特厚煤层采掘对穿巷道支护技术研究

Study on Supporting Technology of Roadway Heading for Adjacent Advancing Coal Face with Extra-thick Coal Seam

针对特厚煤层采掘对穿强烈动压巷道支护难题,在分析地质力学特征的基础上,采用数值模拟确定合理煤柱尺寸,分析了强烈动压影响下托顶煤巷道的变形特点,结合高预应力强力锚杆支护理论,提出合理的支护设计。井下实践表明,该设计支护效果良好。

The supporting technology of roadway heading for adjacent advancing coal face with extrathick coal seam is a typical difficult problem in coalmine.Based on the analysis of the geological and mechanical characteristics,the numerical simulation is used to determine the suitable coal pillar width,and the deformation characteristics of the supporting top-coal roadway under the influence of the strong dynamic pressure are analyzed.Combined with the theory of high prestress bolt supporting,the reasonable roadway support design is put forward.The underground practice shows that the support effect is good.