|
|
|
STUDY ON STABILITY OF DEEP ROCK ROADWAYS IN COAL MINES
AND THEIR SUPPORT MEASURES |
|
|
|
|
Abstract Based on model test，in-situ investigation，and theoretical analyses，the influencing factors on stability of rock mass surrounding coal-mine roadways 800～1000 m deep are studied. The mechanism for effects of high crustal stress，high-level permeable pressure，and high temperature gradient on the stability of deep roadways is concluded，and corresponding support method and technology are carried out which include a kind of bolts with initial support force of 30～50 kN and peak support force higher than 300 kN and their arrangement in surrounding rock，bottom bolts and their construction tools，fiber-optic monitoring technology for bolt stress for long term，and grouting technology for sealing fractures，cutting seepage off and reinforcing rock mass.
|
|
Received: 28 March 2003
|
|
|
|
| [1] |
LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
|
|
|
|
