论文部分内容阅读
在地質勘探过程中,为了揭露矿体,探明矿床的产狀和質量或为解决施工中的通风問題等,常开掘天井。因此,如何提高天井掘进效率,加快掘进速度,也是探矿工程中的一个重要問題。兩年来我队共施工了90余个天井,通过在实际工作中的不断試驗研究,在天井掘进中推广了直線爆破,获得了良好的效果。一、天井掘进的基本条件地質岩石条件为矽化、白云石化的石灰岩,中等硬度,成层狀为缓傾斜,节理发达,部份岩石多孔有晶硐。天井掘进的断面是随着天井开掘的高度而有所
In the process of geological exploration, in order to expose the ore body, to ascertain the appearance and quality of the ore deposit or to solve the ventilation problems during construction, the pothole is often excavated. Therefore, how to improve the efficiency of tunneling and speeding up the excavation is also an important issue in prospecting engineering. Over the past two years, our team has constructed more than 90 pavements. Through continuous experimental research in practical work, we have popularized the straight-line blasting in the tunneling and achieved good results. First, the basic conditions of the tunnel boring Geological rock conditions for the silicification, dolomitization of limestone, moderate hardness, stratification for the gentle incline, developed joints, part of the rock porous cave. The cross-section of the tunnel boring is the height of the patio