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Interstate 80 eastbound, at Gold Run, California. Elevation 3800'
This isn't a particularly pretty picture, but it's got some nerdly geological/historical virtues...
The town of Gold Run, in the Sierra Nevada foothills, is so named because the town was once a popular location for hydraulic gold mining -- a mid-nineteenth century technology that basically involved aiming giant water cannons at local mountains to turn the hills into liquid. By filtering the water/mud mixture created in the process, miners were able to gather gold. These photos show how it was done, back in the day. (Scroll down for a photo that was actually taken in Gold Run).
As you can imagine, hydraulic mining was a big mess. As entire mountains were reduced to liquid goo, the muddy runoff flowed through Sacramento and all the way into San Francisco Bay, fouling everything in its path and reducing the draft on navigable waterways. For these reasons, hydraulic mining was banned in 1884.
All of which is today... the sandy escarpment visible on the left is a remnant of the hydraulic mining days. The exposed cross-section hints at why the technology was ideal for excavating the local terrain (the hills here are composed of compacted sand and gravel). It also shows also how destructive the process must have been.
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Many have came to Alaska looking for riches from below. Some succeeded and other went bust! When the gold ran out, so did the miners. Leaving equipment behind. It cost to much to move it. Just let the land and time take care of it.
This is in the area of Hatchers Pass Alaska, about 28 miles off the main road on the Willow side.
Brass petrological microscope made by J Swift & Son London.
Dates in use: late 19th - early 20th Century. Brass with black painted stage and base. Original Nicol prisms.
Mining has been more or less forbidden in the Canaima National Park, and this is the remnants of a gold mine right smack in the middle of some rainforest.
After the logging the area, they basically flood the area and perform surface mining.
Illegal mining still goes on in Canaima National Park, but decreasing due to an increased military presence.
A delegation of 21 British companies from the Construction Equipment Association travelled to Antofagasta to exhibit their products and services at Exponor Mining Exhibition held in the northern city Antofagasta between 11 and 15 May 2015.
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www.millexpo.com/case/locality/africa/
Africa crushing, grinding, mining projects
SBM has realized crushing and grinding projects of industrial and mining minerals processing in different African countries, including Congo, Guinea, Kenya, Niger, South-Africa, Zambia etc.
The mining workers of the sand-lime brick mines near Valkenburg (NL) made map, painted on the wall, showing the caves going through the ground in 300-400 metres depth.
Well, also with the map, you don't have any orientation. Feary.
This photo has been edited with Photoshop to brighten the map in the background, not direclty affected by the candle light in the front.
The work-horse of mining theodolites in 1940's/50's - reading directly to 20 seconds of arc. Complete with mahogany case this instrument was very heavy to cart a couple of miles underground.
These instruments were invariably finished in the colour grey - for a short history and photos of CTS www.landsurveyinghistory.ab.ca/Equipment/Cooke_Troughton_...
Coal mining on the southern side of Macclesfield Common was concentrated around Blakelow via a number of shafts to the north-east of the current boundary of Macclesfield Golf Club. The Macclesfield Copper Company leased the Blakelow workings in the later eighteenth century and was extracting the coal from the two Holcombe Brook Seams using pillar and stall workings drained by a sough driven from lower down the hill towards Macclesfield town. The seams were thin and sometimes less than 2ft thick, but the quality was good enough to make it worthwhile extracting them.
In this view over the town the remains of the northern shaft of Blakelow Colliery can be seen on the lower left with two trees growing out of the spoil mound.
Landsat satellite image of open-pit uranium mining in central Wyoming's Gas Hills, taken on September 3, 2000. Panoramic view looking west. Image prepared by SkyTruth (www.skytruth.org).
In July 1985, the tailings dam of the Prestavel fluorite mine in northern Italy collapsed, causing the deaths of 268 people. Since the end of World War II the mine had a number of owners, but from 1980 to the time of the dam collapse, it was managed by Prealpi Mineraria. The mine tailings had been stored in two upstream cascading dams, built on a small tributary of the Stava Creek. Around lunch time on a summerās day, the upper dam collapsed without warning onto the lower dam, which subsequently also collapsed. Approximately 180 000 cubic metres of semi-fluid tailings were released, burying the downstream villages of Stava and Tesero.
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This photo has been graciously provided to be used in the GRID-Arendal resources library by: Kristina Thygesen
Messingham, 05-09-21, a further selection! - Hopefully right on this one but not sure - a Mining Bee.....
Kembali digelarnya event "The Second Kalimantan Mining, Oil & Gas 2010 Exhibition" yang diadakan di Gedung DOME, Balikpapan 19 - 21 Mei 2010 ini, menandakan minat yang tinggi terhadap event sejenis yang diadakan setahun sekali ini. Selain pameran, pengunjung juga dapat mengikuti seminar, workshop dan fun golf competition. Tercatat ada lebih dari 30 perusahaan yang bergerak di bidang tambang, migas, safety dan kontraktor yang mengikuti event ini.
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So 3 of us off we set this year on New Years Eve, to do one of the Coniston Copper Mines through trips. Enter the old mine workings near Levers Water by The Funnel and then descend about 160 metres through 4 separate levels of old workings to finally emerge back to day at Hospital Level. The main cunning plan was not to see the New Year in still in the Copper Mines.
A delegation of 21 British companies from the Construction Equipment Association travelled to Antofagasta to exhibit their products and services at Exponor Mining Exhibition held in the northern city Antofagasta between 11 and 15 May 2015.
Gauges from a Wabco mining truck on static display. Notice the hour metre has rolled all the way over.
Coal and other natural resources are mined to be used to generate power. Here we see mining equipment at a coal mine in North Dakota.
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Closeup look at part of the in-situ uranium mine facilities. Note apparent dump on the right, with what appear to be unlined, open ponds and trenches full of water or other liquids (difficult to say with certainty using this imagery). Google Earth users: download the KMZ file here: skytruth.mediatools.org/objects/view.acs?object_id=11801.
ZLJ650 Coal Mining Equipment is mainly designed to drill hole for water detection, gas detection and drainage hole, water injection and geological structure in different angle. Mechanical driving and hydraulic feeding is adopted. It is featured with compact structure, light weight and convenient maintenance, etc.
Features:
Multi-purpose drill rig
Gas detection and drainage drill rig
0-360 degree full section drilling
Simple and compact structure
User-friendly to operate and transport
Specification:
1.Working Pressure: 8MPa
2.Rated Torque: 650Nm
3.Rated Rotation Speed: 90rpm
4.Rated Flux: 12L/min
5.Max. Feeding Force: 15kN
6.Max. Pulling Force: 24kN
7.Pushing Stroke: 400mm
8.Drilling Angel: 0-360 degree
9.Drill Rod Diameter: 42/50mm
10.Winch Lifting Capacity: 10.8kN
11.Wire Barrel Capacity: 30m
12.Wire Diameter: 9mm
13.Rinsing Water Pressure: 0.6-1.2MPa
14.Motor Model: YBK2-160M-4
15.Motor Power: 11kW
16.Motor Voltage: 380/660/1140V
17.Rated Motor Current: 22.3/12.88/7.44A
18.Dimension (L*W*H): 1400*735*1400mm
19.Weight: 720kg
Application:
Use to drill big diameter blast hole, geological exploration hole, gas detection and drainage hole, water infusion hole, pressure discharging hole, etc in underground coal industry.