Results 11 to 20 of about 338,284 (271)

Overburden failure characteristics and fracture evolution rule under repeated mining with multiple key strata control. [PDF]

Sci Rep
Chaoshang S, Chaoyang S, Zhiming Z, Haixiao L, Zhenhua L, Feng D, Zhengzheng C, Pengtao L, Lin L.   +8 more
europepmc   +4 more sources

Study on the Co-Evolution Mechanism of Key Strata and Mining Fissure in Shallow Coal Seam Mining

Applied Sciences, 2023
Shallow coal seam mining makes the evolution form of mining fissures in rock and soil layers diversified, which leads to the easy penetration of mining fissures as the main channel of water, sand inrush, and air leakage.
Jie Zhang, Yifeng He, Tao Yang, Wenyong Bai, Shoushi Gao, Yihui Yan   +5 more
doaj   +3 more sources

Simulation research on the influence of eroded primary key strata on dynamic strata pressure of shallow coal seams in gully terrain

International Journal of Mining Science and Technology, 2012
Abstract In Huojitu Coal Mine of Shendong mining area, the dynamic strata pressure (DSP) accidents occurred when the working faces passed the gully terrain. Focusing on this problem, we used physical simulation experimental method to thoroughly study the influence of eroded overlying primary key strata (PKS) in the gully terrain on DSP of shallow ...
Zhiqiang Zhang, Jialin Xu, Weibing Zhu, Zhenjun Shan   +3 more
openaire   +3 more sources

Coal burst mechanism in large-scale panel under extra-thick key strata

Geomatics, Natural Hazards and Risk
Extra-thick key strata (ETKS) are a key factor causing coal bursts. In this study, field monitoring, physical and numerical modelling, and theoretical analysis were comprehensively adopted to investigate the effect of ETKS on the static and dynamic stress and its impact on coal bursts.
Kunyou Zhou, Linming Dou, Jiliang Kan, Ke Yang, Jiazhuo Li, Xiaotao Ma   +5 more
openaire   +4 more sources

Mechanism of rock burst caused by fracture of key strata during irregular working face mining and its prevention methods

International Journal of Mining Science and Technology, 2019
To study the occurrence mechanism of rock burst during mining the irregular working face, the study took irregular panel 7447 near fault tectonic as an engineering background.
Zengqiang Yang, Chang Liu, Hengzhong Zhu, Fuxing Xie, Linming Dou, Jianhang Chen   +5 more
doaj   +3 more sources

Influence of backfilling rate on the stability of the “backfilling body-immediate roof” cooperative bearing structure

International Journal of Mining Science and Technology, 2022
To reduce the cost of backfilling coal mining and utilize the underground space of coal mines, a new backfilling mining method with low backfilling rate called constructional backfilling coal mining (CBCM) is proposed.
Xianjie Du, Guorui Feng, Min Zhang, Zehua Wang, Wenhao Liu   +4 more
doaj   +1 more source

Effects of forest fragmentation on the vertical stratification of neotropical bats [PDF]

, 2020
Vertical stratification is a key component of the biological complexity of rainforests. Understanding community- and species-level responses to disturbance across forest strata is paramount for evidence-based conservation and management.
Farneda, F, López-Baucells, A, Meyer, CFJ, Rocha, R, Silva, I   +4 more
core   +4 more sources

Motion model and key parameters of overburden strata in longwall filling face

E3S Web of Conferences, 2021
When the paste material is filled into the longwall working face of the coal mine, it firstly controls the movement of the overburden strata, thereby limiting the movement of the far field rock layer and reducing the subsidence. With this regard, the paste filling technology of the long-wall mining can address the limitation of “three down, one up ...
Yin Zengde, Liu Jinxiao, Zhang Feng, Liu Yongle, Li Wenxin   +4 more
openaire   +2 more sources

Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory [PDF]

Advances in Civil Engineering, 2019
Overburden key strata (KS) have a significant influence on abutment pressure distribution. However, current calculation methods for working surface abutment pressure do not consider the influence of the overburden KS. This study uses KS theory to analyze the overburden load transferred to coal‐rock masses on both sides of the stope through fractured ...
Hongkai Han, Jialin Xu, Xiaozhen Wang, Jianlin Xie, Yantuan Xing   +4 more
openaire   +2 more sources

Application of an Optimized PSO-BP Neural Network to the Assessment and Prediction of Underground Coal Mine Safety Risk Factors

Applied Sciences, 2023
Coal has played an important role in the economies of many countries worldwide, which has resulted in increased surface and underground mining in countries with large coal reserves, such as China and the United States.
Dorcas Muadi Mulumba, Jiankang Liu, Jian Hao, Yining Zheng, Heqing Liu   +4 more
doaj   +1 more source