Abstract
Once an excavation is formed, it must be ventilated and made secure before persons can venture through it. A wide range of ground support and reinforcement systems are available for securing the surfaces of underground excavations in coal mines. This chapter is focussed on identifying these systems and providing a mechanistic understanding of how they function. This provides an engineering basis for selecting suitable support and reinforcement systems, installing them in an effective manner, and appropriately monitoring the resulting ground response.
The chapter commences by identifying the primary characteristics of any ground support system, being initial stiffness, load capacity, yield capacity and, where appropriate, stability. The distinction is made between the function of a support element and that of a reinforcing element. It then goes on to evaluate support and reinforcement systems under the headings of standing support; tendon support and reinforcing elements; surface restraint systems; spiling; strata binders; and void fillers.
A considerable portion of the chapter is devoted to the anchorage methods for tendon support systems as these play a critical role in tendon performance. The principles of classical beam theory presented in Chap. 2 are then invoked and developed further to provide direction as the type, location, density and timing of installation of ground support systems. The chapter is supported with an extensive selection of photographic illustrations of these systems installed in coal mines along with other figures to help the reader visualise and better understand the underpinning engineering principles.
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References
ACARP. (2014). Development of a new testing procedure for the assessment of resin performance for improved encapsulated bolt installation in coal mines. ACARP Matters. ACARP research project C21011. Brisbane: Australian Coal Association Research Program. (ACARP).
Aziz, N. (2004). An update of roof bolt research at the University of Wollongong (pp. 215–224). Paper presented at the Coal 2004: Coal operators’ conference, Wollongong. AusIMM.
Azuar, J. J. (1977). Stabilization des Massifs Rocheux Fissures par Barres D’acier Scellees (Rapport de Recherche LPC issue no. 73, p. 70). France: Laboratoire Central des Ponts Chaussees.
Baafi, E., Porter, I., Nemcik, J., Mews, K., Noé, N., & Tibbs, M. (2014). Polymer-based alternative to steel mesh for coal mine strata reinforcement. ACARP Project C20041 – Stage one (p. 204). Brisbane: Australian Coal Association Research Program.
Barczak, T. M. (2005). An overview of standing roof support practices and developments in the United States. Paper presented at the 3rd Southern African rock engineering symposium, Johannesburg. SAIMM.
Barczak, T. M., & Gearhart, D. F. (1993). Engineering methods for the design and employment of wood cribs. Information circular IC 9361 (p. 34). Pittsburgh: U.S. Bureau of Mines.
Barczak, T. M., & Gearhart, D. F. (1994). Optimising wood crib design, improving ground control and reducing wood costs. Engineering and Mining Journal, 195(12), 23–30.
Bieniawski, Z. T. (1987). Strata control in mineral engineering. Rotterdam: A.A. Balkema.
Brady, B. H. G., & Brown, E. T. (2006). Rock mechanics for underground mining (3rd ed.). Dordrecht: Springer.
Butcher, R. K. (1994). Experience with flexibolts at Angus Place Colliery. Paper presented at the ACARP underground roadway development workshop, Paper 3. Australian Coal Association Research Program (ACARP).
Campbell, R., & Mould, R. (2003). Investigation into the extent and mechanisms of gloving and un-mixed resin in fully encapsulated roof bolts (pp. 256–262). Paper presented at the 22nd international conference on ground control in mining, Morgantown. West Virginia University.
Campbell, R., Mould, R., & MacGregor, S. (2004). Investigation into the extent and mechanism of gloving and unmixed resin in fully encapsulated roof bolts (pp. 203–214). Paper presented at the Coal 2004: Coal operators’ conference, Wollongong. AusIMM.
Campoli, A. A., Mills, P. S., Todd, P., & Dever, K. (1999). Resin annulus size effects on rebar bolt pull strength and resin loss to fractured rock (pp. 222–231). Paper presented at the 18th international conference on ground control in mining, Morgantown. West Virginia University.
Canbulat, I. (2008). Evaluation and design of optimum support systems in South African collieries using the probabilistic design approach. PhD thesis, University of Pretoria, Pretoria.
