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Longwall support requirements
143A 844187 Characterization of subsidence over iongwall mining panels eastern coal province Conroy, P J; Gyarmaty, J H US Bureau of Mines report OFR 192-83, May 1983, 120P
The objective of this study was to describe the physical response of overlying strata to longwall mining of panels and observe changes in surface and ground water flows caused by subsidence from underground mining. The study was performed at Quarto Mining Co's No 4 mine in the eastern coal province. The work included monitoring both surface and underground instrumentation and characterizes surface subsidence and strain, determines the potential effects of subsidence on cultural features including structures and water supplies, and develops criteria to assist in predicting subsidence for mines with similar mining and geologic conditions.
Temporary and permanent supports See also: 844099, 844120, 844130 844188
Design of supports in mines Biron, C; Arioglu, E New York: Wiley, 1983, 248P Textbook on the design of supports in mines: wooden supports, steel gallery supports, roof bolts, trusses, longwall supports, concrete supports and stowing. 844189
Monolithic packing at Newstend Colliery Forrest, W Colliery Guard V232, N2, Feb 1984, P66-67 844190 Improved strata control with mechanised face end supports at
Hickleton Colliery Colliery Guard V232, N2, Feb 1984, P72-75
844191 Creep in concrete shaft linings and its effect on strain measurement. Technical note Sbelton, P D lnt J Min Engng V2, NI, March 1984, P85-90
wire mesh supplemented by shotcreting should be used. 844194 Dimensioning of yieldable steel arches (T.H. arches) Arioglu, E; Yuksel, A J Min Met Fuels V31, N6-7, June-July 1983, P280-282
Charts are presented which enable the spacing of T.H. supports and the unit profile weight to be determined. They apply to roadways in weak strata like those encountered in Turkish coal mines. 844195 Longwall support requirements Unrug, K K J Min Met Fuels V31, N9, Sept 1983, P334-344
The interaction between mechanical supports and roof strata on a longwall face is described and a classification system reflecting the quality of the roof strata is suggested. This system, a useful aid in the planning of longwali faces, is used in Poland and examples of its application are given. 844196 Longwall face supports - the British experience Stokes, H; Stace, L R J Miu Met Fuels V31, N9, Sept 1983, P407-413,415
The development of powered supports in the UK is reviewed and the parameters governing the design and application of support systems in British conditions are indicated. Powered supports have allowed significant improvements to be made in production, productivity and safety. 844197 Ground control in British longwall mining Isaac, A K J Min Met Fuels V31, N9, Sept 1983, P423-436,443
Ground control developments within the British longwall system are reviewed, in particular the design of gateroad support at fast retreating longwall faces and powered support performance at longwall faces. 844198 New era of powered supports in the UK for Iongwall faces Wright, G J Min Met Fuels V31, N9, Sept 1983, P441-443
844192 Study on the relationship between supports and surrounding rocks in longwall face using finite element method (In Chinese) Shi Yuanwei J China Coal Sac N2, 1983, Pl-17
All heavy-duty faces in the UK are being installed with chockshield supports. New minimum requirements have been specified for setting and load densities which have led to the design of a new range of face supports.
The finite element method is used to analyse the effect of support parameters and mining depth on roof behaviour in a longwall face. It is indicated that the elastic modulus of the caved material in the goaf and the rigidity and setting load of the support are the major factors affecting roof behaviour. It is suggested that supports with high rigidity, adequate setting force and low rate of opening of relief valves could improve the roof conditions in a longwall face.
844199 Characteristics of steel arch support systems for mine roadways. Part 2. Effect of strutting
844193 Rock-bolting and shotcreting in areas influenced by coal extraction (In Chinese) Duan Zbenxi; An Guoliang J China Coal Sac N2, 1983, P73-80
The mechanism of combined rock-bolting and shotcreting is discussed. This system forms an integral and inflexible structure with the surrounding strata and adapts to the influence of coal extraction. Where abutment pressure is high, rock-bolting and
Jukes, S G; Hassani, F P; Whittaker, B N Mira Sci Teclmol VI, N2, Jan 1984, P107-121 Strut theory is briefly reviewed and the significance of the slenderness ratio upon the stability of the strut is discussed. Tests on groups of arches are described, these having been designed to investigate the effect of: (1) spacing of arches (ie length of strut), (2) strength of strut and (3) number of struts. 8442O0 Mesh layers make lightweight lining Fullalove, S New Cie Emgr N580, 8 March 1984, P26
The objective of this study was to describe the physical response of overlying strata to longwall mining of panels and observe changes in surface and ground water flows caused by subsidence from underground mining. The study was performed at Quarto Mining Co's No 4 mine in the eastern coal province. The work included monitoring both surface and underground instrumentation and characterizes surface subsidence and strain, determines the potential effects of subsidence on cultural features including structures and water supplies, and develops criteria to assist in predicting subsidence for mines with similar mining and geologic conditions.
