This Friday, the most active iron ore contract on the Dalian Commodity Exchange fell by about 10% compared to last week, marking the largest weekly decline since February 2020. It is currently down 17% from the record high reached in May.

The China Steel Structure Association's Drill Steel and Tools Subcommittee held a review meeting for the group standard "Connecting Rod Drill Bits for Rock Drilling Machines" on July 12-13, 2021, in Qianjiang City, Hubei Province. A total of 17 participants attended, including members from the main drafting unit, participating units, and expert group members.

On July 9, Zijin Mining held a meeting of the Board of Directors' Strategy and Sustainability (ESG) Committee to conduct a special study on how to implement the group's strategic goals under the framework of "carbon peak and carbon neutrality." It was proposed that while developing resources, the company should increase research and investment in new energy and new materials to find new growth points for sustainable development.

The full hydraulic tunneling and rock drilling rig is mainly used for tunnel excavation and underground blasting construction projects. This series of drilling rigs uses rubber tires for mobility and a diesel engine as the power system for the entire vehicle. Depending on different construction conditions, various models of drill arms, thrust arms, and rock drilling rods of different lengths are selected for the tunneling drilling rig. Currently, the most widely used full hydraulic tunneling and rock drilling rigs in both domestic and international markets are the Boomer series drilling rigs produced by Atlas Copco.

Mineral resource exploration is considered a high-risk investment activity. The characteristics of the industry include: long cycles, high risks, and high returns. According to statistics from authoritative institutions, the average investment cycle for mineral resource projects is 17 years, with an average success rate of 3-5%.

All employees of Ruikelaiming Technology warmly celebrate the 100th anniversary of the founding of the Communist Party of China.

In his congratulatory letter, Xi Jinping pointed out that the Baihetan Hydropower Station is a major national project for implementing the "West-to-East Power Transmission" initiative, and it is currently the largest and most technically challenging hydropower project under construction in the world. The project features the world's largest single-unit capacity hydropower generator set with a power output of one million kilowatts, marking a significant breakthrough in China's high-end equipment manufacturing. All builders and contributors have demonstrated a spirit of striving for excellence, climbing to new heights, and selfless dedication, working together to overcome difficulties and contribute to the construction of this major national project. This fully illustrates that socialism is achieved through hard work, and the new era is created through struggle.

In the late 1940s, with the rapid development of pneumatic rock drilling machinery, the efficiency of drilling production continued to improve. However, to increase the output power of the drilling machinery, it was necessary to increase the piston diameter, which also led to an increase in the weight of the drilling machinery. Some rock drilling machines that were completely operated manually have become inadequate.