Coates, D. F., & Yu, Y. S. (1970). Three dimensional stress distributions around a cylindrical hole and anchor (pp. 175–181). Paper presented at the 2nd congress International Society Rock Mechanics, Belgrade.
Compton, C. S., & Oyler, D. C. (2005). Investigation of fully-grouted bolts installed under in-situ conditions (pp. 302–312). Paper presented at the 24th international conference ground control in mining, Morgantown. West Virginia University.
Cook, N. G. W., Klokow, J. W., & White, A. J. A. (1974). Practical rock mechanics for gold mining (P.R.D. series no. 167). Johannesburg: Chamber of Mines of South Africa.
Corbett, P. (2011). Installation of long tendons in roadway development. Paper presented at the ACARP roadway development operators workshop Brisbane, 153. Australian Coal Association Research Program (ACARP).
Craig, P., & Aziz, N. (2010). Shear testing of 28 mm hollow strand “TG” cable bolt (pp. 169–174). Paper presented at the 29th international conference ground control in mining, Morgantown. West Virginia University.
Craig, P., Saydam, S., Hagan, P., Crosky, A., & Hebblewhite, B. K. (2010). Australian rock bolt steel chemistry and stress corrosion cracking (pp. 79–84). Paper presented at the 2nd Australasian ground control in mining conference, Sydney. AusIMM.
Crosky, A., Fabjanczyk, M., Gray, P. A., Hebblewhite, B. K., & Smith, B. (2002). Premature rock bolt failure. ACARP end of grant report no. C8008 (Stage 1). (p. 139). Brisbane: Australian Coal Association Research Program (ACARP).
Crosky, A., Fabjanczyk, M., Gray, P. A., & Hebblewhite, B. K. (2004). Premature rock bolt failure: Stage 2. ACARP end of grant report C8008 (Stage 2). Brisbane: Australian Coal Association Research Program (ACARP).
Crosky, A., Smith, B., Elias, E., Chen, H., Craig, P., Hagan, P., Vandermaat, D., Saydam, S., & Hebblewhite, B. (2012). Stress corrosion cracking failure of rockbolts in underground mines in Australia. Paper presented at the 7th international symposium on rockbolting and rock mechanics in mining, Aachen, 14. RWTH Aachen University.
Daemen, J. J. K. (1977). Problems in tunnel support mechanics. Underground Space, 1(3), 163–172.
Dalzell, R. S., & Curth, E. A. (1985). Remedial and strata replacement techniques on longwall faces. Information circular IC 9014 (p. 34). Pittsburgh: U.S. Bureau of Mines.
Dolinar, D. R. (2010). Ground and standing support interaction in tailgates of Western U.S. longwall mines used in the development of a design methodology based on the ground reaction curve (pp. 152–160). Paper presented at the 29th international conference on ground control in mining, Morgantown. West Virginia University.
Dunham, R. K. (1976). Anchorage tests on strained-gauged resin bonded bolts. Tunnels and Tunnelling, 8(6), 73–76.
Elias, E., Vandermaat, D., Craig, P., Chen, H., Crosky, A., Saydam, S., Hagan, P., & Hebblewhite, B. (2013). Metallurgical examination of rockbolts failed in service due to stress corrosion cracking (pp. 473–484). Paper presented at the 7th international symposium on ground support in mining and underground construction, Perth. Australian Centre for Geomechanics.
Fabjanczyk, M. W., & Tarrant, G. C. (1992). Load transfer mechanisms in reinforcing tendons (pp. 212–219). Paper presented at the 11th international conference on ground control in mining, Wollongong. AusIMM.
Fairhurst, C., & Singh, B. (1974). Roof bolting in horizontally laminated rock. Engineering and Minallurgy Journal (February), 80–90.
Farmer, I. W. (1975). Stress distribution along a resin grouted rock anchor. International Journal of Rock Mechanics and Mining Science, 12(11), 347–351.
