Article
Geosciences, Multidisciplinary
Jian Hao, Anfa Chen, Xuelong Li, Hua Bian, Yongkui Shi, Xin Wang, Jiali Zhao, Haojie Liu
Summary: In this study, the strip-filling and second-mining technique was used to recover coal pillars without damaging the ground surface. The study conducted theoretical calculations and on-site surveys to determine an optimal scheme for mine goafs. The results showed that the technique was successful in controlling rock stratum stability and providing technical support for similar mines.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Construction & Building Technology
Xiaojun Zhu, Feng Zha, Guangli Guo, Pengfei Zhang, Hua Cheng, Hui Liu, Xiaoyu Yang
Summary: This study proposes a subsidence control design method for backfill-strip mining, analyzing the stability of composite support pillars and determining values of main subsidence influencing factors, predicting surface movement and deformation with the use of the PIM method, and optimizing subsidence influencing factors based on safety fortification index requirements. The method aims to ensure safety, increase resource recovery rate, and reduce mining costs in backfill-strip mining, providing scientific guidance for subsidence disaster control and engineering design.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Engineering, Environmental
Huaizhi Bo, Guangli Guo, Huaizhan Li, Yuezong Wang, Qian Jiang, Shaohao Hu, Fanglong Zhang
Summary: In order to achieve sustainable development of mining and protect ground buildings, backfill-strip mining has been gradually adopted. This paper uses numerical simulation method to study the surface movement characteristics of shallow coal seam backfill-strip mining under the hard roof. The results show that the maximum surface subsidence and the stress of the filling body are directly proportional to the width of the caving mining working face in a certain range.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Energy & Fuels
Zhihua Li, Ke Yang, Tingshuang Wei, Cheng Liu, Peng Zhou, Jianhua Miao
Summary: Through theoretical analysis, numerical simulation, and similar simulation, it is found that paste backfill mining can effectively control the movement of overlying strata and significantly reduce surface subsidence. Compared with caving mining, backfill mining significantly relieves strata pressure behaviors and narrows the mining influence distance.
ENERGY EXPLORATION & EXPLOITATION
(2023)
Article
Education, Scientific Disciplines
Chang Luo, Ping Liu, Yichao Jia, Zhen Chen, Fangling Gao, Xinkang Huang
Summary: By theoretical analysis, mechanical tests, and simulation, the strip interval filling mining technology was applied in the mining area to improve popularization and reduce filling cost. The optimal filling scheme of 3m interval 3m was determined, and it was found that this technology had a significant control effect on surface subsidence.
Article
Green & Sustainable Science & Technology
Yao Lu, Ning Jiang, Wei Lu, Meng Zhang, Dezhi Kong, Mengtang Xu, Changxiang Wang
Summary: A layered compaction test was conducted to investigate the deformation characteristics of filling gangue in different loading stages and states. The results showed that the deformation of gangue was more advanced in a natural state and more delayed under a water-bearing condition, with a special phenomenon of displacement rebound.
Article
Chemistry, Multidisciplinary
Guangyuan Song, Kai Du, Yidong Zhang, Zexin Li, Lei Hu
Summary: Green mining is important for achieving environmentally friendly and ecologically sound mining practices. This study focuses on the movement patterns of overlying strata in longwall fully mechanized mining with paste filling, establishing a mechanical model through mathematical analysis and studying the movement behavior through numerical simulations. The research reveals that filling mining exhibits reduced stress concentration, a smaller range of stress influence, and less deformation in the surrounding rock compared to traditional caving mining.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Qingliang Chang, Xingjie Yao, Qiang Leng, Hao Cheng, Fengfeng Wu, Huaqiang Zhou, Yuantian Sun
Summary: The study found that the filling rate is the main factor affecting roof and surface movement, while the filling body strength also plays a role. Through numerical simulation and field tests, guidelines for coal mining under similar geological conditions were derived.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Environmental
Meng Li, Yifan Peng, Jixiong Zhang, Cunli Zhu, Dan Ma, Peng Huang
Summary: This study investigates the influence of compressive deformation of backfill materials on strata movement and stress evolution in deep backfill mining. The results show that a smaller compression ratio of backfill materials leads to better control of overlying strata.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Jian Cao, Qingxiang Huang, Lingfei Guo
Summary: The study reveals the subsidence characteristics and overburden structure distribution areas of shallow coal seam mining in the Jurassic Coalfield, Western China, suggesting that the subsidence of overburden strata and soil layer depends on different factors and can be divided based on the subsidence situation of key strata and bedrock.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Yafei Yuan, Meinan Zheng, Huaizhan Li, Yu Chen, Guangli Guo, Zhe Su, Wenqi Huo
Summary: The present study proposes a three-dimensional deformation monitoring method that combines mining subsidence law with SAR imaging to better delineate the surface subsidence range in coal mining. By comparing with ground leveling measurements, the results show that the proposed method achieves higher monitoring accuracy in determining the mining impact area.
Article
Energy & Fuels
Qiang Zhang, Jixiong Zhang, Zhongya Wu, Yang Chen, Kangqi Xia, Hongdi Liu
Summary: This study focuses on the importance of dense body in solid backfill mining to restrain overburden strata movement, with density controlling the level of restraint. By analyzing the factors influencing density during backfilling and compacting, and establishing a relational expression of density, the mechanism of dense backfill body transformation from loose materials is revealed. The research shows that factors such as pileup height, tamping angle, tamping times, backfill equipment, materials, geological conditions, etc., play a significant role in determining the density of the compaction-formed gangue.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Geosciences, Multidisciplinary
Xiaoshuang Li, Yunmin Wang, Yunjin Hu, Changbing Zhou, He Zhang
Summary: This study compares the roof deformation and surface subsidence of room and pillar mining, cement backfill mining, and caving mining in phosphorite mining through numerical analysis. The results show that the caving method has the highest amount of roof and surface subsidence, while the backfill mining method has better control over slope stability.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
Yuesong Tang, Zhaohui Wang, Wenchao Sun, Wei Wang, Haixiao Yang
Summary: Under the guidance of green mining and scientific mining ideas, China has made research developments in strata movement and its control. The impact of mining activities on underground safety and the ground environment should be emphasized, and critical problems that need to be solved have been identified. Monitoring the movement of overlying strata and developing intelligent control techniques for overburden strata play a significant role in ensuring mining production safety.
Article
Environmental Sciences
Hongyu Ran, Yuxia Guo, Guorui Feng, Chunqing Li
Summary: This study investigated the mechanical properties of strip and column cemented gangue backfill bodies (CGBBs) through experiments and simulations, revealing that strip CGBB has higher strength and ductility under uniaxial compression compared to column CGBB. Increasing the length-height ratio improves the strength and ductility of strip CGBB.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)