upward slicing longwall-roadway cemented

Uncertainty analysis of designed flood on Bayesian

Upward slicing longwall-roadway cemented backfilling technology for mining an extra-thick coal seam located under aquifers: a case study Original Article Application of HYDRUS-1D model for research on irrigation infiltration characteristics in arid oasis of northwest China

backfill materials investigated: Topics by Science gov

2018-9-15Investigation of Flash Fill{reg_sign} as a thermal backfill material SciTech Connect Ayers P H Charlton C B Frishette C W 1995-09-01 Flash Fill{reg_sign} was created as a fast-setting flowable backfill material made entirely from coal combustion by-products and water Its quick-setting self-leveling self-compacting characteristics makes trench road repairs faster easier and

A GLOSSARY OF THE MINING AND MINERAL INDUSTRY

2020-8-18characteristic of top slicing Each block Is undercut over tbe greater part of its bottom area and the supporting pillars blasted' out As the block caves and settles the cover follows Tbe method mlgbt be considered as Involving many of the features of top slicing combined wltb ore caving but applied on a larger scale (Young) Also

Upward slicing longwall

Many water inrush disasters have occurred in mines that were attempting to recover extra-thick coal seams located under aquifers This paper presents a technology known as upward slicing longwall-roadway cemented backfilling (USLCB) which can provide a safe and effective solution to

Engineering geology ground surface movement and

2004-12-1The uniaxial compressive tests in situ were conducted in a roadway crossing the ore vein along the exploratory line 12 on the mining level 1200 m in the No 2 Mine Buchnerite was chosen for the tests because of its representative of the ultrabasic rocks The rock mass samples tested were cubes that were 0 50 50 5 m in size

Engineering geology ground surface movement and

2004-12-1The uniaxial compressive tests in situ were conducted in a roadway crossing the ore vein along the exploratory line 12 on the mining level 1200 m in the No 2 Mine Buchnerite was chosen for the tests because of its representative of the ultrabasic rocks The rock mass samples tested were cubes that were 0 50 50 5 m in size

World Patent Index

CELLULOSE [email protected] CELLULOSIC Cellulosics CELLULOSUM CELP [1991] CELSIAN CELSIUS CEMENT Cementless Cements CEMENTATION Cementator CEMENTED Cementable Cementer Cementing Cementitious CEMENTITE CEMENTUM [1991] CEMETERY Cemeteries CENOSIS [1991] CENOSPHERE Cenospheres CENT CENTELLA CENTIGRADE CENTIPOISE

Appendix:Dictionary of Mining Mineral and Related

2020-7-1A linear area inby the last solid ground in a longwall-type mine where the roof or back caves behind the retreating excavation cave marble See: cave onyx cave onyx A compact banded deposit of calcite or aragonite found in caves capable of taking a high polish and resembling true onyx in appearance See also: dripstone onyx marble

Time

The filling barricade is one of the key components of roadway cemented backfill systems and this research focuses on critical factors influencing the performance of these systems particularly the lateral stress characteristics and the stability of the filling barricade In this paper a theoretical model is presented and applied to obtain and calculate the lateral pressures exerted on the

CN103306720A

The invention discloses an inclined separated layer solid filling coal mining method for a super thick coal seam which is suitable for the exploitation of an 'under three' super thick coal seam The method comprises the following steps: determining the number of inclined separated layers according to the principle that thickness of each separated layer is 2 5-4 5 m adopting a exploitation

mining method applied in barapukuria al mine

Barapukuria coal mine (BCM) is located at Dinajpur district NW Bangladesh Total area is Longwall retreating mining method is also applied for extraction of coal from single face with development of Barapukuria coal mine at a production Learn More Measurement of Natural Chat Now (PDF) Preferred Mining Method in Barapukuria Coal Mine

Engineering geology ground surface movement and

2004-12-1The uniaxial compressive tests in situ were conducted in a roadway crossing the ore vein along the exploratory line 12 on the mining level 1200 m in the No 2 Mine Buchnerite was chosen for the tests because of its representative of the ultrabasic rocks The rock mass samples tested were cubes that were 0 50 50 5 m in size

Geology for Civil Engineers

Caliche is a 'hard cap' deposit produced by upward capillary migration of ground waters during the arid period Depending upon the composition of the underlying rock and therefore the composition of these migrating solutions precipitates of carbonate (calcrete) siliceous (silcrete) or ferruginous (ferricrete) materials may be deposited

