2021-12-09
On December 3, the China-Laos railway connecting Kunming and Vientiane, Laos, was officially opened to traffic. The line starts from Kunming, China in the north, passes through Yuxi City, Pu'er City and Xishuangbanna Dai Autonomous Prefecture in the south, and then passes through China's Mohan port to Vientiane, the capital of Laos, with a total length of 1035 kilometers and a total investment of 50.545 billion yuan.
Mechanical cutting drilling tools-trenchless drilling tools
2021-12-02
Trenchless engineering drilling tools. Trenchless construction technology is a new technology for underground engineering construction, which has been applied in China's engineering construction for less than 10 years. Because this technology can carry out drilling operations without digging the surface, it does not affect traffic, does not damage the environment, and has a short construction period, so it is widely used in municipal engineering and underground pipeline laying projects such as rivers, railways, highways and airports.
2021-12-02
On December 1, the Ministry of Ecology and Environment officially issued a document, and the second round of the fifth batch of central ecological environmental protection inspectors was fully launched. The four central ecological and environmental protection inspection teams carried out one-month inspections in four provinces (regions) of Heilongjiang, Guizhou, Shaanxi, and Ningxia.
2021-11-16
Recently, Nyrstar, the world's largest zinc smelter, announced that European refineries would cut production by up to 50%, stimulating global zinc prices to soar. London zinc prices rose by more than 20% a week, directly setting a record for the largest weekly increase in history and a 14-year high since 2007.
Reverse patio rock drilling tool
2021-11-16
Domestic underground metal mine shaft construction is mainly based on drilling and blasting method. In recent years, with the progress and development of roadway non-destructive mechanized tunneling technology and equipment, reverse patio drilling rig has begun to be applied in some large underground metal mines. In the underground metal mine shaft excavation, the use of the construction method of the patio drilling rig has a series of advantages such as fast excavation speed, low labor intensity, no damage to the original integrity and stability of the roadway rock, the shaft wall is rounded, the well quality is good and conducive to ground pressure control, it is an advanced construction method of underground mine shaft excavation. In our country, with the technological progress of the mining industry, the reverse patio drilling in the shaft drilling construction has
What is mining tooth wheel drilling tool
2021-11-08
Mining tooth wheel drilling tools are mainly used for vertical perforation operations in large open-pit mines, earth and rock drilling, water wells and geothermal wells. During the drilling process, the tooth wheel drilling machine drives the rotary motion of the tooth wheel drill bit through the drill rod, and at the same time exerts a downward thrust for the drilling tool to drill the hole. Under the action of rotating force, the tooth wheel drill drives three teeth inlaid with hard alloy teeth or steel teeth to rotate around their respective claw journals. At the same time, under the action of axial thrust, the alloy teeth or steel teeth are embedded into the surface of the rock, and the rock is broken by the alternating composite force of extrusion and shear, so as to achieve the purpose of perforation.
Pay attention to lotus mountain drilling tools:
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