The practical application of biomimetic soil in engineering involves injecting a slurry-form soil into the gaps between coal gangue, creating an integrated biomimetic soil-gangue …
Particle flow simulation of broken gangue backfill materials can be used to effectively study the bearing-compression characteristics of gangue backfill materials. The 3D reconstruction of the digital model for the real shape of the irregular gangue blocks is crucial for the numerical simulation of particle flow to accurately express the spatial and …
In SBCM, the solid backfilling material, such as crushed gangue particle material (CGPM), loess, aeolian sand and coal ash are backfilled into the underground goaf to bear the overburden load and control the overburden movement.
Exploiting the use of the soil remediation effects of coal gangue and modified coal gangue will help further improve the comprehensive utilization value of …
Coal gangue is one of China's main industrial solid wastes, which contains various harmful heavy metal elements, such as lead (Pb). The long-term accumulation of coal gangue causes Pb to migrate to the surrounding environment due to weathering and rain erosion, eventually endangering human life and health with its continuous …
Coal mining causes serious ecological and environmental damage. The crushed gangue is backfilled into underground goaf, which not only inhibits mining-induced subsidence but also reduces accumulation of waste on the ground: however, the effects of backfilling with gangue backfill materials in goaf are affected by a combination …
To prepare the crushed gangue samples with the gradation shown in Figure 2, first the crushed gangue was sieved into 10 particle size intervals by using the new standard soil sieve according to ...
Overall, to enhance the soil water storage capacity in mining areas, the results suggest that coal gangue mulching with a thickness of 8–16 cm and particle size …
To study the deformation characteristics of crushed gangue under different water content conditions, the confined compaction test of crushed gangue was carried out under five different water content …
The collection of soil from other places for land reclamation has become a commonly used technology for ecological restoration of coal-mining areas in China. The purpose of this study was to use coal gangue as a new type of planting substrate component, with the goal of replacing soil to solve the increasing shortage of land …
As a massive solid waste, the high value-added utilization of coal gangue has received more and more attention in China. This study focuses on the utilization of coal gangue aggregate in railway engineering for coal transportation passage. Coal gangue aggregate was employed as high-grade railway subgrade filler andprepared concrete for …
Coal gangue refers to the waste or by-product produced when coal is extracted from coal mines. These wastes usually include coal gangue (without valuable crushed coal and gangue), rocks, soil, and other minerals. The composition and mineral content of coal gangue can vary depending on the type of coal mine and geographic …
Coal gangue is crushed and then backfilled into the mining goaf as the support for the overburden strata with the purpose of controlling strata movement and surface subsidence [ 9 ]. However, gangue is granular media and consists of particles having different sizes and shapes (angularity).
The excessive accumulation of coal gangue leads to significant land resource depletion, resulting in soil erosion, landslides, mudslides, and other geological hazards. The gangue contains a significant quantity of pyrite and coal, as well as other substances that can combust or promote combustion. Over time, under suitable environmental ...
Study on the macro–micro evolution of compaction characteristics of coal gangue with different grain sizes under side-limit compression conditions
The crushed gangue in the sample will come into local mutual touch when the amount of hard crushed gangue grows to a specific point. The formation of a stable …
The formation and regulation mechanism of pores structure of soil matrix prepared by fluidized calcination of coal gangue is as follows: The oxidation reaction of carbon and the decomposition of minerals in coal gangue will form pore structures.
Coal gangue (CG), an industrial solid waste with high contents of Li and Ga, has attracted the attention of researchers. However, the utilization of CG remains an economic challenge. Pre-enrichment of Li and Ga by flotation was carried out with a view to improving the comprehensive utilization of CG. Mineral composition, time-of-flight …
The technology of filling goaf with coal gangue slurry is to make gangue into granular aggregate with a specific particle size gradation by crushing, screening, and other technical means, mixing ...
When the coal gangue directly applied in soil for fertilizer, the toxic elements entered into soil. When plants are stressed by heavy metals, various physiological and …
The influence of block shape on the macro deformation response and meso-fabric evolution of crushed gangue under triaxial compression was studied. The main conclusions are as follows: Li et al. (2020a) [1] the more irregular the block shape, the higher the natural accumulation void ratio of the crushed gangue sample.
Overall, to enhance the soil water storage capacity in mining areas, the results suggest that coal gangue mulching with a thickness of 8–16 cm and particle size range of 0.5–2 cm is suitable.
Consequently, gangue waste piles have become one of the main sources of environmental pollution [8], [9]. To improve the mining environment and safety, gangue backfilling is widely applied [10], [11]. As a primary type of backfilling material, broken coal gangue is gradually compacted by overlying strata when backfilled into the mining goaf.
Soil reconstruction mode of 30% coal gangue ratio and 5-8 mm coal gangue particle size was the best condition for plant growth, indicating that coal gangue could change soil water content and structure stability of aggregate. The soil reconstruction mode of 30% coal gangue ratio and 5-8 mm coal gangue particle size was recommended.
Coal gangue is deployed adjacent to mining land and has characteristics similar to those of the soils of these areas. Coal gangue–soil ecosystems provide habitats for a rich and active bacterial community. However, co-existence networks and the functionality of soil and coal gangue bacterial communities have not been studied.
In this paper, the physical, chemical and pollution characteristics of coal gangue are summarized, and the ecological restoration mode is divided into two modes: traditional "end treatment" and "treatment while piling". The action mechanism, advantages and disadvantages and application scope of various ecological restoration technologies ...
Soil Fe was 3.4 times higher in GP and CK-near than in CK-far. The excess sulfur and Fe elements and the acidified soil drove changes in soil and vegetation in the …
In the present work, the impact crushing tests were conducted to obtain the effects of sizes, gangue mixture ratios, and crushing velocities on the fractal characteristics of the crushed PSD characteristics, using an in-house designed device.
This review article also provides insights into CG's potential applications including its use as a subgrade and subbase material in pavements, landfill liner material, and filter material for hydraulic structures. The sustainability benefits attainable through CG utilization in geotechnical and geoenvironmental applications are also highlighted.
In this paper, by mixing coal gangue and fly ash with straw in different ratios to prepare compound soil substrate and growing lettuce, the effects of different ratios of the three wastes and coal ...
The results show that: (1) The seepage process of gangue slurry in the goaf simulation test is divided into three diffusion forms, namely radial diffusion, axial diffusion, and bidirectional ...
Contribute to chengxinjia/sbm development by creating an account on GitHub.
Coal gangue is crushed and then backfilled into the mining goaf as the support for the overburden strata with the purpose of controlling strata movement and surface subsidence [9]. However, gangue is granular media and consists of particles having different sizes and shapes (angularity).
It systematically elaborated on the concept of the subsequent space gangue grouting filling method and provided the spatial layout approach for the subsequent space gangue grouting filling system. The challenges in the development of gangue grouting filling materials and the technology for grouting borehole layout were thoroughly examined.
Abstract. The amount of coal gangue, a by-product of coal mining and washing, is rapidly increasing with the growing trend of energy consumption. The accumulated coal gangue without appropriate utilization has resulted in a squander of resources, waste disposal and environmental pollution issues. Over the past few …
Coal mining causes serious ecological and environmental damage. The crushed gangue is backfilled into underground goaf, which not only inhibits mining …
After rainwater leaching, the metal ions in coal gangue migrate into the surrounding soil, posing significant threats to human health and ecosystems. To remove Cd from contaminated soil surrounding a coal gangue pile area, loofah, oak chips, and corn stalks were used as raw materials to prepare loofah hydrothermal carbon (LH), oak chip ...
