Article
Geosciences, Multidisciplinary
Di Hou, Mengchao Xu, Xiaoshuang Li, Jiawen Wang, Menglai Wang, Shujian Li
Summary: This study focuses on the mining challenges faced in the Kunyang Phosphate Mine No. 2 in China. By conducting on-site research, engineering comparisons, and theoretical analysis experiments, the study suggests that the pseudo inclined segmented strip filling method should be prioritized as the main mining method for gently inclined phosphorus deposits. The study also provides theoretical calculation methods for determining the filling capacity of the mine, offering technical guidance for mining design and equipment selection.
FRONTIERS IN EARTH SCIENCE
(2023)
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
Geochemistry & Geophysics
Xingping Lai, Yanbin Yang, Leiming Zhang
Summary: This study investigated the impact of repeated mining on the evolution of overlying strata fissures in steeply inclined and extra thick coal seams, established a physical similarity simulation model, and studied the evolution rules of overlying strata structure using the energy and frequency of microseismic events, revealing precursor characteristics of overburden instability and failure.
Article
Chemistry, Multidisciplinary
Yang Zhou, Xueyi Yu
Summary: This study comprehensively analyzed the caving characteristics of thick hard overburden and the evolution of water-conducting fracture zones in fully mechanized top-coal caving faces. The results showed that the overlying strata experienced stages of roof caving, crack formation, delamination, and crack development, while the water-conducting fracture zones were formed in areas with concentrated energy density. Numerical simulations revealed that the fracture development model was higher in the middle of the goaf, and roof strata deformation was obvious.
APPLIED SCIENCES-BASEL
(2022)
Article
Geochemistry & Geophysics
Wenyu Lv, Kai Guo, Haijin Wang, Kun Feng, Dongdong Jia
Summary: This study investigated the development characteristics of overlying strata fractures in paste composite filling mining (PCFM) through physical simulation, numerical computation, and theoretical analysis. The results indicate that the mining height, filling ratio, and burial depth significantly influence the development of overlying strata fractures.
Article
Energy & Fuels
Jiaxin Zhuang, Zonglong Mu, Xiufeng Zhang, Wu Cai, Anye Cao, Chunlong Jiang, Piotr Malkowski
Summary: Artificially constructing a weakening zone over the roadway is important for preventing coal and rock bursts caused by mining tremors. This study used elasticity principles and UDEC to investigate the seismic absorption and load reduction capabilities of the weakening zone. The results show that the weakening zone's absorbing ability increases exponentially with its weakening coefficient, and its presence reduces sidewall displacement, cracks in the surrounding rock, and overstressed zones. By creating a weakening zone with a coefficient exceeding 0.95, the roadway can withstand dynamic loading of 20 MPa.
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
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
Mining & Mineral Processing
Wang Feifei, Ren Qingyang, Jiang Xueliang, Chen Bin, Jin Honghua, Yang Xianyi
Summary: The research focuses on Chagan Aobao Iron-Zinc Mine and recommends characteristic angles of overlying strata collapse caused by underground mining, providing guidance for rock collapse disaster prevention and control.
JOURNAL OF MINING SCIENCE
(2022)
Article
Acoustics
Yu-Fei Liu, Xin-Hua Wu, Tao Zhu, Xian-Jun Wang, Guo-Yu Zhang, Zhi-Gang Wang
Summary: This study uses the Donggou coal mine as a prototype to investigate the relationship between coal seam buried depth and surface subsidence. Through mechanical testing and theoretical analysis, the appropriate filling material is selected. Results show that surface subsidence decreases with the increase of coal seam buried depth.
SHOCK AND VIBRATION
(2022)
Article
Geosciences, Multidisciplinary
Jun Li, Bin Li, Yang Gao, Fangpeng Cui, Kai He, Jiangshan Li, Haowen Li
Summary: This study investigates the mechanical mechanism of migration failure of overlying strata and the development of water-conducting fractured zone (WCFZ) in the mountainous carbonate areas of southwestern China using theoretical analysis and numerical simulation methods. The study considers the block-shaped rock mass structure of carbonate rocks and deduces a recursive calculation formula for the ultimate subsidence of the three-hinged arch structure of the overlying strata using the theory of damage mechanics. The study also develops a method for determining the height of the WCFZ in the overlying strata under mining conditions. Numerical simulations reveal the stress field, plastic zone, and displacement field of the overlying strata and the dynamic evolution of the WCFZ during the mining process, showing a positive feedback effect between them. The study provides insights for the prevention and mitigation of geological disasters in the mountainous carbonate areas.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Qi Ma, Yidong Zhang, Yu Zheng, Zexin Li, Guangyuan Song, Lei Hu
Summary: This study focuses on the serious coal compression issues under buildings, railways, and water bodies in central and eastern China, as well as the wide range of rock formation damage, high mine pressure, and difficulties in controlling surface subsidence after mining. Through laboratory tests and numerical simulations, the mechanical properties of gangue paste-filling materials, the fracturing process of the coal seam roof, overlying stratum movement, and mine pressure weakening law were studied. The findings provide a scientific basis for green backfill mining, roadway support design, and backfill mining equipment selection.
