近距离倾斜煤层采掘顺序对巷道矿压影响的研究  

Study on mining and excavation sequence in contiguous inclined seam affected to mine pressure of gateway

作　　者：孟凡刚[1] 党海波[1] 

机构地区：[1]开滦(集团)有限责任公司东欢坨矿业分公司,河北唐山064002

出　　处：《煤炭科学技术》2015年第9期129-133,148,共6页Coal Science and Technology

摘　　要：基于巷道围岩稳定性控制理论,根据煤层赋存特征和工作面空间关系,建立FLAC3D数值模拟方案,分为先采后掘再采和先掘后采再采2套方案,分别就8号煤层采动和9号煤层采动对3093回风巷的影响进行了分析,从超前支承压力、底板采动压力和侧向支承压力3个方面分别对2089工作面和3093工作面的采动影响范围进行分析。研究结果表明:先掘后采方案所得的巷道围岩塑性区深度为3 m,顶板下沉量为65 cm,先采后掘方案所得的巷道围岩塑性区深度为0.5 m,顶板下沉量为22cm,应该优选先采后掘方案。Based on surrounding rock stability control theory of mine roadway, according to seam formation features and space relationship of coal mining face, a FLAC3D simulation pane was established.There were two planes of mining first/late excavation/mining again and ex- cavation first/late mining/mining again.An analysis was conducted on mining operation in No.8 seam and mining operation in No.9 seam affected to No.3093 tailentry gateway.An analysis was conducted on three aspects of advance support pressure, floor mining pressure and lateral support pressure affected to mining scope of No. 2089 coal mining face and No. 3093 coal mining individually. The study results showed that excavation first and mining second plan would have a depth of 3 m in the plastic zone of surrounding rock along roadway and roof subsidence value was 65 era.The mining first and excavation second plan would have a depth of 0.5 m in the plastic zone of surround- ing rock along roadway and roof subsidence value was 22 cm.Thus the mining first and excavation second plan should be optimized.

关 键 词：顶板破裂 巷道稳定性 矿山压力 采掘顺序 

分 类 号：TD325[矿业工程—矿井建设]