Compression Characteristics of Solid Wastes as Backfill Materials

A self-made large-diameter compression steel chamber and a SANS material testing machine were chosen to perform a series of compression tests in order to fully understand the compression characteristics of differently graded filling gangue samples. The relationship between the stress-deformation modulus and stress-compression degree was analyzed comparatively. The results showed that, during compression, the deformation modulus of gangue grew linearly with stress, the overall relationship between stress and compression degree was approximately nonlinear, and the deformation of gangue was rather large during the initial portion of the test. Gangue sample mixed with Talbot Formula provides the best deformation resistance capacity, followed by fully graded and single-graded gangue samples. For applications, with adjustment of the gradation of filling materials and optimal design of compacting equipment, surface subsidence may be better controlled.

[1]  Christopher Mark,et al.  Behavior of simulated longwall gob material , 1993 .

[2]  Krystyna M. Skarżyńska,et al.  Reuse of coal mining wastes in civil engineering — Part 1: Properties of minestone , 1995 .

[3]  E. Topuz,et al.  Characterization of coal-mine refuse as backfilling material , 1996 .

[4]  H. Yavuz,et al.  An estimation method for cover pressure re-establishment distance and pressure distribution in the goaf of longwall coal mines , 2004 .

[5]  Xu Jia-lin,et al.  Green mining of coal resources harmonizing with environment , 2007 .

[6]  Xin-min Wang,et al.  The experimental study of the coal gangue as gel filling materials , 2008 .

[7]  Qian Ming-gao,et al.  Research on Green Mining of Coal Resources in China:Current Status and Future Prospects , 2009 .

[8]  Qiang Zhang,et al.  BACKFILLING TECHNOLOGY OF SUBSTITUTING WASTE AND FLY ASH FOR COAL UNDERGROUND IN CHINA COAL MINING AREA , 2011 .

[9]  Ju Feng.  Experimental Research on the Compress Deformation Characteristic of Waste-Flyash and Its Application in Backfilling Fully Mechanized Coal Mining Technology , 2011 .

[10]  Qiang Zhang,et al.  Backfilling technology and strata behaviors in fully mechanized coal mining working face , 2012 .

[11]  Li Shuxing.  Experimental analysis of compaction characteristics filled by coal gangue , 2012 .

[12]  Martin Junker,et al.  Progress in the research and application of coal mining with stowing , 2013 .

[13]  J. X. Zhang,et al.  Application of solid backfill mining techniques for coal mine under embankment dam , 2013 .

[14]  Xuejie Deng,et al.  Prediction of the Height of the Water-Conducting Zone Above the Mined Panel in Solid Backfill Mining , 2014, Mine Water and the Environment.

[15]  J. X. Zhang,et al.  Experimental investigation on compaction properties of solid backfill materials , 2014 .

[16]  Qiang Wang,et al.  Subsidence prediction method based on equivalent mining height theory for solid backfilling mining , 2014 .

[17]  Gangwei Fan,et al.  Reduction and utilization of coal mine waste rock in China: A case study in Tiefa coalfield , 2014 .