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
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
Geochemistry & Geophysics
Xiaoshuang Li, Shun Yang, Yunmin Wang, Wen Nie, Zhifang Liu
Summary: The study shows that surrounding rock and overlying strata undergo three stages of deformation during the transition from open-pit to underground mining, with complex internal stress distribution in inclined mined-out areas. The degree of pressure increase and relief is closely related to the size of the mining space, impacting the generation and propagation of cracks. The increase in cracks due to disturbance and deeper excavation accelerates the instability of the surrounding rock and overlying strata in subsequent mining levels.
Article
Materials Science, Ceramics
Tianpeng Liu, Xiaoshuang Li, Kang Zhang, Shuwei Deng, Zhiyu Hu, Hongxiang An, Bo Wang, Youchao Kong
Summary: In this study, manganese-based magnetoplumbite-type La(Zn,Mn)Al11O19 phosphors were successfully synthesized and a narrow green emission band at approximately 518 nm was observed in LaZnAl11O19 host with Mn2+ doping equal to 0.3. Temperature dependent photo-luminescence experiments showed excellent thermal stability in LaZn0.7Mn0.3Al11O19 sample, and the thermal ionization process was elaborated in detail. Finally, a high-power w-LED with high color rendering index and low associated color temperature was produced using a phosphor-in-glass (PiG) technique.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Qinli Zhang, Hao Wu, Yan Feng, Daolin Wang, Huaibin Su, Xiaoshuang Li
Summary: This study explores the effect of solid content (SC), lime-to-sand ratio, and sulfonated naphthalene formaldehyde (SNF) dosage on the rheological and physicomechanical properties of rod milling sand-based cemented paste backfill (RCPB). The results show that the performance of RCPB is influenced by the SNF dosage, lime-to-sand ratio, and SC. The addition of SNF improves the workability and cohesion of RCPB, as well as enhances its early compressive strength.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Energy & Fuels
Qiongqiong Tang, Yuanbo Chen, Rui Jia, Wei Guo, Weiqiang Chen, Xiaoshuang Li, Huicai Gao, Yu Zhou
Summary: Knowledge of the mechanical properties of natural gas hydrate reservoirs is crucial for the safe and commercial extraction of natural gas hydrate. This study investigated the effects of clay type and content on the failure strength and deformation of clayey silt hydrate sediments. It was found that samples containing illite generally exhibited higher strength and stiffness, while samples containing montmorillonite had higher cohesion. These findings provide valuable insights for the assessment of reservoirs and the design of safe wellbores.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Xiaolin Hou, Hongyu Zhai, Chunlai Wang, Tingting Wang, Xiang He, Xiang Sun, Zhian Bai, Baokun Zhou, Xiaoshuang Li
Summary: In this research, a method based on microcrack distribution was proposed to characterize the crack space of rock specimens. Acoustic emission technology was used to obtain the spatial distribution of microcracks in sandstone under uniaxial compression. The geometric features of the crack space were analyzed using the theoretical distribution pattern space (TDPS), 3D convex hull, and the minimum volume enclosing ellipsoid (MVEE) algorithms. The results showed that the 3D convex hull method provided the smallest results in both area and volume of the crack space, while the TDPS method provided the largest results. The deviation between the TDPS method and the MVEE method decreased after 85%. The results suggest that a spatial scale from 65% to 85% is a reliable range for characterizing the crack space.
APPLIED SCIENCES-BASEL
(2023)
Article
Geosciences, Multidisciplinary
Meibao Chen, Xiaofei Jing, Dongxu Xie, Xiaoshuang Li, Yuanzhen Zhang, Xiaohua Liu
Summary: Little attention has been paid to the study of overtopping hydraulic erosion damage characteristics of reinforced tailings dams. Establishing a prediction model for the overtopping of reinforced tailings dams is of great importance.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Xiaofei Jing, Shangwei Wu, Jia Qin, Xiaoshuang Li, Xiaohua Liu, Yuanzhen Zhang, Jingxin Mao, Wen Nie
Summary: By adding incinerator slag to ultrafine tailings, the mechanical properties of the tailings can be effectively enhanced. This study analyzed the macro-and micro-mechanical properties of the tailings slag mixture (TSM) through geotechnical experiments and particle flow simulations. The results showed that the strength parameters of TSM were higher than that of tailings and increased non-linearly with increasing slag content. Microscale simulations revealed that particle transport became more chaotic with higher slag content, and the slag particles significantly impacted the shear processing zone of TSM. These findings provide scientific insights into the shear failure mechanism of TSM.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Chemistry, Physical
Youchao Kong, Donghua Fan, R. Alain Puente Santiago, Xiaoshuang Li, Tianwei He
Summary: In this study, a strategy for doping hetero-metal atoms to promote nitrogen fixation on vanadium nitrides was proposed using density functional theory calculations. The NRR catalytic performance of VN can be boosted by a specific metal atom doping strategy, with VMo@edge and VTi@in-plane/edge identified as the most potential candidates.
