跨采巷道的围岩稳定性预测与控制  

Stability Prediction and Control of Surrounding Rocks for Roadway Affected by Overhead Mining

作　　者：张学臣[1] 李大勇[2] 陈士海[2] 李德胜[2] 范德伟[2] 

机构地区：[1]南京优凝舒布洛克公司,江苏南京210000 [2]山东科技大学土木建筑学院,山东青岛266510

出　　处：《采矿与安全工程学报》2008年第3期361-365,共5页Journal of Mining & Safety Engineering

摘　　要：利用数值仿真的方法研究了在移动支承压力作用下,煤层底板巷道围岩的位移、应力和塑性区发展规律以及采煤工作面位置对其底板巷道围岩位移的影响.研究结果表明,在跨采过程中,跨采对底板巷道的影响范围为采煤工作面前65 m至工作面后25 m,同时在应力增高区范围内的巷道围岩位移最大,在应力降低区范围内的巷道围岩位移最小,巷道围岩位移最大值发生在采煤工作面前15 m处,最小值则发生在采煤工作面后5 m处;在采煤工作面的推进过程中其下部巷道顶板、底板和两帮均处在不稳定阶段,可采用锚杆、锚索与注浆联合加固技术措施,以保证底板巷道跨采期间的安全使用.we numerically simulated the rules of floor roadway stress, displacement, development of plastic zone, and rock displacements around floor of roadway at different positions of coal face under moveable supporting pressure. The result shows that the affecting range of floor roadway is in an area 65 m before, and 25 m behind the coal face. The maximal displacement of surrounding rock masse is located in the area where the stress increases while the minimal displacement is located in the area where the stress decreases, with the peak-value of displacement seen in the place 15m before coal face and the minimal value in the place 5 m behind the coal face. In addition, the roof, floor, and two sides of floor roadway is Jr, the phase of instability during coal face advancing. So we took combined reinforcing technical measures such as bolting, cabling, and grouting in order to ensure the safe use of floor roadway.

关 键 词：跨采 稳定性 支承压力 底板巷道 塑性区 

分 类 号：TD322[矿业工程—矿井建设]