Application of solid backfill mining techniques for coal mine under embankment dam

Abstract. Coal mines in the western areas of China experience low mining rates and induce many geohazards when using the room and pillar mining method. In this research, we proposed a roadway backfill method during longwall mining to target these problems. We tested the mechanical properties of the backfill materials to determine a reasonable ratio of backfill materials for the driving roadway during longwall mining. We also introduced the roadway layout and the backfill mining technique required for this method. Based on the effects of the abutment stress from a single roadway driving task, we designed the distance between roadways and a driving and filling sequence for multiple-roadway driving. By doing so, we found the movement characteristics of the strata with quadratic stabilization for backfill mining during roadway driving. Based on this research, the driving and filling sequence of the 3101 working face in Changxing coal mine was optimized to avoid the superimposed influence of mining-induced stress. According to the analysis of the surface monitoring data, the accumulated maximum subsidence is 15 mm and the maximum horizontal deformation is 0.8 mm m−1, which indicated that the ground basically had no obvious deformation after the implementation of the roadway backfill method at 3101 working face.

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Measurement and numerical analysis of water-conducting fractured zone in solid backfill mining under an aquifer: a case study in China

Quarterly Journal of Engineering Geology and Hydrogeology ◽

10.1144/qjegh2016-018 ◽

2016 ◽

Vol 50 (1) ◽

pp. 81-87 ◽

Cited By ~ 7

Author(s):

Meng Li ◽

Jixiong Zhang ◽

Xuejie Deng ◽

Feng Ju ◽

Baiyi Li

Keyword(s):

Numerical Analysis ◽

Fractured Zone ◽

Backfill Mining ◽

Solid Backfill Mining

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Surface dynamic subsidence prediction model of solid backfill mining

Environmental Earth Sciences ◽

10.1007/s12665-016-5817-9 ◽

2016 ◽

Vol 75 (12) ◽

Cited By ~ 23

Author(s):

Xiaojun Zhu ◽

Guangli Guo ◽

Jianfeng Zha ◽

Tao Chen ◽

Qi Fang ◽

...

Keyword(s):

Prediction Model ◽

Subsidence Prediction ◽

Backfill Mining ◽

Solid Backfill Mining ◽

Surface Dynamic ◽

Dynamic Subsidence

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Roadway backfill method to prevent geo-hazards induced by room and pillar mining: a case study in Changxing coal mine, China

10.5194/nhess-2016-151 ◽

2016 ◽

Author(s):

Jixiong Zhang ◽

Meng Li ◽

Nan Zhou ◽

Rui Gao

Keyword(s):

Coal Mine ◽

Longwall Mining ◽

Room And Pillar Mining ◽

Working Face ◽

Movement Characteristics ◽

Filling Sequence ◽

Backfill Mining ◽

Backfill Materials ◽

Driving Task ◽

Pillar Mining

Abstract. Coal mines in the western areas of China experience low mining rates and induce many geo-hazards when using the room and pillar mining method. In this research, we proposed a roadway backfill method during longwall mining to target these problems. We tested the mechanical properties of the backfill materials to determine a reasonable ratio of backfill materials for the driving roadway during longwall mining. We also introduced the roadway layout and the backfill mining technique required for this method. Based on the effects of the abutment stress from a single roadway driving task, we designed the distance between roadways and a driving and filling sequence for multiple-roadway driving. By doing so, we found the movement characteristics of the strata with quadratic stabilisation for backfill mining during roadway driving. Based on this research, the driving and filling sequence of the 3101 working face in Changxing coal mine was optimised to avoid the superimposed influence of mining-induced stress. According to the analysis of the surface monitoring data, the accumulated maximum subsidence is 15 mm and the maximum horizontal deformation is 0.8 mm/m, which indicated that the ground basically had no obvious deformation after the implementation of the roadway backfill method at 3101 working face.

Download Full-text