Paste backfill mining is an significant part of green coal mining, which can improve resource utilization and extend the service life of mines. It is important for solving the "three under, one above" mining problem and avoiding industrial wastes such as coal gangue and fly ash that occupy farmland and pollute the environment. To address the …
Caving mining method could lead to massive waste rocks hauled to surface while leaving a large void in underground. This would eventually result in the surface subsidence and damage to the environment and surface infrastructures. In this study, we proposed three different backfilling methodologies t …
The mine adopts medium-deep hole sublevel open stoping with subsequent backfilling mining method. Before backfilling, the flexible retaining wall is used to block the goaf. Due to the weak initial strength of the retaining wall, the filling height before the filling body height reaches the retaining wall height is low.
Using a 2D physical simulation experiment, a comprehensive analysis method and engineering design concept for the stability control of overlying multi-tunnels with backfill mining are put forward based on further research of the deformation characteristics of multi-tunnels using caving and backfilling method.
To solve the problems caused by the high-intensity mining of coal, scholars in China proposed a coal mining method with backfilling of goafs [13,14,15,16]. Backfill materials prepared with solid wastes, …
Wongawilli roadway backfilling coal mining method 347 Typically, the average mining speed in a MR was about 20 m/d with the average filling speed in a MR was about 40 m/d; thus, the filling work ...
Backfill mining, an environmentally friendly mining method, has emerged as a viable solution, offering the potential to ensure mining safety, reduce environmental …
This paper investigates the path planning problem of the coal mine solid-filling and pushing mechanism and proposes a hybrid improved adaptive genetic particle swarm algorithm (AGAPSO). To enhance the efficiency and accuracy of path planning, the algorithm combines a particle swarm optimization algorithm (PSO) and a genetic …
Backfill is widely used around the world to fill the man-made voids created in the underground environment once ore has been mined out and removed. Its function is to …
Gao (2002) experimentally investigated the application of the sublevel stope delayed backfilling method at the Tonglvshan copper mine. Xiao (2005) conducted a physical modeling of high-level large-diameter long-hole mining at the Anqing copper mine to optimize the mining sequence.
The "mining-backfilling-keeping" method is a coordinated mining method of the partial mining, partial backfilling and partial retention of coal pillars, which mainly construct a stable joint pillar-backfilling support body with the original coal pillars as the core and several independent non-sufficient backfilling units to control the ...
Backfill tailings need to be dewatered, causing higher operating expenses for production and transportation. Discover the importance of backfilling in mining, a crucial process for stability, reduced environmental impact, and safety in underground mines.
This paper discusses the stope parameters of the sublevel subsequent filling stage in Daye Iron Shizishan section. According to the similar material simulation technology, which is the main means, displacement monitoring and internal stress monitoring, several conclusions are summarized as bellow: When the parameter of the …
The overall proposition of this research is to develop a brand-new CO2 physical and chemical sequestration method by using solid waste of coal mining and cementitious material which are widely ...
Backfill mining, an environmentally friendly mining method, has emerged as a viable solution, offering the potential to ensure mining safety, reduce environmental pollution stemming from tailings stockpiles, and enhance ore resource recovery. ... The effect of backfilling materials on the deformation of coal and rock strata containing …
Nowadays, the solid backfilling mining technology has been valued as an important technical mean of green mining. However, due to the complicated geological conditions, effective and efficient methods to monitor the deformation of the solid backfilling baby, are lacking in solid backfilling mining. Among various methods …
The open stoping mining method is generally used in sublevel, long hole or blast hole stoping. Presently, most of the open stoping methods are used in conjunction with backfilling ... The efficiency of this backfilling method depends on how freely numerous mining operations can take place without interfering with one another. …
The best backfill method is hydraulic fill, requiring deposition techniques that allow a viscous paste to be transported and deposited in emptied ore spaces. Dilution control is generally easier with this method.
Water conservation in mining is the key to solving the conflict between coal resource exploitation and ecological environment protection, especially in arid and semi-arid mining areas. Continuous excavation and continuous backfilling (CECB) in longwall mining is an important method to realize water conservation mining. Considering the …
Underground resource exploitation has seriously damaged the surface ecological environment and underground water system. As an effective control measure, the filling mining process has greatly reduced the surface subsidence. As a branch of the filling mining process, the continuous mining and continuous backfilling (CMCB) …
Rock Backfill Method. When extraction of economic minerals considers deeper ground, number and volume of voids including stopes, goaf, and goab increases conventionally, …
French Lorraine iron ore accounts for 94% of the total production, while 58 mines in Lorraine are mined by the room-and-pillar method. In the United States, the method is used by 65 percent of ...
Using backfilling for mined-out stopes has been widely used in underground mines over the past several decades. In many underground mines, cemented rockfill (CRF) as backfill material is common [1,2].Cemented rock fill (CRF) allows for the full recovery of an orebody while achieving global mine site stability [3,4,5,6].In order to achieve these …
Sublevel shrinkage (SLSh) is an underground mining method similar to sublevel caving (SLC) but with continuous backfilling from the top. It features a top-down mining sequence with production drifts orientated in a longitudinal or transverse way in the orebody. Fan drilling and blasting is done from the production drifts, from where the ore …
Taking the Huayuan Coal Mine as an example, the strip mining was originally designed to mine a 40 m strip and leave an 80 m coal pillar. By this method, the mining rate was less than 32%. It could …
Table 2 showes the general selection range of backfill strength for different mining methods. Table 2. Filling body strength selection table of different filling mining methods. ... Research status and perspectives of the application of artificial intelligence in mine backfilling. J. China Coal Soc., 46 (2) (2021), pp. 688-700. View in Scopus ...
Affected by coal mining activities, the remaining coal pillars are very likely to be destabilized and cause safety accidents. The backfilling of the remaining goaf can maintain the stability of the coal pillar well, but the coal pillar in the unfilled zone may still be unstable. In this paper, the effect of backfilling materials on coal pillars and the …
Zhang et al. (2017b) summarized the mining technology of a near full-rock protective coal seam, a gas drainage method and the key techniques of fully mechanized gangue backfilling, and the ...
Cut-and-fill is a mining method that backfilling the goaf with filling material is adopted to the ground pressure management with the advancement of mining operation. Brief History. Cut-and-fill mining method was developed based on filling technique, and the upward cut-and-fill stoping method was first mainly used for dry rock fill. ...
The dynamic subsidence disaster caused by underground mining of coal resources is a complex spatiotemporal process, which is a common disaster in mining areas. The backfilling strip mining technology is a green and sustainable coal mining method, which has been commonly used to reduce the subsidence disaster of the …
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