CAJ | 학술논문

　　考虑采动应力场、岩体承载性能和支护结构强度等因素，分析沿空留巷跨高比对围岩变形的影响，采用数值计算方法对比分析9种不同的跨高比留巷方案，结果表明优化留巷断面形态可充分提高留巷围岩的稳定性和抗变形能力。当巷道高度确定时，随着跨度的降低留巷围岩塑性区分布范围及变形量都不断减小；当巷道高度超过3 m时，围岩变形对跨度降低的变化更为敏感，且跨高比低于1.3时效果明显。在此基础上提出了大采高留巷最优跨高比的确定方法和留巷围岩控制思想，在4.2 m大采高工作面，留巷高度3.8 m、跨高比取0.79，工程实践取得成功。
　　고필채동응력장、암체승재성능화지호결구강도등인소，분석연공류항과고비대위암변형적영향，채용수치계산방법대비분석9충불동적과고비류항방안，결과표명우화류항단면형태가충분제고류항위암적은정성화항변형능력。당항도고도학정시，수착과도적강저류항위암소성구분포범위급변형량도불단감소；당항도고도초과3 m시，위암변형대과도강저적변화경위민감，차과고비저우1.3시효과명현。재차기출상제출료대채고류항최우과고비적학정방법화류항위암공제사상，재4.2 m대채고공작면，류항고도3.8 m、과고비취0.79，공정실천취득성공。
Considering such factors as mining pressure field, rock bearing capacity and support struc-ture strength, the influence of span-height ratio for gob-side entry retaining on surrounding rock defor-mation was analyzed.Numerical simulation models were established for comparative analysis of nine schemes for gob-side entry retaining with different span-height ratio under large mining height, and the results showed that optimized section configuration can substantially improve the stability of and non-deformability of the surrounding rock structure. Plastic range and surrounding rock deformation both decrease with the reduction of roadway span when the roadway height has been determined.The surrounding rock deformation is more sensitive to the reduction of span when the roadway height ex-ceeds 3 m, and the effect of optimization is more evident while the span-height ratio is less than 1.3.On this basis, the determination method and technology thoughts are proposed for optimal span-height ratio of gob-side entry retaining under large mining height, which has been successfully applied to the field test in 4.2 m large mining height face with the roadway height of 3.8 m and span-depth ratio at 0.79.