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当在涌水量大的裂隙性岩石、断层破碎带、岩溶地层等比较复杂的地质和水文地质条件下掘进竖井时,常因灾害性的涌水而淹井。山东张家洼铁矿小官庄矿南风井和广东凡口铅锌矿金星岭竖井,就是在施工中因涌水过大而停工,拖延基建工期,被迫采用工作面或地面预注浆,才恢复了掘进施工的。因此,凡是在上述地质和水文地质条件下,采用注浆堵水,是行之有效的,并且对加快竖井掘进速度和改善井建质量具有重要意义。在复杂条件下掘进竖井多采用冻结法、疏干法、钻井法和注浆法等特殊凿井法。注浆法和前几种方法相比,具有工期短、施工设备和工艺简单、
When tunneling under complicated geologic and hydrogeological conditions such as fissure rock, fault fracture zone and karst formations with large water gushing, wells are often flooded by catastrophic gushing water. Shaoguan Zhangjiawa iron ore village south of the shaft and Guangdong Fankou lead-zinc Jinxingling shaft, that is, due to excessive gushing in the construction and suspension of work, delay of infrastructure construction period, was forced to use the face or ground pre-grouting, Only to resume excavation construction. Therefore, it is effective to use grouting to plug water under the above geological and hydrogeological conditions, and it is of great significance to speed up shaft digging speed and improve well construction quality. Under complicated conditions, the shaft used for excavation mostly adopts special drilling method such as freezing method, drainage method, drilling method and grouting method. Grouting method and compared to the previous methods, with a short construction period, construction equipment and technology is simple,