共查询到18条相似文献,搜索用时 449 毫秒
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刘炎生 《有色冶金设计与研究》2013,(4):10-12
楚雄矿冶六苴矿区2#竖井在井筒施工到430 m时,遇到一涌水断层,其水量及水压较高。在直接穿过断裂层较困难的情况下,经采用工作面预注浆封堵,有效减少了断层涌水,较顺利地穿过了该断层,大大加快了施工进度,同时也确保了工程施工中的质量与安全。本文就工作面预注浆的施工工艺、注浆压力及监理控制要点等进行了分析与阐述。 相似文献
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针对云南澜沧铅矿有限公司老厂深部资源主探矿竖井井深720~770 m段涌水量已超过6 m3/h,通过进一步分析地质勘探资料,认为随着井筒继续下掘,井筒涌水量有进一步增加的可能。从确保施工安全与施工质量方面考虑,进行注浆堵水已刻不容缓。本文分析、研究了井筒涌水的原因,提出壁后注浆堵水处理措施。认为通过壁后注浆堵水,一方面可以胶结、充填井筒内壁裂隙,有效地将井筒涌水进行封堵;另一方面,随着注浆帷幕的形成,能够有效加固井壁,提高井筒安全性。通过合理的注浆施工,能够达到有效堵水的作用,并在实际施工中得到验证。 相似文献
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刘继明 《金属材料与冶金工程》2009,37(5):49-52
详细介绍了三贵口主井淹井事故处理技术。通过勘测井下涌水,设计堵水方案,堵层厚度计算以及注浆量估算,采取抛渣和注浆封底方法,成功地堵住了涌水。 相似文献
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文中介绍了在涌水较大的竖井井筒掘砌施工中,采用工作面预注浆,合理选择注浆工艺,既可改善施工条件,又能加快工程进度。 相似文献
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Panuwat Taerakul Mikko Lamminen Yontian He Harold W. Walker Samuel J. Traina Earl Whitlatch 《Canadian Metallurgical Quarterly》2004,130(7):816-823
In this research, we examine the long-term ( ~ 4 years) behavior of fixated flue gas desulfurization (FGD) material grout following placement within the Roberts–Dawson underground coal mine. Surface water and groundwater samples were collected to examine the impact of grouting on water quality, and core samples were obtained to assess the geochemical stability of the grout material. Surface water samples collected from the main seep at the Roberts–Dawson mine indicated that 4 years after grout placement the long-term fluxes of acidity, iron, sulfur, and calcium were slightly elevated compared to pregrout conditions. The long-term discharge of these constituents was likely due to continued dissolution of grout material (for Ca and S) as well as changes in flow paths and subsequent solubilization of metal salts accumulated within the mine voids (for acidity, Fe, Al, and S). Although the fluxes of these elements were elevated, no measurable deleterious impact was observed for the underlying groundwater or adjacent surface water reservoir. Groundwater samples collected from monitoring wells installed within the grout material indicated that acid mine drainage waters were neutralized by the grout material. Mineralogical analyses demonstrated minimal penetration of mine drainage water into the high strength fixated FGD material grout, and little weathering of the material was observed. These data indicate that the high strength fixated FGD material grout injected into the Roberts–Dawson mine was geochemically stable and could locally neutralize mine drainage waters. However, more complete grouting and more extensive mine flooding is likely needed in order to bring about significant improvements in seep water quality. 相似文献
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广西大新锰矿目前采矿为露采转地采井下基建阶段,迫切需要加快工作面掘进贯通速度。在施工过程中,因矿区地质水文条件的影响,遇到诸多难题,2年多来一直在尝试各种施工新工艺、新技术解决井下施工中困扰,其中超前支护、光面爆破和注浆3种工艺技术有效解决了在软岩及涌水等不良地质条件下的施工难题,保证了矿山生产正常运转和施工安全,给企业带来了良好经济效益。 相似文献
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位于海边仅15m左右的仓上金矿新立矿区主竖井利用并结法施工。由于夏季施工以及竖井旁海水养殖厂水位影响导致冻结壁难以形成,最终采取降水法使冻结成功。 相似文献
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针对东坪金矿三期主竖井渗漏水严重的实情,详述了壁后注浆方案及施工过程,并对注浆施工中若干问题的解决、注浆效果以及壁后注浆的体会作了介绍。为类似工程的处理提供了经验。 相似文献