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Semi-enclosed experimental system for coal spontaneous combustion for determining regional distribution of high-temperature zone of coal fire
Springer Science and Business Media LLC - - 2022
Jingyu Zhao, Hanqi Ming, Tao Guo, Yuxuan Zhang, Jun Deng, Jiaqi Song, Qiufeng Zeng, Chi‐Min Shu
AbstractTemperature variation and gas generation at different depths and positions in the coal combustion process were studied to determine the propagation and evolution of high temperature regions in the process of coal spontaneous combustion. This study selected coal samples from Mengcun, Shaanxi Province, People’s Republic of China, and developed a semi-enclosed...... hiện toàn bộ
Division of carbon sink functional areas and path to carbon neutrality in coal mines
Springer Science and Business Media LLC - - 2022
Boyu Yang, Zhongke Bai, Shuai Fu, Yingui Cao
AbstractRemote sensing image data of typical mining areas in the Loess Plateau from 1986 to 2018 were used to analyze the evolution of land use, explore the division of carbon sink functional areas, and propose carbon neutrality paths to provide a reference for the coal industry carbon peak, carbon-neutral action plan. Results show that (1) land use has changed sig...... hiện toàn bộ
Research progress of monitoring, forecasting, and prevention of rockburst in underground coal mining in China
Springer Science and Business Media LLC - Tập 1 - Trang 278-288 - 2014
Lin-ming Dou, Zong-long Mu, Zhen-lei Li, An-ye Cao, Si-yuan Gong
As one of the dynamic disasters of coal mines, rockburst seriously affects underground safe coal mining. Based on the laboratory test, field test, and theoretical analysis, this study proposed the principle of the rock burst induced by the combination of dynamic and static stresses and divided such rock burst into three types, including induced by primary dynamic stress, mainly induced by dynamic ...... hiện toàn bộ
Reasonable location of stopping line in close-distance underlying coal seam and partition support of large cross-section roadway
Springer Science and Business Media LLC - Tập 9 - Trang 1-22 - 2022
Dongdong Chen, Yiyi Wu, Shengrong Xie, Fangfang Guo, Fulian He, Ruipeng Liu
Close-distance coal seams are widely distributed over China, and the coal pillars left by the overlying coal seams affect the retracement channel of the underlying coal seam in the stopping stage. Based on the engineering background of close-distance seam mining in a coal mine, the reasonable position of the underlying coal seam's stopping line and the support method of the large section roadway d...... hiện toàn bộ
Three dimensional discrete element modelling of the conventional compression behavior of gas hydrate bearing coal
Springer Science and Business Media LLC - Tập 11 - Trang 1-17 - 2024
Xia Gao, Nannan Wang, Baoyong Zhang, Qiqi Lin, Qiang Wu, Wei Meng, Xia Liu
To analyze the relationship between macro and meso parameters of the gas hydrate bearing coal (GHBC) and to calibrate the meso-parameters, the numerical tests were conducted to simulate the laboratory triaxial compression tests by PFC3D, with the parallel bond model employed as the particle contact constitutive model. First, twenty simulation tests were conducted to quantify the relationship betwe...... hiện toàn bộ
Composition and mode of occurrence of minerals in Late Permian coals from Zhenxiong County, northeastern Yunnan, China
Springer Science and Business Media LLC - Tập 1 Số 1 - Trang 13-22 - 2014
Li Tian, Shifeng Dai, Jianhua Zou, Sen Zhang, He-Hing Tian, Lixin Zhao
AbstractMinerals in the Late Permian coals from the Niuchang-Yigu mining area, Zhenxiong County, northeastern Yunnan, China, were investigated using optical microscopy and low temperature ashing plus X-ray diffraction (LTA + XRD). The results showed that minerals in the coal LTAs are mainly quartz, kaolinite, chamosite, mixed-layer illite/smectite (I/S), pyrite, an...... hiện toàn bộ
Grinding analysis of Indian coal using response surface methodology
Springer Science and Business Media LLC - Tập 3 - Trang 184-190 - 2016
Twinkle Singh, Aishwarya Awasthi, Pranjal Tripathi, Shina Gautam, Alok Gautam
The present work discusses a systematic approach to model grinding parameters of coal in a ball mill. A three level Box–Behnken design combined with response surface methodology using second order model was applied to the experiments done according to the model requirement. Three parameters ball charge (numbers 10–20), coal content (100–200 g) and the grinding time (4–8 min) were chosen for the ex...... hiện toàn bộ
Theoretical analysis and engineering application of controllable shock wave technology for enhancing coalbed methane in soft and low-permeability coal seams
Springer Science and Business Media LLC - - 2024
Guodong Qiao, Zegong Liu, Yongmin Zhang, Changping Yi, Kui Gao, Shigui Fu, Youzhi Zhao
Coalbed methane (CBM) is a significant factor in triggering coal and gas outburst disaster, while also serving as a clean fuel. With the increasing depth of mining operations, coal seams that exhibit high levels of gas content and low permeability have become increasingly prevalent. While controllable shockwave (CSW) technology has proven effective in enhancing CBM in laboratory settings, there is...... hiện toàn bộ
Sustainable reclamation practices for a large surface coal mine in shortgrass prairie, semiarid environment (Wyoming, USA): case study
Springer Science and Business Media LLC - Tập 9 - Trang 1-14 - 2022
Anna Krzyszowska Waitkus
Sustainable reclamation practices for large surface coal mines in USA semiarid environment contribute to the quality of the environmental on a long term basis where environmental resources are protected for future generation. Land, after reclamation, must be suitable for the previous use of greatest economic or social values to the community area. In the semiarid climate of USA, non-developed land...... hiện toàn bộ
Gasification of lignite from Polish coal mine to hydrogen-rich gas
Springer Science and Business Media LLC - Tập 9 - Trang 1-10 - 2022
Adam Smolinski, Sławomir Wochna, Natalia Howaniec
The efforts of the world research activities involved in clean coal technologies development focus to a considerable extent on integrated hydrogen and power generation technologies based on coal gasification. As an alternative to combustion processes, gasification offers increased efficiency, lower negative environmental impact as well as wider application range of the main product—synthesis gas—i...... hiện toàn bộ
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