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Effects of solid backfilling on overburden strata movement

The gangue is produced in excavating roadway and mining coal seam Compared with other backfilling materials the gangue was easy to obtain and the gangue hillock causes some safety problems such as spontaneous combustion exploding and contaminating soil (Huang 2001 Fan et al 2010 ) Get price


Glossary of Mining Terms

Placer - A deposit of sand and gravel containing valuable metals such as gold tin or diamonds Plant - A building or group of buildings in which a process or function is carried out at a mine site it will include warehouses hoisting equipment compressors maintenance shops offices and the mill or concentrator Get price



In mining gangue is the oft commercially worthless material that surrounds or is closely mixed with a wanted mineral in an ore deposit It is thus distinct from overburden which is the waste rock or materials overlying an ore or mineral body that are displaced during mining without beingGet price



Gangue In mining gangue ( /ɡŋ/) is the commercially worthless material that surrounds or is closely mixed with a wanted mineral in an ore deposit It is thus distinct from overburden which is the waste rock or materials overlying an ore or mineral body that are displaced during mining without being processed and from tailings Get price


overburden in nickel mining

overburden and gangue in mining paintballenfant Overburden is the term used in mining and archaeology to Overburden is the term used in mining and archaeology to describe material that lies above the area of economic or scientific interest e g the rock soil and ecosystem that lies above the Get price


Survey on roof movement of the gangue backfill working

Therefore it can be inferred that the overburden structure of gangue filling mining for the 1302N-1 working face is shown in Fig 6 in which the direct top thickness is 2 87 m and the basic top width is 2 56 m respectively 3 1 times and 2 7 times of the equivalent mining height Get price



Open-pit open-cast or open cut mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow This form of mining differs from extractive methods that require tunnelling into the earth such as long wall mining Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface It is applied to ore or rocks found at the Get price



Overburden is the natural rock and soil that sits above and around the ore body It is not subject to any chemical processes at the mine but needs to be removed to allow access to the ore For every tonne of ore we mine there are around seven tonnes of overburden which are moved to an area called the Overburden Emplacement Facility (OEF) or waste rock pile Get price


In situ investigation into fracture and subsidence of

In order to understand the controlling effect of filling body a detection scheme with three direction boreholes was designed in the tailgate of T 3 290 mining face in Tangshan Coal Mine to monitor the fracture developing process of overburden strata In addition a few displacement and stress sensors used for monitoring the roof subsidence and filling body stress were arranged behind the longwall face Get price


110 Different Types of Mining Operations and Mines

Longwall Mining The block of coal being mined which is called the longwall panel is normally approximately 270 to 430 yards in width and two to three miles in length Before longwall mining begins gate roads are driven to the back of each panel called the main gate or headgate and the tailgate Get price



In mining gangue is the commercially worthless material that surrounds or is closely mixed with a wanted mineral in an ore deposit It is thus distinct from overburden which is the waste rock or materials overlying an ore or mineral body that are displaced during mining without being processed Get price



Open-pit mining is a type of strip mining in which the ore deposit extends very deep in the ground necessitating the removal of layer upon layer of overburden and ore In many cases logging of trees and clear-cutting or burning of vegetation above the ore deposit may precede removal of the overburden Get price


Mine Waste Transfer and Disposal Methods

Overburden - Gangue - Tailings Overburden Waste rock or overburden refers to the often large mass of initial soil and rock that is removed in order to get to the valuable mineral deposits in mining operations Typically for every ton of ore that is mined 5 tons of overburden must be displaced Get price


Chapter 15 Flashcards

Tailing- the waste product when the ganue is removed Overburden- excess topsoil that has to be removed Ganue - Spoil - in surface mining gigantic mechanized equipment strips away the overburden of soil and rock and usually discards it as waste material called spoils (crap oil)Get price


Control Mechanism of Surface Subsidence and Overburden

ontrol Mechanism of Surface Subsidence and Overburden Movement in Backfilling Mining based on Laminated Plate Theory Zhengzheng Cao 1 Feng Du 2 3 4 Ping Xu 1 Haixiao Lin 1 Yi Xue 3 Yuejin Zhou 3 Abstract The backfilling mining technology is a type of high-efficiency coal miningGet price


Mine Tailings Disposal Methods

Overburden Overburden is generated by surface mining activities These include quarrying open-pit open-cut opencast stripping placering and dredging operations Overburden may be composed of soil sand clay gravel boulders rock and combinations thereof as these materials are removed to Get price


