Article
Geosciences, Multidisciplinary
Liang Cheng, Jiang Xu, Shoujian Peng, Lei Qin, Fazhi Yan, Yang Bai, Bin Zhou
Summary: Coal-and-gas outburst (CGO) is a major challenge in coal mining, and the initial gas pressure has a significant influence on the flow characteristics of CGO airflow. The study found that the gas pressure decreases periodically or continuously during the CGO process, and the static pressure in the roadway shows alternating positive-negative pressure transition. The increase in coal seam initial gas pressure leads to higher velocity and longer duration of high-speed airflow in the roadway.
NATURAL RESOURCES RESEARCH
(2022)
Article
Energy & Fuels
Shengjie Fang, Bing Liang, Weiji Sun, Maolong Qin, Zhanshan Shi, Jianfeng Hao
Summary: This study aims to explain the stress evolution law of the upper coal group in the long-distance mining of the lower coal group in Pingdingshan No. 8 Coal Mine. A simulation model was established to study the stress evolution law of the upper coal seam under the influence of advanced mining disturbance of the lower coal seam. The results showed that the advance mining of the lower coal group had both positive and negative impacts on the stress distribution of the upper coal seam group, and the pressure relief effect was remarkable.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Engineering, Civil
Neil R. Viney, David A. Post, Russell S. Crosbie, Luk J. M. Peeters
Summary: This manuscript outlines a methodological framework for modeling the hydrological impacts of future coal mining and coal seam gas extraction, providing crucial objective information to regulators. The structured uncertainty analysis approach can be applied under a wide range of data availability, and additional data can easily be incorporated to better constrain the results. The methodology has the potential to be adapted and applied to a range of extractive industries, although it currently does not explicitly consider impacts on water quality.
JOURNAL OF HYDROLOGY
(2021)
Article
Mining & Mineral Processing
Qingyi Tu, Yuanping Cheng, Sheng Xue, Ting Ren, Xiang Cheng
Summary: The research investigated the crushing work ratios and gas desorption properties of intact coal, concluding that high levels of transport work and gas are needed for crushing intact coal, exceeding the transport work significantly. The study also found that the required minimum stress for crushing intact coal exceeds the in-situ stresses available at mining depths of 300-700 meters.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Wei Yang, Wenxiao Zhang, Baiquan Lin, Guangyao Si, Jianguo Zhang, Jianli Wang
Summary: The paper demonstrated a novel integrated mining system in the 12th coal mine of the Pingdingshan coalfield, which extracted two panels simultaneously to effectively mine thin protective coal seams and control gas outbursts. This system not only increased mining efficiency, but also reduced surface mining footprint and cost of gangue handling.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Energy & Fuels
Haidong Wang, Zhiheng Cheng, Quanle Zou, Zhenhua Li, Fulong Sun, Hongwei Yang, Yun Lei
Summary: The proper understanding and utilization of liquid CO2 phase transition fracturing technology is crucial for reducing CO2 emissions and increasing coalbed methane production. By implementing this technology in outburst-prone coal seams, it is possible to improve gas extraction speed, increase gas permeability, and effectively suppress coal seam outbursts.
Article
Energy & Fuels
Zhengshuai Liu, Longyong Shu, Zhonggang Huo, Yongpeng Fan
Summary: Most coal and gas outbursts occur in the coal thickness variation zone, but it is difficult to explain the mechanism of outbursts in coal thickening areas through physical simulation experiments. By establishing a coupled multi-field model, this study investigated the evolution of stress, gas pressure, and plastic failure zones in coal seams with different variation gradients and amplitudes of coal thickness. The research provides theoretical support for preventing and controlling outbursts in coal seam thickening areas during mining.
Article
Engineering, Civil
Neil R. Viney, David A. Post, Yongqiang Zhang, Fazlul Karim, Santosh K. Aryal, Mat Gilfedder, Jorge Pena Arancibia, Bill Wang, Ang Yang, Ramneek Singh, Xiaogang Shi, Russell S. Crosbie, Luk J. M. Peeters, Natasha F. Herron, Jai Vaze, Steve Marvanek, Debbie Crawford, Adam Ramage, Adrian Dehelean, Dennis Gonzalez, Lingtao Li, Tim Evans
Summary: The manuscript presents modeling examples on the impacts of coal mining and coal seam gas extraction on streamflow in Australian catchments. It proposes a zone of potential hydrological change within a catchment, delineating vulnerable landscape areas. Results indicate that reductions in annual streamflow are proportional to coal mine coverage and well density in coal seam gas fields.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Zhiheng Cheng, Hui Pan, Quanle Zou, Zhenhua Li, Liang Chen, Jialin Cao, Kun Zhang, Yongguo Cui
Summary: With the increasing demand for coal resources, coal has been mined in deep coal seams, leading to great risks of coal and gas outburst. Protective coal seam mining, as a safe and effective method for gas control, has been widely used. This study investigated stress-seepage coupling laws and permeability characteristics of a protected coal seam during the process of protective coal seam mining.
