张马屯铁矿区既有阻水帷幕薄弱区治理技术方案

Technical Scheme of the Integrated Treatment for the Weakness Zone of the Existing Water Plugging Curtain in Zhangmatun Iron Mining Area

针对张马屯铁矿矿区既有帷幕薄弱区的裂隙涌水、破碎地层等结构薄弱部分开展了综合治理方案探索。通过对帷幕、地质、涌水及钻孔资料的分析,结合物探、井下及钻孔探测进行了全面地质分析,确定了区域水力补给水平、帷幕薄弱段位置、不良构造形态及富水空间分布情况,结合各施工要素确定了精准治理思路,根据"物探先行、钻探跟进"思路,提出了矿体帷幕薄弱区综合治理技术方案。研究表明:(1)帷幕补注浆方法对于帷幕稳定性治理具有积极作用,减水效果明显;(2)基于物探-钻探的帷幕区薄弱段综合分析手段,能够对帷幕薄弱性进行较为准确和可靠的评价,辅以材料选用等手段可以为注浆治理提供科学依据。张马屯铁矿既有帷幕薄弱区在经过综合治理后减水效果显著,破碎岩体耐压强度提高、涌水减少,治理成效明显,可为同类工程实践提供参考。

thin and soft structural links such as water gushing from cracks and broken strata in the curtain weakness zone of the mining area.Through the analysis of resuls of curtain,geology,water gushing and drilling engineering,the integrated geological analysis was done based on geophysical exploration,subsurface exploration and drilling exploration,and regional hydraulic recharge level,weak section position of curtain,bad structure shape and water-rich spatial distribution were determined.Combined with the construction elements,the precise treatment idea was determined.The integrated treatment technical scheme for the weak zone of grouting curtain was proposed based on the thought of"geophysical exploration first,drilling follow-up".The study results showed that:(1)the curtain supplementary grouting method had a positive effect on the curtain stability control,and the water blocking effect was very significant;(2)the comprehensive analysis method based on geophysical exploration and drilling for weak sections of curtain grouting could be used to make accurate and reliable evaluation for the curtain weakness and provide a scientific basis for grouting treatment by means of material selection.After integration treatment of the existing weak curtain area in Zhangmatun Iron Mine,the water blocking effect was remarkable,the compressive strength of broken rock mass was increased,and the water gushing was decreased,therefore,the treatment effect was obvious.The integrated technical scheme proposed in this paper can provide reliable reference for similar engineering practice.