Mining Industry Profile Copper

Mining Industry Profile Copper 1-76 Some discharges from mine sites do not meet the traditional definition of a point source discharge Specifically diffuse runoff from tailings piles overburden waste rock piles ore and sub-ore piles and other mine areas often is not controlled through a Get price


Topic 5 Mining Methods

Nov 02 2011Mineral Extraction • Surface Mining overburden (soil and rock on top of ore) is removed and becomes spoil • 1 open pit mining – digging holes • 2 Dredging – scraping up underwater mineral deposits • 3 Area Strip Mining – on a flat area an earthmover strips overburden • 4 Contour Strip Mining – scraping ore from hilly areasGet price


Mechanics criterion and factors affecting overburden

Mechanics model of the main roof in solid dense filling stope As the mining workface advances solid backfills such as gangue would immediately be filled into goaf and fully connect with the roof strata of goaf with the support of the rear ramming structure Get price


Reading Open

For minerals that occur deep below the surface—where the overburden is thick or the mineral occurs as veins in hard rock—underground mining methods extract the valued material Open-pit mines that produce building materials and dimension stone are commonly referred to as "quarries "Get price


Mining Terms

Overburden is non-valuable minerals above ore which must be removed to extract the ore Pit Limit is the maximum vertical and lateral extent which may be excavated economically in an open pit mine Pit Slope is the angle from the horizontal which the wall of a open pit stands as measured from crest to toe Get price


Characterizations of macroscopic deformation and particle

SBCM is a green mining technology proposed for controlling mining induced surface subsidence and minimizing the impact on groundwater transport Moreover it can dispose of the gangue dump pile on the ground surface which will protect the environment and save some farming land [ ] In SBCM the solid backfilling material such as crushed gangue particle material (CGPM) loess aeolian sand and coal Get price


Surface Subsidence Control Mechanism and Effect Evaluation

Comprehensive mechanization solid backfilling mining is a new technology developed in China for coal mining and surface subsidence control Based on a gangue-backfilling project in the Yangzhuang Coal Mine the characteristics of underlying strata and surface deformation were studied by similar-material simulation method Get price


Topsoil and Overburden

TOPSOIL AND OVERBURDEN This document is a guideline only Its contents are not to be interpreted by applicants or DEQ staff as mandatory Its preparation is the result of numerous requests from applicants who expressed a need indicating by mining year for the term of the permit (coal only) (1) the acreage of each mapping unit to be affected Get price


Dartmoor tin

The issue that mine managers had to decide was whether it was worth removing the extra overburden to form a gulley in order to be able to mine deeper into the lode In a similar fashion to streamworking much use was made of water for the removal of the overburden and gangue Get price


Minerals Mining the Environment 9

Overburden vs Spoil vs Tailings vs Gangue? • Overburden – What's on top of mineral • Spoil – after the overburden gets removed • Gangue – the uneconomic portion of the ore that must be removed from the valuable portion • Tailings – what is left over after the process Get price


Effects of Water Soaked Height on the Deformation and

Solid backfill coal mining (SBCM) is a green mining technology that can meet the challenges of gangue dumps on the surface and the coal mining under buildings railways and water bodies This technology is aimed at using the solid waste material such as loose gangue and fly ash toGet price



The overburden depth at the test site is about 600 ft Fig 9 24 shows the detailed overburden geology at the test site which has been interpreted by correlating a test site gamma log and a nearby core hole Clearly the overburden geology is a typical Pittsburgh seam geology and is highlighted by many strong and weak rock interfaces which have been demonstrated to have major influences on Get price


Environmental Consequences of Open Pit Mining

Mar 14 2012Environmental Consequences of Open Pit Mining An open pit mine is a type of excavation where surface and subsurface materials (soil and rock) are removed typically through use of explosives and mechanical mining and hauling equipment to gain access to commercially valuable ores or other buried natural resources including coal and gemstones that are relatively close to the surface Get price


Spoils vs Tailings

As nouns the difference between spoils and tailings is that spoils is that which is taken from another by violence especially the plunder taken from an enemy pillage booty while tailings is the waste that remains after the minerals have been extracted from an ore Get price


How to use overburden in a sentence

The asymmetry of folds at shallower levels in the overburden sequence suggest that the original anticlinal ridges at the base of the overburden sequence were cuspate The contour mining method consists of removing overburden from the seam in a pattern following Get price

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