CAJ | 학술논문

基于张集煤矿1311（1）工作面远距离下保护层开采，利用数值模拟试验对比相似材料模拟试验，分析得出被保护层在保护层法向投影至理论卸压角范围内为扩界区，理论卸压角范围内为充分卸压区。为直观、准确地考察扩界保护范围，在被保护层施工煤巷，分别考察了扩界区域煤层膨胀变形率、巷高变形率、瓦斯自然排放量和透气性系数。研究结果表明张集煤矿11-2煤层的卸压角可由锐角扩大为90°，实现了被保护层工作面等长等宽布置。
기우장집매광1311（1）공작면원거리하보호층개채，이용수치모의시험대비상사재료모의시험，분석득출피보호층재보호층법향투영지이론사압각범위내위확계구，이론사압각범위내위충분사압구。위직관、준학지고찰확계보호범위，재피보호층시공매항，분별고찰료확계구역매층팽창변형솔、항고변형솔、와사자연배방량화투기성계수。연구결과표명장집매광11-2매층적사압각가유예각확대위90°，실현료피보호층공작면등장등관포치。
Based on mining underlying protective seam with long distance in the panel 1311 ( 1 ) of ZhangJi mine,and by the contrast of numerical simulation and similar material test , the extended destressed zone was located between the angles of theoretical destressing and normal projection of protective seam border ;fully de-stressed zone was within the limit of theoretical destressing angle .In order to investigate the extended protec-tive range intuitively and correctly ,the coal roadway was constructed in overlying protected seam 13-1 to test the coal seam swelling deformation rate, height deformation rate of coal roadway , gas emission and permeabili-ty coefficient.The research proved that the destressing angle of 11-2 nearly horizontal coal seam can be ex-panded to 90 °and the equivalent length and width arrangement of protected panel can be realized .