Results 101 to 110 of about 7,653 (230)

Research on simulation technology of surface air leakage of shallow-buried goaf based on network calculatio

Gong-kuang zidonghua, 2017
In order to analyze influence of surface air leakage of shallow-buried coal seam on mine ventilation system and goaf flow field, a coupling model of shallow-buried goaf flow field and roadway ventilation network under surface air leakage was established.
WU Fengliang, HE Xiaochen, CHANG Xintan, MA Li, LI Chao   +4 more
doaj   +1 more source

Evaluation of Bord and Pillar Mining System in MCL Coal Mines [PDF]

, 2010
The importance of mining is definitely significant to human civilization. In fact, as one of the earliest of human enterprises, mining and its development correlate closely with cultural progress Mining is the mother industry for other industries.
Dalai, S K, Nayak, R C
core  

Research on optimization of grouting treatment for underground mining goaf collapse based on 3-dimensional simulation

Frontiers in Earth Science
The collapse of goaf is one of the most serious geological disasters in cities where underground mineral resources are mined. The ground subsidence caused by the goaf limits the social and economic development of the area, while also endangering the ...
Lin Teng, Xiansen Xing, Changze Sun, Zujian Liu, Xiaoshuang Li, Menglong Dong   +5 more
doaj   +1 more source

Research on fire early warning index system of coal mine goaf based on multi-parameter fusion

Scientific Reports
In order to improve the precision of goaf fire early warning outcomes, this paper obtains the temperature characteristic index of goaf fire early warning by using a coal spontaneous combustion thermogravimetric test and a coal spontaneous combustion ...
Beifang Wang, Yuanhao Lv, Chunbao Liu
doaj   +1 more source

Residual subsidence analysis after the end of coalmine work. Example from Lorraine colliery, France [PDF]

, 2005
International audienceThis paper describes the residual movements associated with the deep coalmines. The studied case relates to works located into Lorraine coal basin. The paper is divided into two sections. The first one describes subsidence phenomena,
AL HEIB, Marwan, Nicolas, M., Noirel, J.F., Wojtkowiak, Francis   +3 more
core   +1 more source

Research on supporting technology of roadway passing goaf

Meikuang Anquan, 2021
In order to study the deformation control of the surrounding rock under the broken surrounding rock in the mined-out area, a semicircular arch support technology of “U-shaped shed + grouting” was proposed. Based on the basic mechanical properties of the arch, a mechanical model of the bearing capacity of the semicircular arch roadway was constructed to
ZHOU Bo, XU Mengtang, YIN Lei, LI Xin, ZHANG Wang   +4 more
openaire   +1 more source

Mitigation of air leakage through the goaf of retreat coalfaces [PDF]

, 1999
In HBL (Lorraine coalfield), large amounts of air are used in order to dilute methane in retreat coalfaces. A parasite flow of air exists in the goaf, leading to the risk of spontaneous combustion of remaining coal as well as to a diminution of firedamp ...
Dupond, Pierre-Marie, Pokryszka, Zbigniew, Schroeter, Pierre, Tauziède, Christian   +3 more
core   +1 more source

Skin and bones: correlating the osteological and artefactual evidence [PDF]

, 2003
The aim of this text is to review the osteological evidence from Anglo-Scandinavian and medieval York for the retrieval and working of skins and hides, and to cross-correlate that evidence with the data obtained from studies of leather artefacts ...
O'Connor, T.P.
core  

“Three zones” rule of spontaneous combustion in goaf under overburden separation grout filling

Meikuang Anquan
Overburden separation grout filling (OSGF) technology compacts the fragmented rock mass in the goaf and changes the seepage characteristics and distribution of the “three zones” of spontaneous combustion in the goaf.
Haidong LIU, Yanchi LIU, Baiquan LIN, Ting LIU   +3 more
doaj   +1 more source

Calculation of periodic roof weighting interval in longwall mining using finite element method [PDF]

, 2013
B Singh, Behdeen Oraee-Mirzamani, BHG Brady, E Hoek, E Hoek, GSP Singh, Kamran Goshtasbi, M Monjezi, Mehran Gholinejad, ML Jeremic, Navid Hosseini, PR Sheorey, R Trueman   +12 more
core   +1 more source