Temporary and permanent supports See also: 844099, 844120, 844130 844188
Design of supports in mines Biron, C; Arioglu, E New York: Wiley, 1983, 248P Textbook on the design of supports in mines: wooden supports, steel gallery supports, roof bolts, trusses, longwall supports, concrete supports and stowing. 844189
Monolithic packing at Newstend Colliery Forrest, W Colliery Guard V232, N2, Feb 1984, P66-67 844190 Improved strata control with mechanised face end supports at
Hickleton Colliery Colliery Guard V232, N2, Feb 1984, P72-75
844191 Creep in concrete shaft linings and its effect on strain measurement. Technical note Sbelton, P D lnt J Min Engng V2, NI, March 1984, P85-90
wire mesh supplemented by shotcreting should be used. 844194 Dimensioning of yieldable steel arches (T.H. arches) Arioglu, E; Yuksel, A J Min Met Fuels V31, N6-7, June-July 1983, P280-282
Charts are presented which enable the spacing of T.H. supports and the unit profile weight to be determined. They apply to roadways in weak strata like those encountered in Turkish coal mines. 844195 Longwall support requirements Unrug, K K J Min Met Fuels V31, N9, Sept 1983, P334-344
The interaction between mechanical supports and roof strata on a longwall face is described and a classification system reflecting the quality of the roof strata is suggested. This system, a useful aid in the planning of longwali faces, is used in Poland and examples of its application are given. 844196 Longwall face supports - the British experience Stokes, H; Stace, L R J Miu Met Fuels V31, N9, Sept 1983, P407-413,415
The development of powered supports in the UK is reviewed and the parameters governing the design and application of support systems in British conditions are indicated. Powered supports have allowed significant improvements to be made in production, productivity and safety. 844197 Ground control in British longwall mining Isaac, A K J Min Met Fuels V31, N9, Sept 1983, P423-436,443
Ground control developments within the British longwall system are reviewed, in particular the design of gateroad support at fast retreating longwall faces and powered support performance at longwall faces. 844198 New era of powered supports in the UK for Iongwall faces Wright, G J Min Met Fuels V31, N9, Sept 1983, P441-443
844192 Study on the relationship between supports and surrounding rocks in longwall face using finite element method (In Chinese) Shi Yuanwei J China Coal Sac N2, 1983, Pl-17
All heavy-duty faces in the UK are being installed with chockshield supports. New minimum requirements have been specified for setting and load densities which have led to the design of a new range of face supports.
The finite element method is used to analyse the effect of support parameters and mining depth on roof behaviour in a longwall face. It is indicated that the elastic modulus of the caved material in the goaf and the rigidity and setting load of the support are the major factors affecting roof behaviour. It is suggested that supports with high rigidity, adequate setting force and low rate of opening of relief valves could improve the roof conditions in a longwall face.
844199 Characteristics of steel arch support systems for mine roadways. Part 2. Effect of strutting
844193 Rock-bolting and shotcreting in areas influenced by coal extraction (In Chinese) Duan Zbenxi; An Guoliang J China Coal Sac N2, 1983, P73-80
The mechanism of combined rock-bolting and shotcreting is discussed. This system forms an integral and inflexible structure with the surrounding strata and adapts to the influence of coal extraction. Where abutment pressure is high, rock-bolting and
Jukes, S G; Hassani, F P; Whittaker, B N Mira Sci Teclmol VI, N2, Jan 1984, P107-121 Strut theory is briefly reviewed and the significance of the slenderness ratio upon the stability of the strut is discussed. Tests on groups of arches are described, these having been designed to investigate the effect of: (1) spacing of arches (ie length of strut), (2) strength of strut and (3) number of struts. 8442O0 Mesh layers make lightweight lining Fullalove, S New Cie Emgr N580, 8 March 1984, P26