摘要
综采工作面过空巷时顶板控制效果直接决定着能否安全顺利过空巷,尤其是弱胶结软岩条件下。在分析空巷工程地质条件的基础上,构建工作面过空巷支护结构力学模型,提出锚索加木垛为主的非对称性补强支护,并进行现场应用。结果表明:随工作面不断推进空巷整体表面移近量有所增加,增量不明显。顶板(锚索)受力呈现先增后减的趋势,距离工作面55~65 m时开始急剧上升,在15~22 m处达到压力峰值,峰值压力约为127 kN,没有超出补强控顶支护极限;支架受力较之前回采时有所降低,平均降低18%左右。研究结果表明,该顶板联合补强措施能够保证空巷在工作面回采过程中顶板稳定,现场应用效果明显。
The roof control effect of fully mechanized coal face directly determines whether it can pass through the roadway safely and smoothly,especially under the condition of weak cemented soft rock.Based on the analysis of the engineering geological conditions of the back alley,the mechanical model of the supporting structure of the working face passing through the back alley is constructed,and the asymmetrical reinforcing support mainly composed of anchor cable and wood crib is put forward and applied in the field.The results show that with the continuous advance of the working face,the approach amount of the whole surface of the roadway increases,but the increment is not obvious.The stress on the roof(anchor cable)increases first and then decreases.It starts to rise sharply when it is about 55 to 65 m away from the working face.It reaches the peak pressure at 15 to 22 m,and the peak pressure is about 127 kN,not exceeding the support limit of reinforcement and roof control;the stress of the support is lower than that of the previous mining,with an average reduction of about 18%.The research results show that the combined reinforcement measures of the roof can ensure the stability of the roof in the mining process of the working face,and the field application effect is obvious.
作者
张闯
李培贤
任强
贺小平
周凯
于凤海
王博
杜盼
贾小玉
ZHANG Chuang;LI Peixian;REN Qiang;HE Xiaoping;ZHOU Kai;YU Fenghai;WANG Bo;DU Pan;JIA Xiaoyu(Ordos Haohua Hongqingliang Mining Limited Company,Ordos 017000,China;Ordos Supervision Branch of Inner Mongolia Coal Mine Safety Supervision Bureau,Ordos 017000,China;State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and Ministry,Shandong University of Science and Technology,Qingdao 266000,China)
出处
《煤炭技术》
CAS
北大核心
2022年第1期54-58,共5页
Coal Technology
关键词
弱胶结软岩
空巷
支护
现场监测
weak cemented soft rock
abandoned roadway
support
field monitoring