| The shortest distance between Wugang Wulongquan open mining boundary andBeijing-Guangzhou railway was only about100m, geological conditions of mining area iskarst.the lowest level of the current open mining is+43m, slightly higher than the railwayroadbed height. With+43m the following steps of mining, the surrounding groundwaterflows to open mining, forming a landing funnel of groundwater level, may affect thegroundwater of the roadbed, threatens the safety of railway roadbed.Using Lizhenggeotechnical software, Construction of different mining depth under the conditions ofseepage numerical-simulation, research change degree and scope of mining pit surroundinggroundwater, and the impact on Railway Subgrade, put forward the reasonable miningdepth and its corresponding control measures. Conclusions of the study are as follows:（1）Based on the Lizheng geotechnical software, according to the hydrogeological andengineering geological conditions data, build seepage numerical-simulation of+31m,+19m and+7m as the object to research, get different effect range of different groundwaterdepth, and analyzes the different mining safety distance with different railway depth.（2） Puts forward corresponding measures for protection of railway roadbed due to openmining in deep to process may affect the stability of railway roadbed. Curtain grouting toblock groundwater of pit to prevent seepage and karst collapse, so as to protect the therailway; establish monitoring network to measure the of groundwater and the groundsurface deformation in pits surrounding Beijing-Guangzhou railway, progress safety earlywarning. |
