Article
Environmental Sciences
Bin Xu, Zhongwen Yue, Yongliang Li, Shushuai Wang, Jin Li, Bin Lu
Summary: Underground resource exploitation has caused significant damage to the surface ecological environment and underground water system. The continuous mining and continuous backfilling (CMCB) method, as a branch of the filling mining process, effectively addresses the contradiction between mining and filling. Research findings indicate that the filling ratio of even number lane (FRE) has an impact on overburden deformation and roof control function. Measures such as differential FRE, differential strength, non-uniformity of filling lane, and synergistic bearing of temporary support and backfill can reduce deformations and internal cracks in the surrounding rock.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Qiang Zhang, Kang Yang, Jixiong Zhang, Qi Wang, Longfeng Yuan, Zengzhu Shi, Xiling Xu
Summary: This study explores the self-stability of roofs in backfilling mining. It establishes mechanical analysis models and proposes engineering control methods. The research shows that the self-stability of roofs is greatly influenced by the elastic foundation coefficient of backfill, and less influenced by the support peak load. The unsupported-roof distance has no obvious effect on self-stability, while the working face and coal-pillar length along the dip significantly affect it.
APPLIED SCIENCES-BASEL
(2022)
Article
Mining & Mineral Processing
Xianjie Du, Guorui Feng, Min Zhang, Zehua Wang, Wenhao Liu
Summary: This article proposes a low backfilling rate constructional backfilling coal mining (CBCM) method to reduce the cost of backfilling coal mining. Through modeling and numerical simulation experiments, the stability and control effect of CBCM are analyzed. The research results demonstrate that CBCM has significant economic benefits in reducing backfilling costs.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Hejian Yin, Guangli Guo, Huaizhan Li, Zhongya Wu
Summary: This paper introduces the environmental advantages of backfilling mining and proposes an intelligent optimization design method that can quickly find the optimal compressed ratio that satisfies the constraints, reducing production costs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Wenlong Li, Shihao Tu, Hongsheng Tu, Xun Liu, Kaijun Miao, Hongbin Zhao, Jieyang Ma, Long Tang, Yan Li
Summary: The mining speed has obvious effects on the rock burst risk, and an unreasonable mining speed can cause rock burst accidents. This study proposes the key energy strata principle and a new assessment method using an energy index to evaluate the rock burst risk considering the mining speed effect. The application results demonstrate that the method provides a mining speed that meets the demands of safe and high-efficiency production.
Article
Mining & Mineral Processing
Peng Huang, Jixiong Zhang, Xingjie Yan, Anthony John Spencer Spearing, Meng Li, Shiwei Liu
Summary: A new mechanical model for solid backfill mining was established in this study, taking into account the time-dependent deformation characteristics of gangue. Compared with the traditional elastic foundation model, the proposed fractional order viscoelastic foundation model showed higher accuracy, with plate deflection and bending moment increasing by 50.9% and 37.9%, respectively, after 100 days.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Ming Tao, Yan Zhao, Jiang Guo
Summary: This study investigates the reasonable roof-contacted filling rate (RCFR) of the backfill in the goaf of a deep mine using a three-hinged arch mechanics model. The stress expressions of the goaf roof with different RCFRs were derived, and numerical simulations were conducted to analyze the influence of RCFR on the stress state of the roof. The results show that vertical stress affects the stress state in room-stopes and pillar-stopes, while horizontal stress mainly affects the stress state in room-stopes. The RCFR in room-stopes significantly influences the formation of the self-stable arch in pillar-stopes. In the Dongguashan Copper Mine, an actual RCFR of approximately 80% achieved safe and stable uninterrupted mineral resource recovery.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Chemistry, Multidisciplinary
Tingcheng Zong, Gaolei Zhu, Qiang Zhang, Kang Yang, Yunbo Wang, Yu Han, Haonan Lv, Jinming Cao
Summary: In coal mining, the efficiency of solid backfilling technology is hindered by various factors, leading to the proposal of an optimization scheme to synchronize coal mining and backfilling operations.
APPLIED SCIENCES-BASEL
(2023)
Article
Multidisciplinary Sciences
Xing-ping Lai, Shuai Zhang, Peng-fei Shan, Feng Cui, Yan-bin Yang, Rui Bai
Summary: By using different in-situ modification measures, the properties of rocks can be effectively controlled, and hard-rock softening or soft-rock hardening can be achieved by changing the physical and mechanical parameters of rock samples. In rock burst prevention, filling materials such as non newtonian fluid can increase the energy of the post-peaking phase of rocks and slow down the intensity of energy release.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Hengyu Su, Chang Luo, Yichao Jia, Ziyi Wang
Summary: This study proposes a strip structure filling mining technology to address the environmental issues caused by mining activities in a mine in Guizhou, China. Through various tests and simulations, it is found that this technology can effectively reduce surface subsidence and landslides while maintaining the strength of the filling material. The laboratory and numerical results are consistent with the engineering measurements, demonstrating the reliability of this mining technology.
