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Keywords: roadway
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1607
... ABSTRACT: Jinchuan mine is the largest underground nickel mine in China, There is highly stressed surrounding rock in this mine. The problem of highly fractured roadway support in the mine is serious. In the paper, according to mechanical principle of imitation soil nail reinforcement on...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0524
... explained. The work process of the ultrasonic detection is introduced with a detection case of a coal mine goaf under a railway bridge in Shanxi, China. The ultrasonic reflection signatures of wall, fork and ground obstacle of the mine roadway have been discussed. The post-processing techniques of the...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0634
... ABSTRACT: In underground coal mining practice, a majority of rocks are composed of clay minerals. When roadways are placed in them, clay minerals are exposed to water and humidity and will absorb water rapidly and generate pressures that can break apart the weakly bonded rock, leading to a...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-062
... ventilation goaf side pressure relief gas rich region, migration channel, gas distribution and pressure relief on gas migration law, put forward new technologies and new ways to stay roadway drilling method of coal and gas extraction” Yuan Liang studied [4] . “The low permeability coal seam group with high...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-105
... surrounding rock and bolt support system are opened. And it is also very important to improve support material, optimize support parameters, and enhance excavating management. 1. INTRODUCTION Coal seam obliquity increasing results in asymmetrical structure of extracting roadway and adds it is difficult...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-242
... metals & mining strength stress anisotropy reservoir geomechanics slip plane Upstream Oil & Gas level gallery Reservoir Characterization orientation horizontal stress roadway pillar stability situ stress pvk-5 incline gallery roof condition King seam investigation...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-324
... bed methane coalfield Fracture Zone Upstream Oil & Gas extraction metals & mining complex reservoir borehole gas permeability gas extraction extraction technology gas flow Drilling permeability accident Coal Mining coal seam gas de-stressed zone roadway China mining area...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-168
... engineering construction, grouting is a common means of the disaster management projects. Grouting can improve the mechanical parameters of surrounding rock and the stress state of surrounding rock. Grouting is benefit for the surrounding rock stability and roadway safety in long term. But the slurry can not...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-302
... factor making energy accumulate in the surrounding rock resulting in rock bursting; moreover, the weak structure decreases the value of the maximal energy density (Ud)max and increases the distance between its position and the surrounding roadway, namely the value of energy density factor, k. The...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-182
... facility for testing of various rockbolts. The laboratory facility will enable the development and testing of new coal mine rockbolts to withstand SCC. 2. ROADWAY STRESSES IN AUSTRALIAN LONGWALL MINES The extraction of coal using the longwall coal mining system involves large areas of coal some 250m...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-237
... fracture number and size occurring around underground roadways. The new method of rock mass quality estimation is correlated with RQD index, but the investigations are done directly in the bore-holes. This is an "in situ" method, which takes into account all natural factors influencing the mine working...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-1035
... ABSTRACT: Grouting reinforcement is an effective supporting method to keep the roadway stable when the surrounding rock is loose, soft and broken. The paper introduces an ideal material for grouting reinforcement, ZKD Quick-setting and High-water-content material, whose consolidation mechanism...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-1041
... ABSTRACT: How to put grouting technology in much wider use is always the concern of experts and engineers. One of the new subjects is its use in strata control of roadway. Based on the study of special change features of strength, deformation and consolidation properties of surrounding rock...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0355
... Upstream Oil & Gas coal stress zone lateral abutment mechanism narrow pillar bearing load goaf strength residual strength high-strength bolt fully-mechanized top coal pillar metals & mining roadway stress distribution formula top coal stability enhancement theory...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0351
... ABSTRACT: This paper examines the mechanical principle of the roadway driving along next goaf in coal face with fully mechanized top-coal caving. On the basis of analyzing mechanical situation of the roadway, a mechanical model of roadway floor is established. Applying the elastic theory, the...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0147
... INTRODUCTION ABSTRACT: Recent analysis of roadway deformation monitoring information from across the Selby coalfield has confirmed the detrimental effects of high horizontal stress direction on roadway stability for United Kingdom coal mine roadways. The results of a three dimensional non...
Proceedings Papers

Paper presented at the The 35th U.S. Symposium on Rock Mechanics (USRMS), June 5–7, 1995
Paper Number: ARMA-95-0411
... ABSTRACT: Convergence velocity, as an indicator for stability of coal mine roadways has been used in this study. The concept has been extended to a spectrum of conditions in several coal mines resorting to bord and pillar system. Several junctions in each mine were instrumented to establish...
Proceedings Papers

Paper presented at the The 35th U.S. Symposium on Rock Mechanics (USRMS), June 5–7, 1995
Paper Number: ARMA-95-0889
.... The intense floor heave has made roadway support costs obviously rise, what is more, seriously hindered coal mining rate. The floor heave is a very complicated process. It not only relates to the physical and mechanical properties of surrounding strata, but also depends on the stress distribution...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-843
... ABSTRACT The destruction arising from the loss of stability in the underground roadways and rooms are due to the appearance of the plastic zone of the surrounding rock in the roadway, or to the development of the stress limit equilibrium zone. The theoretical analysis in the past was based...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0837
... ABSTRACT ABSTRACT, The necessity of using tensible rockbolt in the roadway with soft rock, high in-situ stresses, mining influence and other complex conditions was discussed, the structures of three kinds of tensible rockbolt and design principle were introduced in this paper. The tests of...

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