摘要
在"两硬"条件煤层中实施放顶煤开采,由于采空区遗煤量大、顶板坚硬、冒落块度大、空隙率大、工艺巷给采空区供风和顶板冒落呈现明显的"切冒"特征,使得采空区漏风强度大大增加,采空区氧化自燃带范围加宽,自燃危险程度增加。根据"两硬"特点实施的综合防灭火技术,保障了综放面的安全生产。
If fully mechanized top -coal caving is executed in ＂two- hard＂ coal seams, remaining coal is much in goal, roof is hard, caving size is big, porosity is large, the technology tunnel supplies goal with wind, and roof caving presents considerable ＂cut - caving＂ character, so air leakage strength in goal is increased greatly, the zone of oxidation and spontaneous combustion in goal is widened, and the risk degree of spontaneous combustion rises. Technology of comprehensive fire prevention and extinguishment against ＂ two hard＂ character secures the safe production of fully mechanized top -coal caving face.
出处
《煤炭工程》
北大核心
2007年第10期58-60,共3页
Coal Engineering
关键词
坚硬顶板
坚硬底板
综放
综合防灭火
Two - hard
Fully mechanized top - coal caving
Comprehensive fire prevention and extinguishment