Franklin, J. A., & Woodfield, P. F. (1971). Comparison of a polyester resin and a mechanical rockbolt anchor. Transactions of the Institution of Mining and Metallurgy, 80, A91–A100.
Fuller, P. G., & O’Grady, P. (1993). Flexibolt flexible roof bolts: A new concept for strata control (pp. 24–34). Paper presented at the 12th international conference on ground control in mining, Morgantown. West Virginia University.
Fuller, P., & O’Grady, P. (1994). Performance evaluation of flexibolt flexible roof bolts. ACARP end of grant report C3025. (p. 109). Brisbane: Australian Coal Association Research Program (ACARP).
Fuller, P. G., O’Grady, P., McCowan, B., & Butcher, R. K. (1994). Operational experiences with FLEXIBOLT systems in Australian coal mines (pp. 18–31). Paper presented at the 13th international conference on ground control in mining, Morgantown. West Virginia University.
Gale, W. J., & Matthews, S. M. (1993). Stress control method for optimised development and extraction operations. NERDDP report no. P282N, ACARP end of grant report C1301 (p. 200). Brisbane: Australian Coal Association Research Program (ACARP).
Gale, W. J., O’Beirne, T., Ostle, S., Shaw, R., Shepherd, J., Stone, I., & Yearby, M. (1993). Chapter 19: Roadway support. In A. J. Hargraves & C. H. Martin (Eds.), Australasian coal mining practice. Melbourne: AusIMM.
Galvin, J. M. (1996). Impact of geology on longwall mining: A 20 year case study (p. 21). Paper presented at the symposium on geology in longwall mining. Coalfield Geology Council of New South Wales.
Galvin, J. M., & Wagner, H. (1994). Rock bolt load diagrams (Lecture Notes). Sydney: University of New South Wales.
Galvin, J. M., Steijn, J. J., & Wagner, H. (1982). Chapter 4: Rock mechanics of total extraction. In C. J. Fauconnier & R. W. O. Kirsten (Eds.), Increased underground extraction of coal (Monograph series 4, pp. 69–110). Johannesburg: SAIMM.
Galvin, J. M., Lin, B. B., Silveira, A. C., & Rochford, T. (1996). Performance and cost effectiveness of timber chock constructions. ACARP end of grant report C3068 (p. 57). Brisbane: Australian Coal Association Research Program (ACARP).
Galvin, J. M., Offner, J. C., & Fabjancyk, M. (2001a). UNSW rockbolt testing facility and performance research. Paper presented at the 3rd international underground coal conference, Sydney. UNSW/ACIRL.
Galvin, J. M., Offner, J. C., Whitaker, A., Fabjanczyk, M. W., & Watson, J. O. (2001b). Establishing anchorage and failure mechanisms of fully encapsulated roof support systems. ACARP end of grant report C7018 (p. 194). Brisbane: Australian Coal Association Research Program (ACARP).
Gardner, F. J. (1971). History of rock bolting. Paper presented at the symposium on rock bolting, Wollongong, 2–0 to 2–14. Illawarrra Branch AusIMM.
Gearhart, D. F., & Batchler, T. J. (2012). Aspect ratio and other parameters that affect the performance of Burrell can roof supports (pp. 80–88). Paper presented at the 31st international conference on ground control in mining, Morgantown. West Virginia University.
Gelson, J., & Mahoney, W. (2001). The design, testing and application of ground support membranes for use in underground mines. Paper presented at the 3rd international underground coal conference, Sydney. University of New South Wales/ACIRL.
Gray, P. A., Hunt, N., & Fabjanczyk, M. W. (1998). New developments in ground support with particular reference to high capacity, High load transfer rock bolts (pp. 513–524). Paper presented at the international conference on geomechanics/ground control in mining and underground construction, Wollongong. University of Wollongong.
Hagan, P. C. (2003). Observations on the differences in load transfer of a fully encapsulated rockbolt (pp. 161–166). Paper presented at the 1st Australasian ground control in mining conference, Sydney. UNSW/AGCM.
