煤矿安全2019，Vol.50Issue(5)：31-34,38,5.DOI:10.13347/j.cnki.mkaq.2019.05.008
承压水作用下切顶卸压对煤层底板破坏深度影响的试验研究
Experimental Study on Effect of Reducing Mine Pressure by Cutting Roof Strata on Failure Zone Depth of Coal Seam Floor Under Confined Aquifers
摘要
Abstract
To study the effect of reducing mine pressure by cutting roof strata on the depth of floor strata failure zones above the confined aquifers, a simple confined aquifer simulation device was developed based on a two-dimensional similar simulation test bed. Stress and displacement were respectively monitored by dynamic strain gauge and total station electronic distance meter. The variation of stress field in surrounding rock and the failure depth of floor strata were got under the conditions of both cutting roof strata and conventional mining conditions. The test results show that there is little difference in fracture conduction zone damage near water body between the two conditions, and the variation trend of the monitored stress is similar, while the stress disturbance intensity is different. The floor failure depth without roof cutting is greater than that under roof cutting, which indicates that the reasonable design of roof cutting can reduce the failure depth of floor to a certain extent.关键词
承压水/相似试验/切顶/卸压开采/底板破坏深度Key words
confined water/similar test/cutting roof/pressure relief mining/fracture depth of floor分类
矿业与冶金引用本文复制引用
李见波,郝伟,王新梅..承压水作用下切顶卸压对煤层底板破坏深度影响的试验研究[J].煤矿安全,2019,50(5):31-34,38,5.基金项目
国家重点研究计划资助项目(2017YFC080420105) （2017YFC080420105）
