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🎉 And the 'Guess the Engine House' Winner for November is: Laurie Hassall!🎉 Laurie was straight on the case in correctly identifying this Cornish Engine House is actually found at the Snailbeach lead mine in Shropshire. Like many lead mines in the Stiperstones/Shelve orefield southwest of Shrewsbury, Snailbeach mine claims a history stretching back to the Roman period due to the discovery of artefacts in later workings, however contemporary evidence of working at the site begins in 1676. The fame and national reputation for the mine dates however to 1783 when the Snailbeach Company was established on what proved to be a fabulously rich and consistent vein, paying handsome returns almost from the start. By the 1850's the mine was at peak production, producing c. 3,500 tons of ore annually when Stephen Eddy, and then his son James Ray Eddy were appointed to modernise the mine, which included the re-fitting of the dressing floor and replacing the system of cumbersome flatrods attached to a waterwheel then used for drainage with a dedicated shaft, named after the hill it was sunk through (Lordshill) and accompanying engine house equipped with a 60" (1.52m) diameter Cornish beam engine, reportedly completed by 1858. This work reportedly led to a 'tenfold' increase in profits, and as such probably encouraged later re-equipping of the mine in 1870's albeit this was poorly timed; coinciding with reduced lead prices which led to the mine making its first ever loss in 1884 and further underground exploration was abandoned in 1895 with the defined 'reserves' then being depleted and production falling to 200 tons in 1905 before a 'last hurrah' of 1,000 tons produced in 1910 prior to the engine at Lordshill being stopped in 1911. Minor production from Barytes was undertaken between the wars and dumps were worked for material to pebble dash houses in the latter part of the 20th century, but no further underground exploitation was undertaken after 1955. The site was then left to become derelict before being acquired by Shropshire County Council who undertook critical stabilisation works in the 1990's. The site is now managed by the Shropshire Mines Trust who have done an excellent job curating the site which is open for visitors, including underground tours on select days. The site is a scheduled Monument and the Engine House is Grade II listed.

Great video show casing the granite mining process from beginning to end. More info below 👇

Point checking during excavation process on construction of Monopole Electric Line at Geita Gold Mine.

Planar failure surfaces usually occur in slopes with a thin layer of soil that has relatively low strength compared to the overlying materials. Additionally, this is the preferred mode of failure for jointed materials that may dip toward proposed excavations. A planar failure surface can be readily analyzed with a closed-form solution that depends on the slope geometry and the shear strength parameters of the soil along the failure plane (Abramson et al., 2002). In a triangular fill on a sloping surface, it is assumed that the failure plane is along the bottom of the fill. Good examples of this type of failure are the spoil banks created by surface mining, where the original ground surface is not properly scalped, and a weak layer exists at the bottom of the fill (Huang, 2014).

Excavators are versatile, heavy-duty machines used to move large objects, such as soil and other materials around our planet. Used extensively in mining, road and LIEBHERR R9800 escavatore ruspa più grande al mondo Liebherr R9800, the world's largest excavator. It is manufactured in Germany and is designed to perform large-scale mining work. Its measurements are: Length 23.9m - Width 10.5m - Height 11.7m. Its operating weight is 800 tons, it is powered by two 4,000 horsepower engines in total with 16-V cylinders that allow it to reach a top speed of 2.6 km/h and its tank can hold 17,500 liters. The bucket has a capacity of 45 m³ and can dig to a maximum depth of 9 meters, while the lifting capacity is 150 tons. It is designed to carry out all maintenance work conveniently, quickly and safely. It is also equipped with a system with several service lights placed in strategic points in order to ensure optimal visibility in all weather conditions. #excavator #heavy_duty #geotechnical #geotechnical_engineering #site_work #mining #civil_engineering

Road headers are versatile machines designed to excavate a wide range of rock strengths. They can handle various types of rock, including soft, medium, and hard rock formations. Soft rocks like shale and clay are typically easier to excavate with a road header due to their lower strength and cohesive properties. Medium-strength rocks such as limestone and sandstone are also within the capabilities of a road header. Even hard rocks like granite and basalt, though more challenging, can be excavated using specialised cutting tools and techniques employed by road headers. For hard rocks, usually other techniques such as drill and blast are more efficient compared with the road header excavation method. The machine's cutting head and power system are engineered to tackle different rock strengths, making it a valuable asset in tunnelling and underground mining operations across a spectrum of geological conditions. We have covered all tunnelling techniques in our Online Tunnel Engineering course. Click the below or in bio. https://lnkd.in/ePXRpUk5 Follow us at Tunnel Engineering Photo credit and special thanks to (Instagram misky306) #Roadheader #TunnellingCourse #tunnelcourse #civilengineeringcourse #miningcourse #engineeringcourse #tunneleducation #tunnellingpage #tunelfuturistico #tunelizacion #tunelfuturistico #مهندسی_عمران #tunnelengineering #artoftunnelling #tunnel #tunnelengineeringisthefuture #tunnel #tunnelling #tunneling #tunel #civilengineering #miningengineering #knowledge #learntunnelling #tunnelphoto #geotechnicalengineering #geologist #undergroundconstruction #undergroundspace

