Ecological restoration in valley area of semiarid region damaged by shallow buried coal seam mining by Chen Puhao, Wang Jianbin, Wang Haiyan

“…The results showed that ERQI values in the study area experienced an evolution process from high to low and then gradually increased, reflecting the impact of coal mine production and restoration activities on the environment, in which Burn Area Index and normalized difference vegetation index were more sensitive; after nearly 10 years of restoration, ERQI values in the study area still had a large gap with that of the reference area, some suggestions for improvement of ecological restoration were put forward. …”
Get full text

Interrelationships between Acoustic Emission and Cutting Force in Rock Cutting by Sifei Liu, Peng Shi, Zhijun Wan, Shuaifeng Lu, Jiakun Lv, Fanfei Meng

“…The above conclusions are of great significance for intelligent control of shearer and intelligent mining of coal mine.…”
Get full text

Research on a Numerical Simulation and Prediction Model of Floor Mining Failure Depth in the Chenghe Mining Area by Ang Li, Qian Mu, Wenzhong Zhang, Chaoyang Liu, Feng Wang, Lin Mou

“…Ordovician limestone water on the floor is a serious threat to the safety of coal mine production in the Weibei coalfield, and prediction of the floor failure depth is the key for evaluating the mining conditions under pressure. …”
Get full text

A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway by Weidong Pan, Xinyuan Li, YiWei Li, Xiaobin Li, Qing Qiao, Haoran Gong

“…By using a FDEM method, a real case in Xutuan coal mine is studied. Compared with the process without backfill, the z-displacement of cross-cut roof decreased shapely after backfilling, with a maximum z-displacement, decreases from 0.76 m to 0.13 m and from 0.39 m to 0.064 m in PTR and SAR section, respectively. …”
Get full text

Experimental Study of Prevention and Control of Rock Burst in Steeply Inclined Coal Seams by Mining Sequence and Filling by Zhihui Zhang, Yangyi Liu, Wenwen Zhu, Jian Liu, Tian Ma, Chunxue Xie

“…In order to figure out the effects of filling and mining sequence on rock burst in the steeply inclined coal seam, B3+6 and B1+2 coal seams in Wudong coal mine are chosen as the research objects, and an in-house experiment system of similarity simulation is established in this study. …”
Get full text

Numerical Simulation Study on the Distribution Law of Deviatoric Stress of Floor under the Influence of Mining by Hongtao Liu, Tianhong Huo, Yongen Li, Ming Luo, Guangdong Zhou, Zengji He

“…The Zhaogu No. 2 coal mine is a single thick coal seam mining mine with high gas content. …”
Get full text

Porous Blasting Morphology and Resistivity Response Characteristics of Soft Coal Seam by Wenwang Yang, Sanlin He, Taotao Zhao, Chenying Ge

“…The fractal dimension of cracks reaches 21.28%, the negative effect of the blast holes cavity is offset (S > 0), and the resistivity in the controlled area generally increases by 1 to 30 times. (3) Compared with the single-hole blasting model, the multi-hole blasting is more in line with the coal mine site, and can effectively increase the permeability in the control area, and the resistivity generally increases.…”
Get full text

A Novel Coal Burst Criterion of Anchored Roadway Surrounding Rock under Dynamic Disturbance by Zheng-yi Wang, Peng-bo Li

“…Mining roadway is the main occurrence area of coal bursts in underground coal mining. A good understanding of the failure process of elastic zone and energy evolution inducing instability of support structure can offer useful insight into the coal burst mechanism. …”
Get full text

Mechanical Properties and Failure Behavior of Composite Samples by Hongwei Zhang, Zhijun Wan, Yuan Zhang, Dong Wu

“…In underground coal mining systems, the occurrences of coal burst hazards and pillar failures relate not only to the condition of stress distribution but also the geometry of roof-coal-floor structures. …”
Get full text

Research of the Backfill Body Compaction Ratio Based on Upward Backfill Safety Mining of the Close-Distance Coal Seam Group by Xingping Lai, Leiming Zhang, Yun Zhang, Pengfei Shan, Peifeng Wan, Kaiwen Mu

“…The lower coal seam engineering safety BBCR of upward backfill mining in the Dafosi Coal Mine was 87.2%, and the close-distance coal seam group safe upward mining was realized.…”
Get full text

Study of the Roof Deformation Characteristics of Roadway Excavation Face and Unsupported Roof Distance by Jie Zhang, Shoushi Gao, Yifeng He, Tao Yang, Bing Wang, Li Wang, Haibo Pang, Bing Peng

