blasting drift

常见例句

The construction practice indicated that the blasting efficiency in drift was improved and good economic benefits were obtained by the adoption of single helix cutting mode.
实践表明，采用单螺旋掏槽方式提高了平巷掘进爆破效率，取得了良好的经济效益。
Regarding the low blasting efficiency in the excavation of drift in one iron deposit, the paper taken the cutting method and blasting parameters as the main influencing factors;
针对某铁矿水平巷道掘进爆破效率较低的问题，确定了掏槽方式和爆破参数是其主要影响因素。
This paper introduces driving rock drift with minor diameter bit, minor diameter cartridage and minor diameter bolt, it can realize smooth blasting, roadway speed is raised, driving cost is reduced.
在岩巷掘进过程中使用小直经钻尖，小直径药卷和小直径锚杆，可实现光面爆破，有效提高成巷建设，降低掘进成本。