Results 111 to 120 of about 64,796 (273)

Research on Mechanisms and Control Measures of Surrounding Rock Disaster in Large Section Roadway with Top Coal under the Influence of Tectonic Stress

Shock and Vibration, 2021
Based on the research background of large section roadway with top coal (LSRTC) in thick coal seam mining in Wangzhuang Coal Mine, Shanxi Province, China, catastrophe characteristics of the surrounding rock of the LSRTC were investigated and summarized ...
Yang Yu, Jianfei Lu, Dingchao Chen, Yuxin Pan, Xiangqian Zhao, Cheng Chen   +5 more
doaj   +1 more source

Increasing ecological safety during underground mining of iron-ore deposits [PDF]

, 2018
Purpose. To create the technology increasing the level of ecological safety of underground mining of iron ores by means of decreasing the number of harmful substances released into the atmosphere. Methodology. Laboratory and industrial research studies
Khomenko, O.Ye, Kononenko, M.M, Myronova, I.G, Sudakov, A.K   +3 more
core  

Study on Deformation Law of Crossing Layer Drilling Superimposed Floor Roadway

Energy Science &Engineering, EarlyView.
Based on deformation law of crossing layer drilling superimposed floor roadway, low dip angle drilling is particularly susceptible to complications such as borehole blockage and collapse. ABSTRACT Floor extraction roadway crossing layer drilling is a pivotal strategy for gas control in areas prone to coal and gas outbursts.
Xiao Liu, Bo Li, Jiawei Xie, Xiaoming Ni, Shaoren Wei, Chengtao Yang, Yubo Zhang, Haixiao Lin, Wei Zhao, Tao Wang   +9 more
wiley   +1 more source

Research on energy evolution law and control method of deformation of high stress roadway surrounding rock

Meitan xuebao
Aiming at the problem of deformation and damage of surrounding rock in the roadway of coal mine back to mining, the study is carried out from the perspective of plastic dissipation generated by surrounding rock, so as to form a stable system in terms of ...
Hongtao LIU, Zhou HAN, Zihan CHEN, Zijun HAN, Qingyu LIU, Hongkai ZHANG, Dandan ZHANG, Jialu LIANG   +7 more
doaj   +1 more source

Intensive Cultural Resources Survey of the Proposed Wurzbach Parkway Extension Project from Blanco Road to Wetmore Road, Bexar County, Texas [PDF]

, 2010
SWCA Environmental Consultants (SWCA) conducted an intensive cultural resources survey on behalf of the Texas Department of Transportation (TxDOT), of the proposed Wurzbach Parkway Extension Project in San Antonio, Texas.
Galindo, Mary Jo, Miller, Kevin A.
core   +2 more sources

Analytical solutions for characteristic radii of circular roadway surrounding rock plastic zone and their application

International Journal of Mining Science and Technology, 2019
In the non-uniform stress field, the surrounding rock plastic zone of the circular roadway shows different shapes under the different confining pressure conditions. Based on the boundary shape characteristics of the plastic zone, the characteristic radii
Xiao-fei Guo, Zhiqiang Zhao, Xu Gao, Xiangye Wu, Nian-jie Ma   +4 more
semanticscholar   +1 more source

Influence of in-situ rock stress on the stability of roadway surrounding rock: a case study

, 2020
In-situ rock stress was measured in the development roadway of Gucheng coal mine at +420 m level by using the stress relief method of hollow inclusion.
M. Ji, H. Guo
semanticscholar   +1 more source

Experimental Investigation of Sensitivity for Coal and Gas Outburst Risk Prediction Indexes in Raw and Tectonic Composite Coal Seams

Energy Science &Engineering, EarlyView.
A comparative study was conducted on gas desorption laws of raw and tectonic coals. The sensitivity of regional and local outburst prediction indexes was compared. Gas content is more sensitive than gas pressure for composite coal seams. K1 can more accurately predict the outburst danger than Δh2 $\Delta {h}_{2}$ in composite coal seams.
Haijun Guo, Xi Xi, Kai Wang, Liang Wang, Yulin Li   +4 more
wiley   +1 more source

Principle and technology of step strengthening control of soft rock argillization roadway in coal mine

Meitan xuebao
The sedimentary rock strata of the coal measure are generally characterised by significant argillity, high water content and weak lithology. The problem of controlling the stability of the surrounding rock in soft rock argillation roadways has become ...
Guichen LI, Haoran HAO, Yuantian SUN, Jinghua LI, Sen YANG, Zeyu SHAO, Xiaofang WO   +6 more
doaj   +1 more source

Interstate 74 Quad Cities Corridor Study Scott County, Iowa and Rock Island County, Illinois Project Number IM-74-1(122)0-13-82 FHWA-IOWA-EIS-09-01-F, February 2009 [PDF]

, 2009
The Federal Highway Administration (FHWA) and the Iowa and Illinois Departments of Transportation (Iowa DOT and IDOT) have identified the Selected Alternative for improving Interstate 74 (I-74) from its southern terminus at Avenue of the Cities (23rd ...

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