松软破碎围岩煤巷强帮强角支护控制技术

Sidewall and Corner Strengthening Support Control Technology of Coal Roadway with Soft and Broken Surrounding Rock

新峪煤矿D1206工作面的材料巷为松软破碎围岩煤巷,为控制其稳定性,分析了松软破碎围岩煤巷的矿压显现特征及破坏机理,采用数值模拟方法,对原支护方案及多种优化方案对比剖析,提出强帮强角支护控制技术,并应用于工程实践。监测结果表明:最优支护方案巷道围岩变形较小,巷道顶板最大变形量为59 mm,左帮最大变形量为99 mm,右帮最大变形量为134 mm,顶板最大离层量为35 mm,松软破碎围岩煤巷稳定性得到显著提高。强帮强角支护控制技术能够有效控制松软破碎围岩煤巷的变形,通过加强帮部和角部的支护强度,可提高帮部和角部的稳定性,达到提高顶板支护强度的效果,从而增强巷道整体稳定性。

As the material roadway of D 1206 working face in Xinyu Mine was coal roadway with soft and broken surrounding rock,in order to control its stability, the characteristics of strata behavior and failure mechanism were analyzed, and comparative analysis was made be- tween the original and optimized support schemes using numerical simulation method, then the sidewall and comer strengthening support control technology was proposed and applied in engineering practice.The monitoring results showed that the roadway surrounding rock de- formation was small in optimal support scheme,which the maximum deformation of the roof was 59 mm,the maximum deformation of left sidewall was 99 mm ,the maximum deformation of right sidewall was 134 ram, the maximum bed separation volume was 35 mm, thus the stability of coal roadway with soft and broken surrounding rock was proved significantly.The sidewall and corner strengthening support con- trol technology could effectively control the deformation of coal roadway with soft and broken surrounding rock, according to reinforce the support strength of sidewall and corner, the stability of sidewall and corner as well as the roof support strength could be improved, there- fore, the whole roadway stability was enhanced.