Results 31 to 40 of about 3,184,777 (174)

Mechanism and control of asymmetric floor heave in thick-seam gob-side roadways with staggered-elevation negative coal pillar layout [PDF]

Scientific Reports
Asymmetric floor heave in gob-side entries of thick coal seams is controlled by rib-to-rib vertical-stress imbalance acting together with in-situ horizontal stress.
Binyu Liu, Peng Wang, Zhiqiang Wang, Lu Lin, Xiaoqiang Zhou, Andrian S. Batugin   +5 more
doaj   +2 more sources

Mechanism and prevention measures of asymmetric floor heave in mining roadway of Huipodi Coal Mine

矿业科学学报, 2020
Taking Huipodi coal mine as the engineering background, the asymmetric deformation mechanism of the mining roadway under the island coal pillar was studied by theoretical analysis, numerical simulation and field measurement, and the corresponding floor ...
Zhao Hongbao, Liu Yihong, Cheng Hui, Li Jinyu, Xu Jianfeng, Wang Yikuo   +5 more
doaj   +2 more sources

Analysis and treatment of invert uplift in a long span tunnel in weak mudstone [PDF]

Scientific Reports
To address the invert heave issue in large-span tunnels traversing fully weathered, water-rich cretaceous mudstone in western China’s complex geological zones, the asymmetric invert heave mechanism was investigated and corresponding treatment measures ...
Junwu Chen, Zuowei Hao, Zhiyun Deng, Baoguo Liu, Xiaomeng Shi   +4 more
doaj   +2 more sources

Floor heave in the west wing track haulage roadway of the Tingnan Coal Mine: Mechanism and control

International Journal of Mining Science and Technology, 2012
Abstract Floor heave of a roadway is a dynamic phenomenon that often happens in the roadways of coal mines. It seriously affects safe production in the coal mine. Floor heave has long been one of the most difficult problems to be resolved during coal mining.
Jiong Wang
exaly   +2 more sources

Control mechanism and technique of floor heave with reinforcing solid coal side and floor corner in gob-side coal entry retaining

International Journal of Mining Science and Technology, 2012
Abstract Floor heave is the most common convergence in gob-side entry retaining. The paper analyzes the form, process and characteristics of gob-side entry retaining with the comprehensive methods of theoretical analysis, numerical simulation and the field trial.
Jian-Biao Bai, Shuqi Ma, Shuai Yan
exaly   +3 more sources

Mechanism of Extruding Flowing Floor Heave in Mining Gateways Using an Elastic Foundation Beam Model

Advances in Civil Engineering, 2022
Considering the action of high bearing pressures, a mechanical model of a coal wall mining gateway is established based on the elastic theory. The stress-strain distribution of the coal body is also discussed.
Pan Chen, Yuan-Xiang Yu, Shuan-Cheng Gu
doaj   +2 more sources

Floor Heave Mechanism and Control Technique of Water‐Rich Soft‐Rock Roadway in Thick Coal Seam

Energy Science & Engineering
The severe deformation of the surrounding rock of the coal floor in Shanghaimiao mining area is affecting the safe, efficient production of mine wells in this region.
Fulian He, Wenli Zhai, Weixin Liu, Ning Sun, Jiayu Song, Jianlong Zhang, Yanhao Wu   +6 more
doaj   +2 more sources

Asymmetric floor heave mechanism and groove cutting pressure relief control technology in mining roadways

Gong-kuang zidonghua
In mining roadways located between solid coal and small coal pillars, the problem of asymmetric floor heave is severe due to the influence of factors such as asymmetric support pressure, plastic deformation of small coal pillars, and weak floor strata ...
HUANG Yutong, ZANG Chuanwei, BAI Yongrui, ZHANG Fan   +3 more
doaj   +2 more sources

Study on the evolutionary mechanism and synergistic control technology of floor heave in deep high-stress roadways. [PDF]

Sci Rep
Yin C, Yin L, Han J, Zhang Y, Gu L, Chen J, Gao Z, Gao Y.   +7 more
europepmc   +2 more sources

Research on Theory and Technology of Floor Heave Control in Semicoal Rock Roadway: Taking Longhu Coal Mine in Qitaihe Mining Area as an Example [PDF]

, 2022
As one of the most common disasters in deep mine roadway, floor heave has caused serious obstacles to mine transportation and normal production activities. The third section winch roadway in the third mining area of Qitaihe Longhu coal mine has a serious
Xuming Zhou, Zhou, Xuming,, Sheng Wang, Meng, Jingjing,, Zhang, Linhan,, Zhen Li, Li, Xuelong,, Dongdong Pu, Linhan Zhang, Jingjing Meng, Wang, Longkang,, Li, Zhen,, Xuelong Li, Longkang Wang, Wang, Sheng,, Pu, Dongdong,   +15 more
core   +1 more source