Hartman, W., & Hebblewhite, B. K. (2003). Understanding the performance of rock reinforcement elements under shear loading through laboratory testing – A 30 year history. Paper presented at the 1st Australasian ground control in mining conference, Sydney. UNSW/AGCM.
Hartman, W., Harvey, F., Lecing, B., Higgs, J., & Tongue, D. (2010). Managing geotechnical risk through non-destructive rock reinforcement testing trialled at the George Fisher Mine, Mt Isa (pp. 127–141). Paper presented at the 2nd Australasian ground control in mining conference, Sydney. AusIMM.
Hawkes, J. M., & Evans, R. H. (1951). Bond stress in reinforced concrete columns and beams. Structural Engineering, 29, 323–328.
Hoek, E., & Brown, E. T. (1980). Underground excavations in rock. London: Institution of Mining and Metallurgy.
Hutchinson, D. J., & Diederichs, M. S. (1996). Cablebolting in underground mines. Richmond: BiTech Publishers.
Kaiser, P. K., Yazici, S., & Nose, J. (1992). Effect of stress change on the bond strength of fully grouted cables. International Journal of Rock Mechanics and Mining Science, 29(3), 293–306.
Laurence, D. C., Galvin, J. M., & Beer, L. (2000). Polymer membrane liners in underground coal mines – Ground control for the millennium? (pp. 378–386) Paper presented at the 19th international conference ground control in mining, Morgantown. West Virginia University.
Martin, C. H., Hargraves, A. J., Kininmonth, R. J., & Saywell, S. M. C. (1993). History of coal mining in Australia (A. J. Hargraves Ed., 1st ed.). Melbourne: AusIMM.
Martin, L., Milne, D., Ruest, M., & Pakalnis, R. (2004). Evaluation of instrumented cable bolts in cement grout to determine physical and numerical modelling properties. Report of investigation RI9662. Pittsburgh: NIOSH.
McCowan, B. (1994). New roof and rib support technology a major breakthrough for Ellalong Colliery. Paper presented at the ACARP underground roadway development workshop, Brisbane. Australian Coal Association Research Program (ACARP).
McKensey, S. B. (1952). Roof bolting in bord and pillar workings. Elrington and Hebburn No. 2 Collieries. Supplement to AusIMM Bulletin, Feb 1952, 40.
McTyer, K. D. (2015). Optimisation of roof bolt length based on improved resin performance. ACARP end of grant report C21023. Brisbane: Australian Coal Association Research Program (ACARP).
Menzies, R. A. (c1970). Roof support in coal mines. Sydney: NSW State Government.
Molinda, G. (2008). Reinforcing coal mine roof with polyurethane injection: 4 case studies. Geotech Geol Eng, 26, 533–566.
Moosavi, M., Bawden, W. F., & Hyett, A. J. (2002). Mechanism of bond failure and load distribution along fully grouted cable-bolts. Transactions of the Institution of Mining and Metallurgy, 111(1), 1–12.
Mosse-Robinson, S., & Sharrock, G. (2010). Laboratory experiments to quantify the pull-out strength of single strand cable bolts for large boreholes (pp. 201–209). Paper presented at the 2nd Australasian ground control in mining conference, Sydney. AusIMM.
Naismith, W. A. (1989). Cable anchor applications in South African collieries (pp. 71–76). Paper presented at the symposium on advances in rock mechanics in underground coal mining, Witbank. Southern African National Group on Rock Mechanics.
Offner, J. C. (2000). The anchorage and failure mechanisms of fully encapsulated rock bolts. M.E thesis, University of New South Wales, Sydney.
Offner, J. C., Galvin, J. M., McCartney, C., & Beer, L. (1999). Improving safety and performance of timber chock constructions. ACARP end of grant report C6034, pp. 113. Australian Coal Association Research Program (ACARP).
Pells, P. J. N. (2008). What happened to the mechanics in rock mechanics and the geology in engineering geology? (pp. 1–36). Paper presented at the 6th international symposium on ground control in mining and civil engineering construction, Capetown. Southern African Institute of Mining and Metallurgy
Robertson, S. B., Molinda, G. M., Dolinar, D. R., & Pappas, D. M. (2003). Best practices and bolting machine innovations for roof screening. Paper presented at the 2003 SME annual meeting, Cincinnati, OH, 8. SME.
