摘要
神东煤田浅埋煤层存在大量房式遗留煤柱，受下方煤层采动影响可能突然失稳垮落，造成冲击式动力灾害，遗留煤柱稳定性对下方煤层安全开采具有重要影响。针对乌兰集团石圪台煤矿地质生产条件，基于突变理论建立了房式煤柱稳定性尖点突变模型，分析了浅埋煤层房式开采遗留煤柱突变失稳规律。结果表明煤柱发生突变失稳的必要条件为煤柱单侧屈服带宽度介于煤柱宽度的0．33～0．43倍时将发生突变失稳，现场观测验证了计算结果。
Shendong Mine Area is mining in the shallow depth seams and the room mining method results in a lot of residual pillars, which incline to be instability and caving suddenly induced by the nether seam mining, and cause shock type dynamic disasters, hence the stability of the residual pillars have significant implications for the nether seam mining safely. According to the geological and production conditions of Shigetai Mine, Wulan Group, we applied mutation theory to establish a cusp mutation model for studying the room mining residual pillars＇ stability, and discussed the mutation instability rules of the room mining residual pillars in the shallow depth seam. The necessary condition for pillar mutation is that when the hemi-yield width in the scope of 0.33-0.43 of the overall width, the pillar will be mutation instability. Finally the calculation results have conformed to the observations.
出处
《采矿与安全工程学报》
EI
北大核心
2012年第6期770-775,共6页
Journal of Mining & Safety Engineering
基金
国家高技术研究发展计划(863)项目(2012AA062101)
江苏省研究生科研创新计划项目(CX10B_148Z)
江苏省高校优势学科建设工程项目
关键词
浅埋煤层
房式开采
遗留煤柱
突变理论
煤柱稳定性
shallow depth seams
room mining
residual pillar
mutation theory
coal pillar stability
