摘要
为了预防彬长矿区特厚煤层顶水开采时"冒落带与裂缝带"导通洛河组含水层而发生水害事故,在对该矿区内的矿井裂高采高比研究的基础上,利用"三下"采煤规程和相关综放开采导水裂缝带高度公式分别计算预计了该矿区最大导水裂缝带高度,研究确定了该矿区煤层可采厚度和所适宜的预采顶分层综放或一次采全高综放2种开采工艺,结果表明:若采用预采顶分层综放开采工艺实现顶水安全开采,保证底分层开采厚度不超过7.5 m,顶分层采高应不超过3.5 m。若采用一次采全厚综放工艺时,可据区域主采煤层至洛河组的距离开采时依裂高采高比不大于20来确定合理的采高,严格控制采高,采取间隔放煤方法,严防过度放煤,同时生产中要加强顶板管理,加强矿压监测分析,保证工作面安全顶水开采。
During the coal mining in ultra thick seam under water body in Binchang Mining Area,in order to prevent water disaster accident occurred when caving zone and zone above coal mining face connected with aquifer of Luohe Formation,based on the study on ratio between cracking height and mining thickness of sevelal mines in mining areas,the‘under three objects＇ coal mining regulations and height calculation formula of water flow fractureabed zone above fully mechanized top coal mining face were applied to individually calculate and predict the height of the max water flow crack zone in the mining area and to study and determine the mineable thickness of seam in mining area and the suitable pre- mining top slicing fully mechanized top coal caving mining or one passing full seam fully- mechanized top coal caving mining. The results showed that when the fully- mechanized top coal mining technology with a pre- mining of top slice applied to realize a safety mining under the water body,in order to ensure the low slice mining thickness not over 7. 5 m and the top slice mining height not over 3. 5 m. When one passing full seam fully mechanized top coal mining technology applied,the coal mining height could be determined according to distance between main mining seam and Luohe Formation in mining area with the ratio between the crack zone height and the mining thickness not over 20,the mining height should be seriously controlled. An interval top coal caving method should be applied to prevent the over- caving of top coal. During the coal production period,the roof control should be enhanced and the analysis on mine strata pressure monitoring and measuring should be enhanced to ensure safety mining of coal mining face under water body.
出处
《煤炭科学技术》
CAS
北大核心
2015年第11期22-26,128,共6页
Coal Science and Technology
关键词
综放开采
顶水开采
导水裂缝带
特厚煤层
fully-mechanized top coal caving mining
mining under water body
water conducted zone
ultra thick coal seam
