Original Title Finding Water and Drilling Wells for Poverty Alleviation in Southern Jiangxi Case Analysis and Process Record (Part II) Part 1 Indoor comprehensive research and judgment accurate well determination in the field Click to Read Gannan Poverty Alleviation Water Search and Well Drilling Case Analysis Process Record (Part I) Part 2 Fast drilling verification and intelligent water pumping First rapid fastest dth hammer drilling verification chopsticks inserted tofu 201718 Sunny Sunday At the foot of Yangshan Mountain the national flag rises in the west of Xixia Village At 1658 the first well (xgzk1) in Xingguo County Gannan Poverty Alleviation and Water Exploration of Shuihuan Center was drilled with a designed hole depth of 120 m Expand the full text At 18 o'clock the footage was 75m the loose layer was penetrated the bedrock was entered and the 325mm retaining pipe was lowered for 8m In the morning go to the construction site and make disclosure with the second drilling team At 430 in the afternoon the drilling rig was ready At 1700 the drilling was spudded The bedrock was found at 75m and the 8m long 325mm steel retaining pipe was lowered The drilling speed is so fast Photo 23 24 Open the first drill and the machine is roaring Implementation of hydrogeological drilling 1 Device configuration Drilling rig model SL-800 A crawler power head drilling rig Type of derrick mast type Power machine type diesel engine Other equipment DWQ1200 XXH air compressor submersible pump ultrasonic flowmeter 50 kw generator set automatic recorder for pumping test etc 2 Drilling technology and drilling parameters (1) Drilling process Pneumatic Dth hammer is used to drill XGZK01 hole Ф350mm Dth hammer bit + TH10 impactor + 114 drill pipe is used for opening Ф305mm Dth hammer bit + TH8 impactor + 114 drill pipe is used after reducing reducing depth is 750 m and final hole depth is 12000 m (2) Drilling parameters Pneumatic Dth hammer is used for full drilling with positive circulation The technical parameters are as follows ① Air volume 34m 3/min ② Wind pressure 33 MPa ③ Weight on bit 16-18k N ④ Speed 20 ~ 50r/min 3 Coring One rock debris sample is taken every 45m in the whole hole and 35 rock debris samples are taken in total The cores taken shall be arranged in turn filled in and labeled in time and recorded by hydrogeologists in time In the process of logging in addition to the description according to the general hydrogeological requirements the geologists have made a detailed study and description of the physical properties of the rock strata In particular the minerals in the rock formation are described in detail such as the main mineral components and their contents sand clay powder and organic matter contents For down the hole bit sandy and gravelly soil the contents of sand and gravel are distinguished and the roundness of gravel is described; for clayey soil the color natural state clay powder content and water content of the sample are described In addition the rock strata exposed by drilling are described and divided in detail to determine the lithology of aquifer aquiclude and basement 201719
Down-the-hole hammer drilling technology is powerful the second team of brothers are capable and able to bear hardships cattle! Hole 1 1555m dth drilling hammer 0-75m loose layer 75-129m Cretaceous argillaceous sandstone 129-1555m tectonic zone and granite The drilling was spudded at 1658 on January 8 stopped after the bedrock was seen and the 8m retaining pipe was run in and finished at 1800; the drilling was started at 800 on January 9 and completed at 1830; the drilling time was 115 hours Hole 2 1355m 0-4m loose layer 4-84m Cretaceous glutenite 84-1355m tectonic zone and granite The lithium ion content of groundwater in XGZK02 hole also reached the standard of mineral water but the content of individual ions exceeded the standard In June 2017 the XGZK04 hole was drilled at the location of Line VI before the Spring Festival with a depth of 1215m a drilling diameter of 305 mm a well pipe diameter of 219 mm a buried depth of static water level of 1191 m a water stop position of 0-6542 m and an actual water yield of 2125 m 3/d Water supply projects including water storage tanks purification equipment water supply equipment installation and laying of main water pipelines have been completed and handed over to local governments for use in the near future Popular science articles are compiled into the book "Protecting the Earth Wonderful Geology" Excellent Popular Science Works Water Environment Center of China Geological Survey Zhang Fucun's Geological WeChat Selection (Click on the link to read) Return to Sohu to see more Responsible Editor wt-dthtools.com
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