APPLIED SURFACE SCIENCE
(2023)
Article
Mathematics, Interdisciplinary Applications
Xiaoshuang Li, Danfeng Pang, Philip Wallhead, Richard Garth James Bellerby
Summary: This study investigates the impacts of ocean acidification and Allee effects on the dynamics of a marine predator-prey system. The study considers a diffusive predator-prey model with a double Allee effect on prey and a pH-dependent capture rate. The results show that changing environmental conditions can fundamentally alter the system dynamics, leading to decreased abundance and diversity of marine species by weakening predation rates. Additionally, the stability of periodic solutions is determined by double Allee effect parameters, with longer wavelengths observed as the Allee effect increases.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Geochemistry & Geophysics
Ruoyan Kong, Dan-Ping Yan, Liang Qiu, Xiaoyu Dong, Wenjing Yang, Huilong Liu, Xiaoshuang Li
Summary: The processes of subduction and collision between the South China Block and the North China Block have been extensively studied. However, the understanding of the collision process along the eastern North China Block is limited. The Liaodong Peninsula, located northeast of the Sulu Orogenic Belt, provides important insights into the foreland thrust belt. Geological investigations and stress reconstructions suggest the existence of a top-to-the-NE propagated fold-thrust belt representing the D1 deformation. U-Pb ages of zircons from dyke samples further constrain the timing of the D1 deformation to 249-224 Ma. This study reveals the effects of the collision and subduction events on the tectonic evolution of the region.
Article
Green & Sustainable Science & Technology
Xiaohua Ding, Zhongchen Ao, Xiaoshuang Li, Shuangshuang Xiao, Mao Wu, Bokang Xing, Ruhao Ge, Donghua Zhang
Summary: This paper explains the deformation damage and motion law caused by the detonation of blocked material in the gun hole by simulating the motion of the blocked material in the gun hole. It introduces geological polymer to improve the harmful effects of blasting and conducts a field test to demonstrate that the modified blocking material can enhance blockage ability, reduce large block rate, dust and flying stone, and improve production efficiency and safety.
Article
Thermodynamics
Chenyu Wang, Jiabo Geng, Dongming Zhang, Shujian Li, Xiaolei Wang, Qinglin Li
Summary: This study investigated the effect of drilling direction and hydraulic pressure on shale failure properties in hydraulic fracturing. The results showed that increasing hydraulic pressure led to a decrease in shale's tensile strength, absorbed energy, and crack deviation distance. High hydraulic pressure weakened shale's mechanical strength and facilitated the formation of hydraulic cracks. Additionally, the stability of shale's acoustic emission energy was analyzed, indicating the suitability of specific hydraulic fracturing technical conditions.
Article
Thermodynamics
Jiabo Geng, Gaoxiong Zeng, Cunyang Liu, Xiaoshuang Li, Dongming Zhang
Summary: The research of gas-water two-phase flow is crucial for gas extraction and CBM in deep coal rock, and a triaxial seepage test system for gas-water two-phase in coal rock has been developed independently. The system has various stress loading modes and can study the seepage behavior of the gas phase, water phase, and gas-water two-phase in coal rock under cyclic loading and unloading. The results showed that two-phase seepage test required gas-driven water injection and the water phase exhibited significant seepage earlier than single-phase seepage. Additionally, the damage to specimens, including the number and area of cracks, was more prominent in two-phase seepage, and the gas permeability in coal rock showed a trend of increasing and then decreasing due to the water phase, with a value lower than 0.0025 mD under incomplete pressure relief.
Correction
Biochemical Research Methods
Peiran Jiang, Ying Chi, Xiao-Shuang Li, Zhenyu Meng, Xiang Liu, Xian-Sheng Hua, Kelin Xia
BRIEFINGS IN BIOINFORMATICS
(2023)
Article
Geosciences, Multidisciplinary
Xiaoshuang Li, Qihang Li, Guoqing Hou, Feng Zhang, Jun Lu
Summary: This study investigates the dump slope instability induced by rainfall in Kunyang phosphate mine, using field investigation, rainfall simulation experiments, and numerical analysis. The results show that the stability of dumps varies in different mining areas, with some areas at risk of landslide disaster.
GEOLOGICAL JOURNAL
(2023)
