Results 91 to 100 of about 437 (161)

Study on the Control Effect of Borehole Gas Extraction in Coal Seams Based on the Stress–Seepage Coupling Field

Fire
In order to determine the reasonable parameters of high-gas and extra-thick coal seam drainage, considering the factors of the coal seam metamorphic degree, stress condition, gas occurrence state, and permeability dynamic change, the gas desorption ...
Hongsheng Wang, Huaming An, Bingbing Yang   +2 more
doaj   +1 more source

Study on the Mechanism of Intense Strata Behavior and Control Technology for Goaf-Side Roadway in Extra-Thick Coal Seam

Applied Sciences
With the depletion of shallow coal resources, deep extra-thick coal seam mining has become vital for energy security, yet fully mechanized top-coal caving (FMTC) goaf-side roadways face severe challenges of excessive advanced deformation and intense ...
Shuai Yan, Yongjie Wang, Jianbiao Bai, Xiaolin Li, Qundi Qu   +4 more
doaj   +1 more source

Influence of goaf inerting on the “three zones” and study on fire prevention and extinguishing technology in ultra-width working face of extra-thick coal seam

Case Studies in Thermal Engineering
Due to the thickness of the coal and the width of the working face in the extra-thick coal seam and ultra-width working face, the distribution of the oxidation zone in the goaf during mining is different from that of the conventional working face, which ...
Lei Li, Yuzhong Yang, Liyun Wu, LeQiang Zou, Yanwei Liu, Fengjie Zhang, Yaowei Zhai, Wanli Yang, Junqi Lei, Lei Peng   +9 more
doaj   +1 more source

Stability and control of surrounding rock of narrow coal pillar in vertical stratification of extra-thick coal seam

Meitan xuebao
Aiming at the problem of large deformation and instability control of narrow coal pillar in the vertical stratification section of extra-thick coal seam, the stability and control technology of the surrounding rock of narrow coal pillar in extra-thick coal seam are studied by combining theoretical analysis, numerical simulation and field test. Based on
Chao WU, Zhiqiang WANG, Yaoru LIU, Jingkai LI, Xinsheng GENG, Lu LIN, Tingzhao LI, Lei SHI, Peng WANG   +8 more
openaire   +1 more source

Response characteristics of gob-side roadways with pre-split thick hard roofs in extra-thick coal seams: based on strain-softening effects

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
Pre-splitting of the thick, hard roof improved the stress state of gob-side roadways and reduced the degree of plastic failure. Based on the strain softening effect, methods for calculating the plastic softening zone (SZ) and residual zone (RZ) widths of
Yanhao Wu, Fulian He, Deqiu Wang, Kai Tao, Jianlong Zhang, Jiayu Song   +5 more
doaj   +1 more source

Research on rock burst prevention and control technology of steep extra-thick coal seam

Abstract In order to study the prevention and control effect of the emergency relief measures of water injection before blasting on the sharp inclined ultra-thick coal seam, the south mining area of Wudong Coal Mine in Urumqi Mining area of China was taken as the research object. Based on the special geological conditions of the mine field, the
Kaihua Liang, Hong Zhao, Yang Li, Weihui Pan, Fuwu Ma, Nannan LI   +5 more
openaire   +1 more source

Demonstration project of safe and efficient mining operations in extra-thick coal seam [PDF]

Frontiers of Engineering Management, 2017
openaire   +1 more source

Mechanism and control strategies for asymmetric floor heave in extra-thick coal seam roadways under high stress. [PDF]

Sci Rep
Zhang J, Sun J, Wang B, Yang T, He Y, Gao S, Qin G, Zhang Y.   +7 more
europepmc   +1 more source

Demonstration Project of Safe and Efficient Mining Operations in Extra-thick Coal Seam [PDF]

Frontiers of Engineering Management, 2016
openaire   +1 more source

Mechanism of reverse deformation increase in the virgin coal rib compared to the pillar rib of the gob-side entry in an extra-thick coal seam. [PDF]

Sci Rep
He W, Chen D, Zhu H.
europepmc   +1 more source