SCIENTIFIC REPORTS
(2023)
Article
Green & Sustainable Science & Technology
Qingliang Chang, Yifeng Sun, Qiang Leng, Zexu Liu, Huaqiang Zhou, Yuantian Sun
Summary: By establishing a mechanical model and using numerical simulation, the study analyzed the impact of paste false roof thickness on the stability of underground coal mines, determining the optimal thickness to be 3.2 meters.
Article
Geochemistry & Geophysics
Wenjie Liu, Ke Yang, Xiang He, Zhainan Zhang, Rijie Xu
Summary: This study analyzes the dynamic instability mechanisms of the gob-side roadway surrounding rock in Boertai Coal Mine, Shendong, China, through field research, theoretical analysis, and numerical simulation. The results show that high static stresses accumulate in the surrounding rock of the gob side roadway, which can easily induce dynamic disasters.
Article
Construction & Building Technology
Zhi-Yong Fu, Xu-Fei Gong, Peng-Fei Zhang, Cun-Wen Wang
Summary: Optimizing the mining scheme is crucial for improving recovery efficiency of filling mining. The mining face width and roof subsidence are influenced by unit weight and mining depth, but less affected by the elastic modulus of the roof. Reasonable mining face width can be determined through an optimization equation to enhance recovery efficiency.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Daoyong Zhu, Huyue Zhang, Yi Su
Summary: A mechanical model was established to analyze the instability and failure of a roadway in the Dianping coal mine working face under the condition of traditional gob-side entry retaining. The proposed roof-cutting type gob-side entry retaining technology effectively reduced side abutment pressure and decreased roadway deformation. This technology has important applications in addressing roadway stability issues in coal mines.
Article
Environmental Sciences
Cunli Zhu, Jixiong Zhang, Taheri Abbas, Nan Zhou, Zejun Li, Meng Li
Summary: This study evaluated the impact of solid waste backfilling mining in reducing ground surface deformation and displacement of overlying strata. Comparative analysis was conducted on the mechanical characteristics of different cemented paste backfills. Numerical simulations and experiments showed that CPB mining effectively reduced surface movement and subsidence. The research provides theoretical and technical support for coal mining in similar conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Dan Ma, Jixiong Zhang, Hongyu Duan, Yanli Huang, Meng Li, Qiang Sun, Nan Zhou
Summary: Gangue backfilling mining (GBM) can effectively alleviate gangue pollution and protect overburden aquifers. The hydraulic properties and deformation behaviors of granular gangues were studied, showing that these properties vary with the original grain size grade and stress rate. An improved model based on fractal dimension was found to have better accuracy in predicting permeability evolution compared to the traditional Kruger model.
Article
Green & Sustainable Science & Technology
Hengfeng Liu, Qiang Sun, Nan Zhou, Zhongya Wu
Summary: This paper analyzes the main failure mode and process of coal pillars in room mining, and examines the impact of different sizes of coal mining pillars and progressively unstable coal pillars on the tunnel. By using technologies such as cemented paste backfilling and reinforcement of residual coal pillars, the stability degree of residual coal pillars and key aquiclude strata are evaluated.
Article
Construction & Building Technology
Shenyang Ouyang, Yanli Huang, Nan Zhou, Junmeng Li, Huadong Gao, Yachao Guo
Summary: The study investigated the early hydration characteristics and strength evolution of sand-based cemented paste backfill materials. It showed that the hydration process can be divided into several stages, leading to the formation of specific hydration products and an increase in mechanical strength and elastic modulus over curing age. The study also constructed hydration models for the materials, providing insights into their hydration behavior.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Baiyi Li, Jixiong Zhang, Hao Yan, Nan Zhou, Meng Li
Summary: This article investigates the thermal conductivity of gangue-cemented paste backfill through laboratory tests and analyzes the influences of mix proportion parameters and water saturation degree. The results show that the water/binder ratio significantly affects the thermal conductivity, while the cement amount has little influence. Moreover, there is a linear positive correlation between thermal conductivity and water saturation degree.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Energy & Fuels
Nan Zhou, Erbao Du, Meng Li, Jixiong Zhang, Chaowei Dong
Summary: Through numerical simulation and theoretical analysis, this study analyzed the non-uniform deformation characteristics of RPMG roof for the first time, revealing that coal pillars were subjected to non-uniform stresses and underwent different states of stress under eccentric loads. Taking the No. 19 coal pillar as an example, the study showed that it did not collapse under the applied shear stress, providing a theoretical basis for controlling pillar stability in RPMG.
