In this database, the authors shared the raw experimental data associated with the article: Effect of curing temperature on time-dependent shear behavior and properties of polypropylene fiber-reinforced cemented paste backfill.

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High-flow low-expansion backfill materials have been developed to improve difficult slurry pipeline transport and the poor roof-contact effect of many filling materials. The fly ash content was fixed at 80%, and the content of mineral powder was 8.5% - 9.5%, lime was 8.5% - 9.5%, and desulfurized gypsum was 2% - 3%, with a sodium carbonate content of 0.9% - 1.2% and an aluminum powder content of 0.01% - 0.02%. The prepared backfill material processed good fluidity, and the expansion rate of the hardened material reached 2% - 3%, and the compressive strength at 90 d reached 4 MPa - 5.5 MPa. SEM observations indicated that as the aluminum content increased, the ettringite on bubble walls transformed from a fine-needle to a needle-rod shape. Secondly, the hydration products of the system were mainly hydrated calcium silicate gel and ettringite, which interconnected and promoted the formation of the structure. The backfill material had extensive sources of raw materials, low cost, and a simple filling process and good filling effect.

The applications of gob-side entry retaining (GER) techniques tends to increase over time as it can increase the minerals recovery rate and reduce the output of the waste. In the literature, only the performance of the roadside backfill body (RBB) at gob-side entry retaining under static loading has been investigated. However, failure mechanisms of the RBB under dynamic loading with various roof cutting angles have not been addressed. This study presented a numerical simulation of the fracture propagation and distribution in the roadside backfill body along the gob-side under combined static and dynamic loadings using the Trigon model built in UDEC (Discrete element methods) software. The influence of the roof cutting angles on the behavior of the RBB was also discussed. The input parameters were determined by back analysis with the field data. Results of the model show that static loading is a bigger contributor to the failure of the RBB compared to the dynamic loading. Several clear fractures were observed at top left and bottom right of the RBB and the fracture was more intensive at top left. In addition, it was found that if the roof cutting angle is 70°, the influence of the dynamic loading on the RBB is minimum, and the area and severity of the shearing failure in the RBB is minimum as well. As a result, it was determined the optimal roof cutting angle was 70° and a combined support measure of "roof cutting + roof support above RBBs + RBB reinforcement" is proposed. The application of roof cutting in gob-side entry retaining (RCGER) techniques in the Lingzhida coal mine indicates that deformation of the surrounding rocks can be effectively controlled.

The Mine Backfill Services Market Size Was Worth USD 5.37 Billion in 2023 and Is Expected To Reach USD 11.66 Billion by 2032, CAGR of 9.00%.

Eximpedia Export import trade data lets you search trade data and active Exporters, Importers, Buyers, Suppliers, manufacturers exporters from over 209 countries

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The Air Backfill Tamper market has become an essential component within the construction and civil engineering industries, providing a reliable solution for compacting soil and backfill materials to enhance stability and support structures. Characterized by its pneumatic operation, the air backfill tamper offers eff

This is the dataset used for the paper "Microbial hydrogen sinks in the sand-bentonite backfill material for the deep geological disposal of radioactive waste", submitted for publication in December 2023.

The research aims to explore the influences of lithology on the compaction behaviours of broken waste rocks. For this purpose, a WAW1000D servo test machine and a self-made bidirectional loading test system for granular materials were used to conduct axial and lateral compaction tests on four typical types of broken waste rocks: sandstone, mudstone, limestone, and shale. On this basis, we analysed the relationships between lateral and axial stress with the strain in, and porosity of, the four types of broken waste rocks. In addition, the relationship of axial stress with lateral stress and lateral pressure coefficient, and the changes in the particle size distribution of broken waste rocks before, and after, compaction were discussed. The test results demonstrated that the samples of higher strength were found to have low lateral and axial strains as well as a lower porosity in axial and lateral loading tests; while samples of lower strength showed low lateral stress and lateral pressur...