🔗💻🔎 https://lnkd.in/dbe5CE_S 🧑📖 Assessing the stability of protective structures in preparatory mining workings under conditions of static load 👨⚖️ 🏫 ©️ Daria Chepiga, Serhii Podkopaiev, Oleksiy Kayun, Anatolii Bielikov, Yevgen Podkopayev, Oleksandr Kipko, Olha Pidhurna (Donetsk National Technical University, Ukraine) Keywords: #coal #massif, #preparatory #workings, #protective #structures, #lateral #rocks, #static #load Abstract The object of this study is the deformation processes in protective structures under the action of static load in the coal massif in order to preserve the integrity of the side rocks and the operational condition of mine workings. Under laboratory conditions, the deformation characteristics of rigid and flexible protective structures, as well as supports made of crushed rock, were studied on experimental samples. The samples were subjected to uniaxial compression. It was established that there is a functional relationship between the coefficient of transverse deformation ν and the relative change in the volume δV of protection structures, which makes it possible to estimate their bearing capacity. For rigid protection structures (coal pillars, cast strip, cement blocks, blocks of reinforced concrete bollards, bundles of wooden racks), the deformed state of the structures determines their behavior. This happens at values of ν=0.3–0.5 and δV£0.09. Their stability is fixed within the safe deformation resource. An increase in the deformation energy density of such structures beyond the safe deformation resource leads to their destruction due to a change in shape. For flexible protection structures (bundles of wooden racks, rolling bundles made of wooden sleepers), which have a transverse deformation coefficient ν=0.02, at a relative change in volume δV£0.3, the compaction of structures is observed. Increasing their stiffness allows limiting the convergence of side rocks. For a support made of crushed rock, at ν=0.25–0.32 and a relative volume change of 0.12£δV£0.32, its compaction and increase in resistance occur. Under such conditions, the convergence of side rocks is limited. In order to preserve the integrity of the lateral and operational condition of preparatory workings in the excavation areas of coal mines, it is advisable to use flexible protective structures made of wood or supports made of crushed rock.

ORIGIN, OCCURRENCE AND MINING OF POZZOLANIC MATERIALS. Natural Pozzolana can be classified under sedimentary and igneous origin.Natural Pozzolans of igneous origin includes scoria and Pumice and scoria. >> Pumice is a natural material of volcanic origin produced by the release of gases during the solidification of acidic lavas such as of Rhyolite or Dacite composition (60 -70% SiO2).It is light colored, cellular, almost frothy rock made up of glass-walled bubble casts, as it may occur as coherent massive blocks composed of highly vesicular glassy lava in either a flow or vent filling; or it may be more or less fragmented by violent eruption. >> Scoria is a vesicular glassy lava rock of Basaltic to Andesitic composition (40 - 60 % SiO2) ejected from a volcanic vent during explosive eruption.Scoria is typically dark gray to black in color, mostly due to its high iron content. >>Conventional method of mining (open cast) are being used for the generation Of pozzolona and handling of overburden right from the top of the cone. HEMMs are deployed directly without blasting the materials since pozzolans are loose and very soft. As such, mining begins from the top and material is pushed down for dispatch. >>The generation of pozzolona is done in 3 stages: * Overburden removal where the non mineralized soil layer is removed with the use of An HEMM in order to access the deposit. * Material Excavation where the material is dislodged rendering them loose and free for transportation to a cement plant.This is often done using excavator and buldozer. * Loading and haulage of pozzolana .This is done after excavation and or mixing, the wheel loader loads the trucks with pozzolona for dispatch to the plant. >> Pumice and scoria also acts as an aggregate in lightweight building blocks and assorted building products,. In Europe, Pozzolanic material was used in ancient Rome over 2000 years ago and many structures are still standing today. Did you find this piece of Information useful? Any questions? I'll be in the comment section 😊 Happy International Women's Engineering Day🌞 #WomenInMining #Cameroon

Everybody loves a site with a good view! And you would be forgiven for thinking that the site was a simple build. However, even idyllic parts of Cornwall can be spoiled by the legacy of historical metalliferous mining. On this site, we were undertaking a site strip to establish whether there were any unrecorded mining features on the plot, before we enabled a family to build their dream family home! #lovemyjob #cornwall #cornwallgeology #specialistsiteinvetsigation #siteinvestigationcornwall #siteinvestigation #groundinvestigation #sitestrip #geotechnicalengineer #geotechnicalengineercornwall #stmichaelsmount #mountsbay #penzance #selfbuild

Minerals offer such beauty and a variety of applications. Most of it is bringing jobs and value to the local economy.