Article
Environmental Sciences
Nan Zhou, Jianfei Xu, Jixiong Zhang, Hao Yan, Cunli Zhu, Meng Li
Summary: In this study, the permeability of sand-based cemented backfill (SCB) under different mix ratios was analyzed through a large number of experiments. It was found that variations in quicklime and fly ash contents significantly influenced the permeability of SCB, while variations in cement and water reducing agent contents had a minor impact. Additionally, it was discovered that the permeability of SCB was positively correlated with porosity, pore size, and compactness of surface structure.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Energy & Fuels
Baiyi Li, Jixiong Zhang, Hao Yan, Nan Zhou, Meng Li, Hengfeng Liu
Summary: Thermal energy storage in underground mines with different rock formations is influenced by the surrounding rocks, which can either improve or decrease the energy performance.
Article
Energy & Fuels
Hao Yan, Jixiong Zhang, Nan Zhou, Peitao Shi, Xiangjian Dong
Summary: This paper proposes a new hybrid intelligent model based on firefly algorithm, sparrow search algorithm, and support vector machines for predicting the permeability alteration of coal during CO2 geological storage. The results show that the model has good accuracy and can provide guidance for promoting and applying CO2 storage technology.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Energy & Fuels
Qiang Sun, Ruhong Bai, Limin Fan, Yuzhuo Jiang, Nan Zhou, Jixiong Zhang
Summary: This paper examines high-yield coal mining and ecological environment protection in ecologically fragile mining areas in Western China. It proposes a green and sustainable filling coal mining method and analyzes the mechanical compaction properties of solid waste gangue, eolian sand, and loess in these areas. Through a case study in a coal mine in Inner Mongolia, China, it finds that mining height and backfill materials' compaction ratio are key indices influencing the stability of Quaternary aquifers, ecological water level evolution, and surface vegetation production.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Energy & Fuels
Hengfeng Liu, Alfonso Rodriguez-Dono, Jixiong Zhang, Nan Zhou, Yanjun Wang, Qiang Sun, Luobin Zhang
Summary: This paper proposes an innovative method for geothermal-coal synergetic mining, which utilizes coal-based solid waste to create a cemented paste backfill material. This approach aims to reduce environmental damage and achieve a low-carbon energy structure.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Environmental Sciences
Cunli Zhu, Jixiong Zhang, Taheri Abbas, Nan Zhou, Zejun Li, Meng Li
Summary: This study evaluated the impact of solid waste backfilling mining in reducing ground surface deformation and displacement of overlying strata. Comparative analysis was conducted on the mechanical characteristics of different cemented paste backfills. Numerical simulations and experiments showed that CPB mining effectively reduced surface movement and subsidence. The research provides theoretical and technical support for coal mining in similar conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Lingling Shen, Jixiong Zhang, Meng Li, Nan Zhou, Qiang Zhang, Yang Hao
Summary: The treatment of coal slime water (CSW) is challenging due to higher ash content and finer particle size, which can lead to environmental pollution and resource waste. CSW prepared for backfilling material can overcome these disadvantages. Pretreatment methods such as NaOH treatment, combined ultrasonic-NaOH, and plasma electrolysis were conducted to investigate their effect on curing time. The results showed that these pretreatments can accelerate the curing time of backfill slurry, promote hydration and cementation performance, improve hydrophobicity, and enhance water absorption ability. These findings provide technical support for the rapid and efficient preparation of backfilling materials using CSWs.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Chemistry, Multidisciplinary
Weijian Song, Jixiong Zhang, Meng Li, Hao Yan, Nan Zhou, Yinan Yao, Yaben Guo
Summary: This paper summarizes the methods and application status of coal gangue backfilling, and analyzes the methods and state-of-the-art technologies that meet the mining demands in Middle and Western China. The study shows that implementing these technologies can significantly increase the disposal capacity of coal gangue and reduce environmental hazards.
APPLIED SCIENCES-BASEL
(2022)
Article
Geosciences, Multidisciplinary
Yinan Yao, Pengfei Jiang, Nan Zhou, Erbao Du
Summary: This paper presents the short-wall coordinated filling mining (SCFM) method for the mining of thick coal seams under water shortage conditions in the northwest region of China. Stress analysis and design of key parameters for the mining process were conducted, and it was found that the sensitivity of the maximum tensile stress in the roof to the length of the working face is better than the filling rate in the case of short-walled working face arrangement. The results show that the proposed method can achieve safe and efficient recovery of coal resources while conserving water in strongly water-rich rock formations.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Environmental Sciences
Chaowei Dong, Nan Zhou, Jixiong Zhang, Wanan Lai, Jianfei Xu, Junlin Chen, Runhua Yu, Yepeng Che
Summary: A novel gangue based geopolymer adsorbent (GPA) was prepared using pretreatment gangue (PG) as the main raw material for the removal of Cd(II) from wastewater. The optimized conditions for GPA adsorption were found using the hybrid response surface method and gray wolf optimization (RSM-GWO) algorithm. The study concluded that GPA is a lucrative adsorbent material for effective Cd(II) wastewater treatment, complying with the high value-added usage of solid wastes and waste to cure poison green sustainable development direction.
ENVIRONMENTAL RESEARCH
(2023)
