Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Narrow rock wall crane beam excavation method
The invention discloses a narrow rock wall crane beam excavation method. The method comprises the steps that after excavation of a cavern top layer is completed, excavation of a cavern rock wall cranebeam layer is conducted in a partitioned mode from the middle to the two sides; firstly, a middle groove area is excavated, protective layers on the two sides are stripped at a time, and after supporting is completed, pre-splitting blasting excavation is conducted on inclined face holes of a rock table, and blasting holes are drilled and blasted from a side wall of a cavern along a designed inclined face of the rock table and perpendicular to the trend axis of the cavern for drilling hole blasting; and then horizontal smooth blasting of a straight side wall on the rock table is conducted, andthe blasting holes are horizontally drilled and blasted in the direction parallel to the excavation direction of the cavern for horizontal drilling hole blasting. According to the narrow rock wall crane beam excavation method, pre-splitting blasting is carried out on the inclined surface in advance, inclined surface cracks and turning points of a rock wall crane beam are formed in advance, the situation that horizontal smooth blasting must be adopted to tear and damage a rock mass when side wall vertical smooth blasting cannot be implemented can be avoided, rock table forming quality is improved, and meanwhile rock table rock mass quality is improved; and in addition, vertical holes and inclined holes do not need to be aligned one by one, and only the depth needs to be strictly controlled, so that the workload of surveying, setting-out and checking is reduced.
本发明公开了一种窄小岩壁吊车梁开挖方法。包括：完成洞室顶层开挖后自中间向两侧分区进行洞室岩壁吊车梁层开挖；首先开挖中槽区域，一次性进行两侧保护层剥离，支护完成后进行岩台斜面孔的预裂爆破开挖，爆破孔从洞室边墙沿岩台设计斜面、并垂直于洞室走向轴线钻孔爆破，再进行岩台上直边墙的水平光面爆破，爆破孔沿平行于洞室开挖方向水平钻孔爆破。本发明对斜面提前进行了预裂爆破，提前形成了岩壁吊车梁斜面裂缝和拐点，避免由于边墙竖向光面爆破无法实施时，必须采用水平光面爆破对岩体的撕裂破坏，提高岩台成型质量，同时改善岩台岩体质量。本发明竖向孔和斜向孔不必一一对位，只需严格控制深度即可，减少了测量放样校核的工作量。
Narrow rock wall crane beam excavation method
The invention discloses a narrow rock wall crane beam excavation method. The method comprises the steps that after excavation of a cavern top layer is completed, excavation of a cavern rock wall cranebeam layer is conducted in a partitioned mode from the middle to the two sides; firstly, a middle groove area is excavated, protective layers on the two sides are stripped at a time, and after supporting is completed, pre-splitting blasting excavation is conducted on inclined face holes of a rock table, and blasting holes are drilled and blasted from a side wall of a cavern along a designed inclined face of the rock table and perpendicular to the trend axis of the cavern for drilling hole blasting; and then horizontal smooth blasting of a straight side wall on the rock table is conducted, andthe blasting holes are horizontally drilled and blasted in the direction parallel to the excavation direction of the cavern for horizontal drilling hole blasting. According to the narrow rock wall crane beam excavation method, pre-splitting blasting is carried out on the inclined surface in advance, inclined surface cracks and turning points of a rock wall crane beam are formed in advance, the situation that horizontal smooth blasting must be adopted to tear and damage a rock mass when side wall vertical smooth blasting cannot be implemented can be avoided, rock table forming quality is improved, and meanwhile rock table rock mass quality is improved; and in addition, vertical holes and inclined holes do not need to be aligned one by one, and only the depth needs to be strictly controlled, so that the workload of surveying, setting-out and checking is reduced.
本发明公开了一种窄小岩壁吊车梁开挖方法。包括：完成洞室顶层开挖后自中间向两侧分区进行洞室岩壁吊车梁层开挖；首先开挖中槽区域，一次性进行两侧保护层剥离，支护完成后进行岩台斜面孔的预裂爆破开挖，爆破孔从洞室边墙沿岩台设计斜面、并垂直于洞室走向轴线钻孔爆破，再进行岩台上直边墙的水平光面爆破，爆破孔沿平行于洞室开挖方向水平钻孔爆破。本发明对斜面提前进行了预裂爆破，提前形成了岩壁吊车梁斜面裂缝和拐点，避免由于边墙竖向光面爆破无法实施时，必须采用水平光面爆破对岩体的撕裂破坏，提高岩台成型质量，同时改善岩台岩体质量。本发明竖向孔和斜向孔不必一一对位，只需严格控制深度即可，减少了测量放样校核的工作量。
Narrow rock wall crane beam excavation method
一种窄小岩壁吊车梁开挖方法
WANG JUN (Autor:in) / ZHANG DENGZHU (Autor:in) / WANG ZAIQIANG (Autor:in) / WANG QIANG (Autor:in) / ZHANG XUEBIN (Autor:in) / LIU ZHENGENG (Autor:in) / ZHANG XIN (Autor:in) / ZHENG YAO (Autor:in) / SONG ANRUI (Autor:in) / LI XIA (Autor:in)
05.06.2020
Patent
Elektronische Ressource
Chinesisch
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