排序方式: 共有8条查询结果,搜索用时 15 毫秒
1
1.
根据河南灵宝市小秦岭金矿深部探矿项目的实际情况,保证《安全规程》的要求,确定深部探矿井巷的规格,以期达到掘进成本低、效率高、运输能力有保障的目的。 相似文献
2.
3.
4.
5.
6.
The purpose of this study was to investigate the interacting mechanism between the saltating particles near a channel bed. A three-dimensional real-time flow visualization technique was developed to measure the interparticle collision behaviors during the saltating process. Based on the experimental data, the distribution of the collision points was found to be symmetric. This confirms the assumption that the projections of the collision points onto the reasonable plane are uniformly distributed. A three-dimensional saltating model was also developed. This model produced satisfactory results. The model is able to simulate the continuous saltating trajectories of several particles. The simulated dimensionless saltating height, longitudinal and vertical saltation velocity components were found to increase as the dimensionless particle diameter and the dimensionless flow transport capacity parameter increase, while the simulated lateral saltation velocity component varies inversely with the dimensionless flow transport capacity parameter. A regression equation for the bed load transport rate was also obtained. 相似文献
7.
8.
李明武同志作为主要骨干设计人参加了国家重点项目兖州矿区井型最大、最后开工建设的特大型现代化矿井——东滩矿井(井型4.00Mt/a)的采区设计和长时间担任现场施工代表。矿井设计特点和创新:1、加大采区尺寸利于机械化程度和生产能力提高;2、原煤系统运输能力大,为矿井高产、连续生产创造了先决条件;3、生产合理集中,减人提效。节省投资,缩短工期;4、改革采区巷道布置,减少矿片工程量。矿井投产后,产量稳步增长, 相似文献
1