日韩区一区二区三区四|交换国产精品视频一区|国产口爆吞精在线观视频|午夜无码大尺度福利视频|二区亚洲国产精品一区久久|精品国产一级二级三级在线|欧美日韩精品久久久免费观看|亚洲高清一区二区三区高清不卡

position: EnglishChannel  > InnovationChina> Percussion Drill: A Revolution in Salt Mining

Percussion Drill: A Revolution in Salt Mining

Source: Science and Technology Daily | 2023-07-13 10:03:04 | Author: BI?Weizi


A relatively complete set of ancient percussion drill tools are on display at the Zigong Salt History Museum, Zigong, Sichuan province. (PHOTO: VCG)

By?BI?Weizi

The percussion drill, a large type of rotary drill with an impact mechanism that produces a hammering motion, was invented by Chinese during the Eastern Han Dynasty.

Its invention is closely related to the mining of well salt. About 5,000 years ago, people in coastal China produced salt by boiling seawater. As high-density human settlements moved inland and became increasingly dependent on agriculture, salt --essential to human survival as an important food supplement and preservative --became a valuable commodity. With government funding and the profits of the salt industry, mining technologies improved over time.

About 2,000 years ago, instead of digging water wells by hand with shovels, people began to use percussion drilling systems. By the beginning of the third century, wells had been drilled to a depth of 140 meters. Using the lever principle, a few men stand on a plank lever that lifts the drill pipe about one meter. The drill pipe is lowered and the drill bit is driven into the rock, breaking it up. Centimeter by centimeter, the drilling progresses slowly.

In the third year of Daoguang (1835) in the Qing dynasty, a 1,001.42-meter deep well was drilled in Zigong, the "Salt Capital," which was the deepest drilled well in the world at that time. The technical advantages of deep percussion drilling not only promoted the formation of resources and industrial advantages in Sichuan, Yunnan and other places, but also directly expanded people's understanding and utilization of salt resources in other parts of the world. This technology then spread to the West, and was later combined with the steam engine for mineral exploration worldwide in the 19th century.

Editor:畢煒梓

Top News

  • ?China has been harnessing the power of technology to create synergy between traditional culture and modern digital innovation. It is a journey promoting the development of both cultural undertakings and the cultural industry, emphasizing the dual engine of cultural projects and the cultural industry to boost the nation's cultural soft power.

Updated Archaeology Makes Past Meet Present

?Recent archaeological discoveries across China are reshaping people's understanding of the nation's ancient history, leveraging cutting-edge scientific technology to uncover the roots of Chinese civilization. From human evolution to agricultural revolutions, these breakthroughs are shedding new light on China's extensive cultural and historical legacy.

Revival of Cultural Heritage Preservation

In recent years, China has made remarkable strides in leveraging cutting-edge technologies to safeguard its rich cultural heritage. From the ancient Great Wall to priceless artifacts from the rich Sanxingdui archaeological site, a major Bronze Age culture, advancements in scientific research are redefining the way historical treasures are protected, preserved and passed down to future generations.

抱歉,您使用的瀏覽器版本過低或開啟了瀏覽器兼容模式,這會影響您正常瀏覽本網(wǎng)頁

您可以進行以下操作:

1.將瀏覽器切換回極速模式

2.點擊下面圖標升級或更換您的瀏覽器

3.暫不升級,繼續(xù)瀏覽

繼續(xù)瀏覽