Results 51 to 60 of about 1,845,683 (177)
Geofluids, 2023 Rockburst caused by the fracture of thick hard roof and the instantaneous instability of residual coal pillar seriously jeopardize the deep coal mining safety.
Wenjie Liu +4 more
doaj +1 more source
, 2023 Considering the factors affecting the surrounding rock stability of gob-side entry retaining, the applicability of a large-diameter, concrete-filled steel tube roadside support body in a top-coal caving fully mechanized face is discussed, and a new ...
Oleg Ivanovich Kazanin +5 more
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Meikuang Anquan, 2022 In order to improve the recovery rate of coal resources in general, Chengzhuang Coal Mine has carried out and implemented the technology of gob-side entry retaining in 5309 large height mining face.
SI Xiaopeng, ZHOU Changtai
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Study on Movement Laws of Rockmass Structure and its Control in Gob-Side Roadway Retaining
IOP Conference Series: Earth and Environmental Science, 2018 According to the structural mechanics model of gob-side roadway retaining overlying strata, the paper analyzed the deformation characteristics of surrounding rock and the stress characteristics of filling body in the two stages and obtained the basic requirements for roadside filling body to keep the stability of gob-side roadway retaining as follows ...
Changhong Li, Pengfei Wang, Yangfan Wu
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Gong-kuang zidonghuaTo address the complexity and time-consuming nature of current optimization studies on coal pillar width for gob-side roadway driving, the Polar Lights Optimizer (PLO) algorithm is introduced to automatically optimize the coal pillar width.
ZHAO Baofu
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Advances in Civil Engineering, 2020 Maintaining surrounding rock mass stability of roadways is essential to the safety of deep coal mining. In this study, the No. 2‐2092 roadway of the No. 2‐209 mining face in Ganhe coal was taken as the target roadway for field analysis. The selected region can be considered a typical area with dominating geological tectonic stress, based on the ...
Jianwei Zheng +5 more
openaire +2 more sources
The Floor Heave Mechanism and Control Technology of Gob-Side Entry Retaining of Soft Rock Floor
, 2023 Extensive soft-rock floor heave in gob-side entry retaining considerably restricts the efficient and sustainable production of the mine. The mechanical capacities of roadway roof and floor strata are discussed through laboratory tests by taking the N2301
Lei Hu +7 more
core +1 more source
Study on Roof‐Control Technology for Gob‐Side Entry Retaining Under Composite Roofs
Energy Science &Engineering, EarlyView.This study develops a roof‐control technology system for gob‐side entry retaining under composite roofs. By integrating field measurements, theoretical analysis, and numerical simulation, it reveals the spatiotemporal evolution of the plastic zone and proposes a targeted support method, providing theoretical and practical guidance for safe and ...
Dong Li +4 more
wiley +1 more source
Advances in Materials Science and Engineering, 2019 Automatic roadways on gob-side entry retaining with no-pillars are used for longwall mining technology. The mining technology with no-pillars can recover coal pillar resources and reduce the amount and cost of roadway excavations.
Shengrong Xie +9 more
doaj +1 more source
Energy Science &Engineering, EarlyView.This study addresses hard roof coal seam conditions by optimizing key stratum blasting‐cutting parameters through theoretical analysis, numerical simulation, and field tests. It proposes calculation methods for blast hole spacing and delay timing based on stress wave theory, controlling roadway deformation within 35 mm, thereby enhancing resource ...
Qiong Liu, Duanxiang Fu, Hongbin Li
wiley +1 more source