NATURAL RESOURCES RESEARCH
(2021)
Article
Engineering, Geological
Yue Niu, Enyuan Wang, Zhonghui Li, Feng Gao, Zhizhen Zhang, Baolin Li, Xin Zhang
Summary: This study utilizes electric potential (EP) signals generated under the coupling action of stress and gas to real-time monitor and finely identify coal and rock dynamic disaster hazard zones. The study provides a valuable new method for accurately identifying outburst hazards and preventing coal and rock dynamic disasters in deep coal mines.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Environmental
Wencheng Song, Zhengzhao Liang
Summary: Mining activities above an aquifer, especially in the hanging wall of normal faults, carry the risk of water inrush. Research shows that fault activation is positively correlated with the advancing distance and negatively correlated with the fault dip angle, suggesting that a smaller fault dip angle may lead to an earlier formation of water-inrush channels.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Feng Zhang, Jinshan Zhang
Summary: This paper presents a study on the mining sequence and gas control technology in Wulan Coal Mine, proposing the method of combined protective layer mining of #7 and #8 coal seams and using surface drilling for pressure-relief gas extraction to protect the #2 and #3 coal seams.
Review
Energy & Fuels
Chao Xu, Tong Yang, Kai Wang, Qiang Fu, Shihao Ma
Summary: Coalbed methane is a low-carbon and clean energy source, but also a dangerous gas that threatens mine safety. Understanding the development of fractures and gas migration in the coal seam's overlying strata is essential for accurate extraction. Various methods, such as roadway, borehole drilling, and surface drilling, are used for gas extraction in the fractured zone.
Article
Geochemistry & Geophysics
Yaobin Li, Tao Jiang, Xin Guo
Summary: Directional long drilling is used to replace conventional drilling for coal seam gas extraction, improving extraction rate, reducing outburst time, and increasing gas drainage rate.
Article
Green & Sustainable Science & Technology
Xiong Ding, Cheng Zhai, Jizhao Xu, Xu Yu, Yong Sun
Summary: This study analyzes the permeability variation of coal in front of the coal mining working face (CMWF) during the mining of coal seams with outburst hazard. The results reveal that a secondary enhanced extraction technology can realize regional unloading and provide channels for gas extraction.
Article
Energy & Fuels
Qingyi Tu, Yuanping Cheng
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2019)
Article
Energy & Fuels
Jingyu Jiang, Weihua Yang, Yuanping Cheng, Zhengdong Liu, Qiang Zhang, Ke Zhao
Article
Energy & Fuels
Rong Zhang, Yuanping Cheng, Liang Yuan
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2020)
Article
Engineering, Chemical
Zhenyang Wang, Yuanping Cheng, Yuxiao Qi, Ranpeng Wang, Liang Wang, Jingyu Jiang
Article
Engineering, Geological
Qingyi Tu, Yuanping Cheng, Ting Ren, Zhenyang Wang, Jia Lin, Yang Lei
ROCK MECHANICS AND ROCK ENGINEERING
(2019)
Article
Energy & Fuels
Zheng Shang, Haifeng Wang, Yuanping Cheng, Bing Li, Jun Dong, Qingquan Liu
Summary: This study examined the effective range, efficiency, cost, and applicable conditions of surface well drilling and net-like penetrating boreholes for pressure-relief gas extraction. The results showed that surface wells have higher gas extraction concentration and purity compared to NPB.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Energy & Fuels
Hao Zhang, Yuanping Cheng, Liang Yuan, Liang Wang, Jingyu Jiang, Guofang Li
Summary: A gas extraction model considering the effects of coal damage on permeability evolution was developed and applied to design a hydraulic cavity scheme for the Shijiazhuang coalmine, with field application results proving the accuracy of the simulation.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Energy & Fuels
Xiangjun Chen, Liyang Li, Yuanping Cheng, Lingling Qi
Summary: This study investigates the influence of water injections on coalbed methane recovery. The results show that the injected water can replace the adsorbed methane, and the replacement ratio and quantity of methane increase with the increasing quantities of injected water. This suggests that water injections can further enhance CBM recovery.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Energy & Fuels
Congmeng Hao, Yuanping Cheng, Hongyong Liu, Liang Wang, Qingquan Liu
Summary: The new technology, assisted by mechanical cutting with waterjet, effectively increases gas drainage efficiency in coal seams and reduces mining costs.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Energy & Fuels
Hao Zhang, Yuanping Cheng, Liang Yuan, Liang Wang, Zhejun Pan
ENERGY SCIENCE & ENGINEERING
(2019)
Article
Geosciences, Multidisciplinary
Kaizhong Zhang, Liang Wang, Yuanping Cheng, Wei Li, Jin Kan, Qingyi Tu, Jingyu Jiang
NATURAL RESOURCES RESEARCH
(2020)
Review
Energy & Fuels
Wei Zhao, Yuanping Cheng, Zhejun Pan, Kai Wang, Shimin Liu
Article
Engineering, Chemical
Jingyu Jiang, Weihua Yang, Yuanping Cheng, Ke Zhao, Shaojie Zheng
Article
Thermodynamics
Jia Lin, Ting Ren, Yuanping Cheng, Jan Nemcik, Gongda Wang
Article
Chemistry, Multidisciplinary
Jun Dong, Yuanping Cheng, Pinkun Guo