P? E_变Ş阶段Q? σ~ ?σ ˆ ˆ P? P? 2 n n +1 + σˆˆ = S σ n ? 1 2n 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 4、采I区E_多源监测与耦合分析 ? I区板q前兆声发识? 声发b? 声发长E相x? 声发相对强弱指? 岩体q前,声发b?岩体q前,声发强度长E相 急剧降低 x数H值出现最大—减模? 岩体q前,声发相? 强弱指标q速回? ? ? 板q前,其声发射监测指标频度Q量度)出现Ȁ增—回落现象? 声发监指标频度(量度Q出现激增—回落ƈ不说明岩体一定失E? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 4、采I区E_多源监测与耦合分析 板q预测模式 σ~ ?σˆ 无变形阶D? σˆ < σ~ < σ q稳变Ş阶段 P? P? P? P? ˆ P? ˆ P? 无声发射现象或少量声发射产生 P无声发现象生或一定量的声发射产生 P? 无变形稳定模? q稳变ŞE_模式 ~ ˆ ˆ P? ~ ˆ P? P”??σ 加速变形阶D? P? σ ?σ 加速变形阶D? ˆ P? P? P? 声发特征参量频度(量度Q激?—回? P? 声发特征参量频度(量度Q激? P? P? 加速变形稳定模? 加速变形不E_模式 ? 加速变形不E_模式是空区顶板失E的前兆 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 三?工程应用 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 三、工E应?—空区关键点支撑 8 x 10 2.1 2 1 1 .05 2 A1 A2 A3 A4 A5 .95 1.9 .85 A1 A2 A3 ???|? A4 A5 江西荡坪钨业有限公司宝山矿区+475ml? 道矿柱回采过E中Q应用采场关键点支撑 Q? ҎM变Ş能最的能量对称原理Q? 定了A3矿柱作ؓ怹支撑矿柱。其余位 |的矿柱可以回收? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 三、工E应?—空区群下应力隔? 充填隔离? 对焦冲金矿井下各中段I区分别充填形成 应力隔离带进行数值模拟,分析l果昄 充填-411m中段?431m中段均可有效控制 板及上覆岩体移动,兼顾考虑充填效果 与充填成本,选择-431m中段充填形成关键 隔离层可起到应力隔离控制地压的效果? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 三、工E应?—空区顶板稳定多源监与耦合分析 应用于凤凰山矿业有限公司-240m中段D矿 回收Q在回采q后I区板布置监测仪器 对岩体进行位UR声发射联合监测。位U? 监测仪器选用板沉降仪,声发监采 用PXAE自动采集q箋声发监A。经3? 月连l监,成功预测D1点附近区域? 体变形冒落? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 三、工E应?—充填采矿工E实? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 三、工E应?—充填采矿工E实? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 三、工E应?—充填采矿工E实? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? 三、工E应?—充填采矿工E实? 2 018q中国石家庄W九届矿业科技大会 金属矿山采空区灾x制技? ???? ?? 2 018q中国石家庄W九届矿业科技大会 </div> <span id="SwfFileUrl" style="display: none;">/pdf/swf/201811/2018_1114_110035_413.swf</span> <div id="ShowSwfDiv" style="display: normal"> <center> <object width="48" height="56" border="0" align="absmiddle" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" 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