Ruppel, U., & Wittenberg, D. (2001). In situ non-destructive testing of fully grouted rockbolts. Paper presented at the 3rd international underground coal conference, Sydney.
Schaller, S., & Russell, P. (1986). Trial application of polyurethane resin in Australian coal mines (pp. 134–142). Paper presented at the conference or ground movement and control related to coal mining, Wollongong. AusIMM.
Schubert, P. (1984). Das Tragvermögen des mörtel – versetzten Ankers unter aufgezwungener Kluftverschiebung [The support behaviour of grouted rock bolts subjected to shear movement along a joint plane]. PhD thesis, Montan University, Leoben, Austria.
Seedsman, R. W. (2012). The development and application of a logical framework for specifying roof and rib support/reinforcement in Australian underground coal mines (pp. 153–161). Paper presented at the 7th international symposium on rock bolting & rock mechanics, Aachen.
Signer, S. P. (1990). Field verification of load transfer mechanics of fully grouted roof bolts. Research investigation RI 9301 (p. 18). Pittsburgh: U.S. Bureau of Mines.
Spann, H. P., & Napier, J. A. (1983). The influence of different patterns and anchor types on the deflection of a laminated beam. Research report no. 25/83, p. 56. Johannesburg: Chamber of Mines of South Africa Research Organisation.
Spearing, A. J. S., Greer, B., & Reilly, M. (2011). Improving rock bolt installations in US coal mines. South African Institute of Mining and Metallurgy, 111(August), 555–563.
Stimpson, B. (1987). Optimising the reinforcement effect of full-column, untensioned, grouted bolts in bedded mine roofs. International Journal of Mining and Geological Engineering, 5(3), 285–298.
Tadolini, S. C. (1998). Effect of reduced annulus in roof bolting performance (pp. 231–236). Paper presented at the 17th international conference on ground control in mining, Morgantown, WV. West Virginia University.
Ulrich, B., Wuest, J., & Stateham, R. (1989). Relationships between annulus thickness and the integrity of resin grouted bolts. Research investigation RI 9253. Pittsburgh: U.S. Bureau of Mines.
Wade, L. V., Kwitowski, A. J., & Judeikis, J. F. (1977). Investigation of full-column resin bolt reinforcement mechanisms. Paper presented at the 6th international strata control conference, Banff, Paper 25.
Wagner, H. (1985a). Design of roofbolting patterns – Workshop course notes. Johannesburg: Chamber of Mines of South Africa Research Organisation.
Wagner, H. (1985b). Theory of roofbolt support – Workshop course notes. Johannesburg: Chamber of Mines of South Africa Research Organisation.
Wagner, H. (1994). Coal strata control handbook. Unpublished.
Wagner, H. (1995). Roof bolt mechanics. Pillar and roadway mechanics – Stage 2 – Principles and practice (p. 21). Sydney: School of Mines, University of New South Wales.
Whitaker, A. (1998). Critical assessment of past research into rock bolt anchorage mechanisms. BE research, University of New South Wales, Sydney.
Wilkinson, A., & Canbulat, I. (2005). An investigation into the support systems in South African collieries (pp. 294–301). Paper presented at the 24th international conference on ground control in mining, Morgantown. West Virginia University.
Windsor, C. R., & Thompson, A. G. (1993). Rock reinforcement – Technology. Testing, design and evaluation. In J. A. Hudson (Ed.), Comprehensive rock engineering; Principles, practice and projects (Vol. 3, pp. 451–484). Oxford: Pergamon Press.
Windsor, C. R., & Thompson, A. G. (1997). Rock reinforcement practice – Advanced course. Leederville: Rock Technology Pty Limited.
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Galvin, J.M. (2016). Support and Reinforcement Systems. In: Ground Engineering - Principles and Practices for Underground Coal Mining . Springer, Cham. https://doi.org/10.1007/978-3-319-25005-2_6
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