Construction method of leading low-level controllable drainage through water-conducting fault. When the underground engineering is excavated to a certain distance from the fault, it stops excavating to set up water-barrier pillars, constructs downhill section and water-releasing chamber on both sides of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the face of the A circle of water-proof holes is formed; several observation holes and valves are constructed on the face of the face; when the water pressure and water volume in the observation holes drop below the safety value, under the protection of the water-proof and water-proof effect of the water-proof holes, the face of the face is re-tunneled through the water-proof pillar, the fault and the water-proof pillar on the other side, and the roadways or tunnels within the fault and the water-proof pillar on both sides are closed after full-face waterproof support. Water hole orifice valve and waterproof sealed door to achieve fault water shutoff. The invention can realize effective controllable low-level drainage when underground engineering passes through water-conducting faults, and ensure safety, stability and economic construction of cross-fault construction.
【技术实现步骤摘要】
超前低位可控泄水过导水断层施工方法
本专利技术涉及矿井、隧道等地下工程过断层等含水、导水构造带施工方法,具体涉及一种超前低位可控泄水过导水断层施工方法。
技术介绍
矿井巷道与隧道等地下工程掘进施工中常常会遇上断层等导水、含水构造破碎带,目前行业内采用工作面超前注浆、地面和工作面结合超前注浆、超前管棚或超前管棚配合注浆等工艺过断层破碎带。CN104532864B公开的超前辐射状降水通道系统及方法:“在隧道过断层施工中,在隧道开挖面内超前施工水平降水通道并在通道内施工泄水钻孔,利用真空泵将底部泄水钻孔内涌水抽出从而降低破碎带内水位”,本方法向破碎带内超前施工小断面水平降水通道施工风险小于大断面隧道,但小断面降水通道同样受破碎带构造与含水影响,施工及支护非常艰难、危险,通道内涌水夹带破碎带内泥沙大量涌出而导致掌子面冒顶失控,另外破碎带内岩石非常破碎、气密性很差,利用真空泵抽吸底部钻孔内涌水因外部空气进入而失效,无法有效降低开挖面内水位也无法实现可控泄水。CN101798930B也为隧道泄水工艺,其泄水通道位于隧道开挖区域外。CN102808628B采用注浆工艺,是目前大断层破碎带主流施工工艺,具体为掌子面预注浆和壁后注浆结合,本方法在承压含水破碎带及致密砂砾破碎带内可注性差、需高压化学注浆,注浆工艺复杂、难度大、成本高等不足。CN104819010B和CN102031974B、CN108005675A均为注浆工艺,但在注浆工艺与配套支护上有所区别。综上所述,目前行业内过导水断层破碎带多为注浆堵水工艺配合超前管棚及超前泄水等技术措施,但存在注浆成本高、工艺复杂,泄 ...
【技术保护点】
1.超前低位可控泄水过导水断层施工方法,其特征在于:当地下工程掘进至距断层一定间距时停止掘进以留设防隔水间柱,在掌子面两侧依次施工下坡段和泄水硐室,在下坡段与掌子面交接处安装向泄水硐室侧开启的防水密闭门,在泄水硐室靠断层侧岩壁上凿洞浇筑安装阀门并凝固后,打开阀门穿过阀体向断层内施工钻孔并最终围绕开挖面形成一圈泄水孔对断层内积水进行有效泄水、对开挖空间进行截水,泄水硐室内积水通过水泵排出;在掌子面施工数个观察孔及阀门以观测泄水孔泄水与隔水效应,当所有观测孔无水涌出时,在泄水孔的泄水和隔水效应保护下,掌子面重新掘进穿过防隔水间柱、断层及另一侧防隔水间柱,并将断层及两侧防隔水间柱内巷道或隧道施作全断面防水支护后关闭泄水孔孔口阀门和防水密闭门以实现断层堵水以降低矿井抽水费用与运营成本。
【技术特征摘要】
1.超前低位可控泄水过导水断层施工方法,其特征在于:当地下工程掘进至距断层一定间距时停止掘进以留设防隔水间柱,在掌子面两侧依次施工下坡段和泄水硐室,在下坡段与掌子面交接处安装向泄水硐室侧开启的防水密闭门,在泄水硐室靠断层侧岩壁上凿洞浇筑安装阀门并凝固后,打开阀门穿过阀体向断层内施工钻孔并最终围绕开挖面形成一圈泄水孔对断层内积水进行有效泄水、对开挖空间进行截水,泄水硐室内积水通过水泵排出;在掌子面施工数个观察孔及阀门以观测泄水孔泄水与隔水效应,当所有观测孔无水涌出时,在泄水孔的泄水和隔水效应保护下,掌子面重新掘进穿过防隔水间柱、断层及另一侧防隔水间柱,并将断层及两侧防隔水间柱内巷道或隧道施作全断面防水支护后关闭泄水孔孔口阀门和防水密闭门以实现断层堵水以降低矿井抽水费用与运营成本。2.根据权利要求1所述的超前低位可控...
【专利技术属性】
技术研发人员:彭云,高忠民,李寿山,郭虎强,李波,
申请(专利权)人:中蓝长化工程科技有限公司,
类型:发明
国别省市:湖南,43
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