Results 71 to 80 of about 4,010 (144)

Mechanism and prevention of coal bursts in gob-side roadway floor under thick and hard roof in the deep mining area of Ordos

International Journal of Coal Science & Technology
The complex stress environment in deep roadways, often exacerbated by thick and hard strata, frequently precipitates coal bursts, posing significant safety hazards.
Jinlong Zhou, Junfeng Pan, Yongxue Xia, Taotao Du, Wengang Liu, Chenyang Zhang   +5 more
doaj   +1 more source

Research on rock burst generation mechanism and three-level collaborative control technology of multi-key strata narrow coal pillar

Meitan xuebao
Taking the 11–3106 working face of Menkeqing Coal Mine as the research background, a fracture model of the structure covered by thick and hard overburden at the 11–3106 working face was established.
Mingyue WENG, Shijie SU, Ruda SUN, Fei XIE, Guoli DING, Yongxue XIA   +5 more
doaj   +1 more source

Research on blasting technology for thick and hard roof fracturing in isolated island coal mine working face

Scientific Reports
Abstract In order to study the prevention and control technology for hard roof type coal burst in the isolated working face of the Chenjiashan coal mine, the 418 isolated working face was selected as the engineering case study. Based on the different impact danger zones and mining areas, a roof breaking blasting pressure relief technical ...
Wei Huang, Gang Jing, Liqiang Ma, Leilei Zhao, Shuai Wang   +4 more
openaire   +3 more sources

Main disaster-causing strata of composite hard roof and bidirectional, high-low position blasting technology for rockburst prevention

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
Theoretical analysis, micro-seismic monitoring, and on-site research were used to examine the main disaster-causing strata of composite hard roof, with a particular focus on rockburst in the working face of thick coal seams.
Xukai Dong, Junwen Zhang, Suilin Zhang, Jining Yang, Chaorui Xing   +4 more
doaj   +1 more source

Practice of deep hole blasting and rapid charging technology for composite thick and hard roof

Meikuang Anquan
In order to control the dynamic pressure behavior of the working face under the condition of composite thick and hard roof, taking a mine in Ordos as an example, through theoretical analysis, it is clarified that the instability of small coal pillar roadway with thick and hard roof is mainly divided into deformation instability and impact instability ...
Huijie BI, Yunlong MO, Shaogang LI
openaire   +1 more source

Stress and microseismic activity in hard roof thick coal seams under varying mining rates. [PDF]

Sci Rep
Gu ST, Guo ZY, Jiang BY, Li WS, Chen HX, Zhang K.   +5 more
europepmc   +1 more source

Synergistic mechanism and stability control of gob-side entry retaining by pressure relief and roadside filling in thick coal seams. [PDF]

Sci Rep
Shen F, Rui X, Liu C, Yang J.
europepmc   +1 more source

Mechanism of reverse fault activation when mining under the condition of thick and hard roof

Meitan kexue jishu
In order to study the mechanical mechanism of the instability of the reverse fault in the working face under the condition of thick and hard roof, the spatial relationship model between the overburden movement area and the fault plane was established through the relationship among the size of the coal pillar at the fault boundary, the fault dip angle ...
Weijian YU, Hanxiao GUO, Ke LI, Ze LIAO, Genshui WU, Bao PAN   +5 more
openaire   +1 more source

Reasonable drilling angle and technology application for pre-cracking thick-hard roofs before driving gob-side roadways in ultra-thick seams. [PDF]

Sci Rep
He F, Wu Y, Wang D, Zhang J, Tao K.
europepmc   +1 more source

Energy Transfer Mechanism of Hard-Roof Hydraulic Fracturing in Goaf-Side Working Face Based on Microseismic-Driven Damage Model. [PDF]

Sensors (Basel)
Zhang R, Gong S, Cai W, Li H, Qiu Y.
europepmc   +1 more source