摘要
济宁二号井煤层埋藏较深,煤层上方赋存有巨厚无层理的岩浆岩,其失稳运移对安全生产具有潜在威胁。文章以相似模拟实验为手段研究了深部煤层开采过程中高位赋存的岩浆岩的运移机理,得出岩浆岩初次破断为固支梁的下位拉断非全厚破断,且破断后立即失稳;周期破断为全厚回转拉破断,破断后岩浆岩岩块铰结成"梁",不易失稳。
According to the geologic records of 2^# mine in Jining, we conclude that imbedding depth of coal seam is deep, and extra heavy magmata rock without beddings and fractures existed in main roof, its displacement rules and instability have potential threat to the security production. So the similar simulation method is used in research on the instability mechanism and displacement rules of overlying magmata strata at the process of deep coal seam exploitation. The results showed that the magmata strata failure was characterized by their periodic configuration. And the first of that is not the whole rock mass failure but the bottom of strata snapped, then be of instability. The model of magmata rock failure showed rotation and periodic configuration with seam exploitation. When the block of magmata rock failure articulated to be ＂beam＂, it is difficult to be unstable failure.
出处
《西安科技大学学报》
CAS
北大核心
2008年第1期1-5,共5页
Journal of Xi’an University of Science and Technology
基金
教育部高等学校博士学科点专项科研基金项目(20040008025)
关键词
岩浆岩
失稳机理
周期破断
magmata rock
destabilization mechanism
periodic failure