“…To provide a practical example, we calculate the maximum unsupported roof distance of 30304 tailgate in the Yanghuopan Coal Mine to be 3.4 m. Numerical simulation and field monitoring results confirm that the deformation of the roof in the excavation face is minimal, and the stability of the rock is good.…”
Get full text

Experimental Study on Crack Extension Rules of Hydraulic Fracturing Based on Simulated Coal Seam Roof and Floor by Lu Gao, Xiangtao Kang, Gun Huang, Ziyi Wang, Meng Tang, Xiaoying Shen

“…Therefore, the hydraulic fracturing test of the simulated combination of the coal seam and the roof and floor under different stress conditions was carried out using the self-developed true triaxial coal mine dynamic disaster large-scale simulation test rig. …”
Get full text

Contamination Features and Source Apportionment of Heavy Metals in the River Sediments around a Lead-Zinc Mine: A Case Study in Danzhai, Guizhou, China by Rongguo Sun, Yue Gao, Jing Xu, Yang Yang, Yutao Zhang

“…It was found that lead-zinc mining and smelting activities, coal mining activities, and agricultural activities (livestock and poultry breeding) are the primary sources of selected HMs, based on the results of correlation analysis together with principal component analysis (PCA) and positive matrix factorization (PMF) model. …”
Get full text

Effect of Fragmentation on Pore Structures and Fractal Characteristics of Intact Coal and Deformed Coal Based on Experiments by Mingjie Li, Shouqing Lu, Chengfeng Wang, Jie Liu, Jiang Shi, Taibiao Bei

“…Coal mining has to develop to deeper strata with the increasing demand for coal, which leads to frequent coal and gas outburst disasters. …”
Get full text

Mechanism of Roadway Floor Heave Controlled by Floor Corner Pile in Deep Roadway under High Horizontal Stress by Xinchao Kang, Dongming Guo, Zhiying Lu

“…In order to overcome the support difficulty of serious floor heave caused by rock burst, with the floor heave of ventilation roadway in Hegang Xing An Coal Mine as the engineering background, the treatment scheme of the concrete-filled steel tube corner pile and floor grouting is put forward. …”
Get full text

Stability Analysis and Monitoring Method for the Key Block Structure of the Basic Roof of Noncoal Pillar Mining with Automatically Formed Gob-Side Entry by Jianning Liu, Manchao He, Yajun Wang, Ruifeng Huang, Jun Yang, Xichun Tian, Can Ming, Shan Guo

“…This paper is set in the engineering context of the GEFANM experiment at the Ningtiaota Coal Mine. The study fully considered the differences in the gob roof caving on the roof-cutting-line side, and the range of rotation angles to maintain a stable key block was determined. …”
Get full text

Removal of Cd(II) and Cu(II) from Aqueous Solution by Na+-Modified Pisha Sandstone by Xia Wang, Yongxing Cui, Qi Peng, Chenbin Fan, Zhiqin Zhang, Xingchang Zhang

“…Heavy metals have caused serious environmental issues, which are enriched during open-cast coal mining. It is urgent to develop sustainable remediation materials to protect and restore the contaminated soil and aquifers in mining areas. …”
Get full text

Intelligent control algorithms for posture and height control of four-leg hydraulic supports by Yihui Pang, Yaoyu Shi

“…Abstract To address limitations of traditional inclinometers and height sensors in determining the posture and support height of hydraulic supports in coal mining, we propose a novel method predicated on travel measurements of the leg and tail beam cylinders. …”
Get full text

“Relief-Retaining” Control Technology of Floor Heave in Mining Roadway with Soft Rock: A Case Study by Ai Chen, Xuebin Li, Xuesheng Liu, Yunliang Tan, Ke Xu, Honglei Wang

“…The return airway of no. 130203 working face in Zaoquan Coal Mine of Ningdong Mining Area in Northwest China is the research object in this study. …”
Get full text

The Study on Large-Diameter Drilling Prevention Method of Rock Burst in the Xinxing Coal by Gao Xu, Zuo Minghui, Shu Yanmin

“…Based on the engineering background, the 41051 working face of the 65th coal mine in Qitaihe Xinxing Mine was regarded as the engineering background, by using of the comprehensive research methods such as theoretical analysis and calculation, FLAC3D numerical simulation, physical parameters of coal and rock in laboratory, and the field industrial measurement, to research on the large drilling relieving rock burst mechanism and parameter setting in reasonable. …”
Get full text