Proceedings of the 15th Multidisciplinary Conference

2019-2-16This is especially important where the recommendation will cost a lot of money Roger Brucker is a noted cave explorer and karst cave expert In a 2014 article in GeoStrata magazine (Brucker 2014) he cites a case where an expert warned of an underground karst cave and recommended routing a roadway around the area of thin roof rock

Proceedings of the 15th Multidisciplinary Conference

2019-2-16This is especially important where the recommendation will cost a lot of money Roger Brucker is a noted cave explorer and karst cave expert In a 2014 article in GeoStrata magazine (Brucker 2014) he cites a case where an expert warned of an underground karst cave and recommended routing a roadway around the area of thin roof rock

Study of the hydrogeological characteristics and

To increase the mineral production simultaneous upward mining in three sublevels has been designed i e the -200 -360 and -400 sublevels are mined at the same time The H Zhao () F Ma G Li Y Zhang J Guo mining sequence is from bottom to top by slicing and Key Laboratory of Engineering Geomechanics filling at a slice height of 2 m

An innovative approach for gob‐side entry retaining in

Upward slicing longwall‐roadway cemented backfilling technology for mining an extra‐thick coal seam located under aquifers: a case study Environ Earth Sci 2017 76(23):1‐15 31 Zhang X Lin J Liu J Li F Pang Z Investigation of hydraulic‐

how to mine very thick al seam in underground mining

Roof Movement and Failure Behavior When Mining Extra Thick A novel and environmental friendly backfill mining method known as upward slicing longwall roadway cemented backfill USLCB technology has recently been proposed and successfully applied in mines extracting extra thick coal seams located under sensitive areas This paper studies the effects USLCB had on roof movement and failure

Upward slicing longwall

2017-11-27Many water inrush disasters have occurred in mines that were attempting to recover extra-thick coal seams located under aquifers This paper presents a technology known as upward slicing longwall-roadway cemented backfilling (USLCB) which can provide a safe and effective solution to extract these seams The fundamentals of the technology are to divide a coal seam into several slices and

Minerals

For investigating perceptual stress characteristics of Functional Cemented Backfilling Materials (FCBM) in coal mines we prepared functional specimens based on Cemented Backfilling Materials (CBM) with the perceptual stress ability and clarified their conductive mechanism perceptual mechanism and possible engineering applications Using mechanical tests and the network parallel dynamic

An innovative approach for gob‐side entry retaining in

1 INTRODUCTION Gob‐side entry retaining technology is used to maintain the original roadway for the next working face mining by building pastes or high‐water backfills with 1‐3 m wide along the gob as roadside support 1-5 This technology has good economic and social benefits because it omits the protective coal pillar in the roadway fundamentally eliminates the stress concentration

Engineering geology for underground rocks

EP May pp81-83 Peng S (1995) Geological modeling techniques for longwall mining roof stability: a case study Proc Rock Mechanics and Strata Control in Mining and Geotech Eng Beijing Peng S Li Y (1996) Wedge-shaped sandstone roof strata and roof stability examples from Seam 13-1

Uncertainty analysis of designed flood on Bayesian

Upward slicing longwall-roadway cemented backfilling technology for mining an extra-thick coal seam located under aquifers: a case study Original Article Application of HYDRUS-1D model for research on irrigation infiltration characteristics in arid oasis of northwest China

Dictionary of Mining Mineral and Related Terms

2019-5-25site tools LANGUAGE SELECTION MAIN MENU HOME GENERAL INFO ANNOUNCEMENTS DIVISIONS STAFF LABORATORIES ACADEMICS CONTACT US SEARCH Latest News Maden İşletmelerinde İş Sağlığı ve Gvenliği Sempozyumu ğrencilerimizin web sitemize yeliği Af Sınavları Prof Dr zcan Glsoy'un Bahar Dnemi Aılış Mesajı Erasmus 2008-2009 2nd Semester

CN103306720A

The invention discloses an inclined separated layer solid filling coal mining method for a super thick coal seam which is suitable for the exploitation of an 'under three' super thick coal seam The method comprises the following steps: determining the number of inclined separated layers according to the principle that thickness of each separated layer is 2 5-4 5 m adopting a exploitation