深部高强开采下巷道大变形及卸压的支护技术  

Study on roadway deformation under deep and high intensity mining and pressure release method

作　　者：金珠鹏[1,2] 秦涛 张俊文 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]黑龙江科技大学矿业工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2017年第4期378-382,共5页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金项目(51574114;51604100);国家重点研发计划专项资助项目(2016YFC0600901)

摘　　要：为研究围岩应力随釆高的演化规律和相邻采空区对沿空顺槽围岩应力的影响,以城山煤矿3B#煤层145大釆高工作面沿空顺槽为研究对象,采用FLAC3D和力学分析的方法研究深部高强开采下采动应力演化特征和沿空顺槽顶板结构特征。工作面周围选取3个测站,一个测站设置在轨道大巷中,另外两个测站分别在联络巷巷口以及回风顺槽中。结果表明:釆高增大,应力集中程度增加,峰值位置前移,应力集中区范围扩大;相邻采空区会进一步增加端头附近应力集中程度,开采方式会对这种应力集中造成影响。该研究通过现场实践验证了深部高强开采下卸压支护对策的有效性。This paper is an investigation into the evolution law underlying the stress of surrounding rocks varying with the mining height and the influence of adjacent goaf on the surrounding rock stress on the gob-side entry. The investigation focused on the gob-side entry on the 3B# coal seam 145 working face of Chengshan coal mine as the research object involves identifying the mining stress evolution characteris- tics and the structural characteristics of gob-side entry under the deep high-strength mining using the FLAC3D and mechanical analysis methods and using the measurements of three stations around the working face-one in the orbital alleys and the other two stations in the contact entry and return airway cross-head- ing entry. The results show that an increase in the height and the consequent increase in stress concentra- tion contribute to an advance in the peak position, widening the stress concentration zone; the adjacent goal tends to further increase the stress concentration near the end which is affected by the mining meth- od. The field practice verifies the effectiveness of the countermeasures on the pressure relief support un- der deep high-strength mining.

关 键 词：深部开采 高强开采 卸压 

分 类 号：TD322[矿业工程—矿井建设]