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综放大断面全煤巷采用“锚网梁”支护,很大程度上确保了施工安全和质量;但回风顺槽受超前应力影响,变形严重,必须进一步解决巷道矿压显现严重,支护困难、掘进速度慢,顶板破碎离层、上帮肩角片帮、下帮侧压变形、底板靠近上帮侧鼓起等巷道断面剧烈收缩的问题,寻求更加合理、科学的支护手段。而采用钻孔卸压、顶板及巷帮加固、起底卸压、三维锚索支护等新工艺技术,稳定和巩固了锚网梁支护,是完善综放大断面全煤巷“锚网梁”支护最有效的手段。
The fully mechanized coal caving of large section with “anchor net beam” support, to a large extent, to ensure the safety and quality of construction; However, the return airway by the lead stress, deformation is serious, we must further solve the roadway pressure appears serious, support Difficulties, slow tunneling, the roof broken apart, the top of the shoulder gusset, the next to help the lateral pressure deformation, the floor near the side of the bulge and other side of the violent contraction, to seek more reasonable and scientific support means. The use of drilling pressure relief, roof reinforcement and the alley to help relieve pressure at the end, three-dimensional anchor cable support and other new technology to stabilize and consolidate the anchor mesh beam support, is to improve fully mechanized coal caving large cross-section “anchor net beam ”The most effective means of support.