Underground mining

Xem 1-4 trên 4 kết quả Underground mining

Numerical investigation on the tunneling and mining induced geo-hazards: Case study in Quang Ninh, Vietnam

This article presents a number of specific analysis cases, taking into account geological conditions and boundary conditions, and from that, raising a number of issues to note when using numerical methods.

8p vifilm 24-09-2024 5 1 Download

Summary of PhD thesis Mechanics gynamics engineering: Study on the effects of some factors on longevity of cutting teeth on the drum of shearer used in underground coal mining in Quang Ninh area

Studying, analyzing and evaluating the basic factors affecting the wear resistance of the shear cutting drum, such as coal strength, the geometry of the cutting teeth, materials of cutting teeth, the cutting angle. Cutting depth, cutting feed and cutting speed are the basis for selecting the appropriate factors in fabrication, using the cutting teeth of the shearer.

27p closefriend09 16-11-2021 20 2 Download

Summary of Doctor thesis: Research on improving economic - Technical efficiency of prop equipment using in underground coal mining in Quang Ninh area

Building basis of science and reality for economic - technical efficiency of PE using solutions in CM in Quang Ninh area, to make contribution to increase efficiency of coal production and coal business.

27p cothumenhmong6 17-07-2020 35 4 Download
QCVN 05:2012/BCT

QUY CHUẨN KỸ THUẬT QUỐC GIA QCVN 05:2012/BCT VỀ THUỐC NỔ NHŨ TƯƠNG DÙNG CHO MỎ HẦM LÒ, CÔNG TRÌNH NGẦM KHÔNG CÓ KHÍ VÀ BỤI NỔ National technical Standards and Regulations of Emulsion explosives for blasting in underground mines without detonation gas and dust Lời nói đầu QCVN 05:2012/BCT do Vụ Khoa học và Công nghệ soạn thảo, trình duyệt; Bộ Khoa học và Công nghệ thẩm định; Bộ Công Thương ban hành kèm theo Thông tư số 14/2012/TT-BCT ngày 12 tháng 6 năm 2012. ...

4p waduroi 15-11-2012 105 6 Download