摘要
为弄清肖家洼煤矿下部煤层采动对上覆煤层巷道破坏特征及围岩控制,分析了肖家洼煤矿8号煤和13号煤下行开采方法,下部13号煤工作面和上覆8号煤工作面存在压茬,下部采空区垮落对上覆巷道有应力影响,通过矿压观测和三带高度发育试验得知:将上下煤层水平错距调整到85 m,下部巷道支护参数优化为锚索梁+组合锚索+锚杆钢筋梯联合支护,可有效减小巷道形变量,降低巷道维护成本,对矿井安全生产有重要指导意义。
In order to clarify the damage characteristics and surrounding rock control of the overlying coal seam roadway caused by the mining of the lower coal seam in Xiaojiawa Coal Mine,the mining method of No.8 coal and No.13 coal in Xiaojiawa Coal Mine was analyzed.There was stubble in the No.1 coal working face,and the caving of the lower goaf had a stress effect on the overlying roadway.It was known from the mine pressure observation and the three-zone height development test that the horizontal dislocation distance of the upper and lower coal seams was adjusted to 85 m,and the lower roadway supports the parameter optimization was anchor cable beam + combined anchor cable + anchor rod reinforced ladder joint support,which could effectively reduce the deformation of the roadway and reduce the maintenance cost of the roadway,which had important guiding significance for mine safety production.
作者
王洁
尚延辉
WANG Jie;SHANG Yan-hui(Production Technology Department,Xiaojiawa Coal Mine,Shanxi Jinxing Energy Co.,Ltd.,Lüliang 035300,China)
出处
《煤炭科技》
2022年第2期67-70,74,共5页
Coal Science & Technology Magazine
关键词
下行开采
矿压规律
围岩控制技术
巷道支护
巷道布置
downward mining
mine pressure law
surrounding rock control technology
roadway supporting
roadway layout