沿空巷道围岩压力特征及合理支护原则  

Surrounding Rock Pressure Characteristics and Reasonable Support Principle of Gob-side Entry

作　　者：王同旭[1] Wang Tongxu(School of energy and mining engineering Shandong University of science and technology,Qingdao Shandong 266590 China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东青岛266590

出　　处：《同煤科技》2021年第4期1-7,11,共8页Datong Coal Science & Technology

摘　　要：沿空巷道因受邻近工作面采动压力影响,因而较实体煤巷道更难以维护,是煤矿最难维护的巷道之一。沿空巷道稳定性,主要取决于巷道围岩的压力特征,包括邻近工作面采动压力及本工作面采动压力的动载作用方式、动载作用持续时间等。根据煤柱宽度及掘巷时间从压力特征角度进行了沿空巷道分类,阐述了各类沿空巷道的压力特征与矿压显现特点。沿空巷道支护须根据不同巷道类别的压力特征进行设计,强调了加大动压区临时加强支护范围和支护强度的重要性,最后通过3个案例介绍了不同类别沿空巷道的围岩压力特征与矿压显现规律。Affected by the mining pressure of the adjacent working face,the gob-side entry is more difficult to maintain than the solid coal roadway,which is one of the most difficult to maintain in the coal mine.The stability of gobside entry mainly depends on the pressure characteristics of roadway surrounding rock,including the mining pressure of adjacent working face and the dynamic load action mode and duration of mining pressure of this working face.According to the width of coal pillar and roadway excavation time,the gob-side entry is classified from the perspective of pressure characteristics,and the pressure characteristics and ground pressure behavior characteristics of various gob-side entry are expounded.The support of gob-side entry must be designed according to the pressure characteristics of different roadway types,and the importance of increasing the temporary support range and support strength in dynamic pressure area is emphasized.Finally,the surrounding rock pressure characteristics and ground pressure behavior law of different types of gob-side entry are introduced through three cases.

关 键 词：支承压力 沿空巷道分类 动压特征 基本支护 加强支护 案例分析 

分 类 号：TD353[矿业工程—矿井建设]