The benchtop backfill sand rammer market is experiencing steady growth, driven by increasing demand across various industries. While precise market sizing data is unavailable, considering the typical growth trajectory of specialized industrial equipment and referencing similar markets, a reasonable estimate for the 2025 market size could be placed between $100 and $150 million USD. This estimation accounts for the ongoing adoption of advanced manufacturing techniques and a continuous need for efficient and precise sand-packing solutions in sectors like electronics, precision engineering, and foundries. A compound annual growth rate (CAGR) of 5-7% over the forecast period (2025-2033) seems plausible, aligning with the growth of related markets. This growth is fueled by technological advancements leading to improved rammer efficiency and precision, alongside increasing automation in production processes across industries. Key trends include miniaturization of equipment for improved workspace efficiency, integration of smart features for data monitoring and process optimization, and a growing focus on environmentally friendly manufacturing practices that impact material selection and production processes. Restraints include the relatively niche nature of the market, high initial investment costs for sophisticated equipment, and potential competition from alternative sand-packing methods. The competitive landscape is fragmented, with key players like Jet Tools, Simpson Technologies, Frölich & Klüpfel, Ingersoll Rand, Chicago Pneumatic, Welton, Spitznas, Versatile Equipments, and NPK holding significant market share. These companies are actively engaged in developing innovative products and expanding their geographic reach to capitalize on market growth. Future market success will depend on the ability of these manufacturers to offer superior product quality, competitive pricing, robust after-sales service, and effective marketing strategies to reach diverse customer segments. The market is likely to witness further consolidation as larger players acquire smaller companies to expand their product portfolio and market presence. Regional variations in market growth will be influenced by factors such as industrial development, technological adoption, and regulatory frameworks in different regions.

The Continuous Mining Backfill Equipment market plays a crucial role in the mining industry by facilitating the efficient and sustainable extraction of mineral resources. This specialized equipment is designed to support the backfilling of mined-out areas, which not only enhances the stability of the mine but also m

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Environmental Impact Statement: Kemps Creek reclamation project, raw materials extraction and backfill operation, Elizabeth Drive : Assessment of traffic implications

These documents regard a proposed backfill project for Compound B at the Casa Grande Ruins National Monument. There is a form for assessment of actions the would affect cultural resources. There are 2 detailed sketch maps, one showing the entire monument detailing all sites and features and another detailing Compound B and all its structures.

The Air-Powered Backfill Tamper market plays a crucial role in various construction and engineering projects, providing an effective solution for compacting soil and backfill materials. This essential equipment is predominantly used in industries such as civil engineering, landscaping, and utility installations, whe

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Filling mining technology is an important representative technology to realize green and low-carbon mining. The backfill materials have distinct rheological characteristics under the long-term action of formation loads and groundwater seepage. In order to study the creep characteristics of backfill materials under different moisture contents and reveal their aging-mechanical properties, based on the Riemann-Liouville fractional calculus and damage mechanics theory, the fractional element and damage variables are introduced to improve the traditional Bingham model, and the fractional Bingham creep damage model is proposed. Based on the experimental data of gangue cemented backfill under different moisture content, the parameters of the creep model are obtained by using user-defined function fitting and the least square method. The results show that the improved Bingham fractional creep damage model can describe the whole creep process of backfill materials under different moisture contents, and the rationality of the model is verified. Compared with the traditional Bingham model, the fitting degree of the Bingham fractional creep damage model is higher, which solves the problem that the traditional Bingham model cannot describe the nonlinear creep stage. Model parameter α and ξ increase with the increase of axial stress and moisture content. Under the same moisture content, η gradually increases with the increase of axial stress. This work has a certain reference significance for studying the mechanical properties and creep constitutive model of backfill materials containing water.

Historical ILI: Uncertainty quantification of ARLR method’s nowcast (one-week ahead forecast) using historical (without backfill) ILI data for 3 different forecast weeks.

Filling mining technology is an important representative technology to realize green and low-carbon mining. The backfill materials have distinct rheological characteristics under the long-term action of formation loads and groundwater seepage. In order to study the creep characteristics of backfill materials under different moisture contents and reveal their aging-mechanical properties, based on the Riemann-Liouville fractional calculus and damage mechanics theory, the fractional element and damage variables are introduced to improve the traditional Bingham model, and the fractional Bingham creep damage model is proposed. Based on the experimental data of gangue cemented backfill under different moisture content, the parameters of the creep model are obtained by using user-defined function fitting and the least square method. The results show that the improved Bingham fractional creep damage model can describe the whole creep process of backfill materials under different moisture contents, and the rationality of the model is verified. Compared with the traditional Bingham model, the fitting degree of the Bingham fractional creep damage model is higher, which solves the problem that the traditional Bingham model cannot describe the nonlinear creep stage. Model parameter α and ξ increase with the increase of axial stress and moisture content. Under the same moisture content, η gradually increases with the increase of axial stress. This work has a certain reference significance for studying the mechanical properties and creep constitutive model of backfill materials containing water.