摘要
内蒙古鲁蒙能源鹰骏三号矿井赋煤地层为侏罗系,煤层围岩为陆相沉积,胶结较差,其稳定性影响着煤矿的安全绿色开采。采用岩体质量系数法、岩体质量指标法等方法,对2煤、2下煤、5煤、8煤及15煤的围岩岩体质量和稳定性进行了评价。结果表明,2煤、5煤、8煤和15煤顶板均为不稳定顶板,煤层掘进回采时要采取软弱岩层支护措施,防止顶板冒落事故的发生。煤层底板岩石抗压强度大多小于10MPa,水稳性差,为软弱破碎底板,在掘进回采时要密切注意煤层底板稳定性变化情况,防止底鼓现象的发生。
The coal seam of Yingjun No.3 mine of Inner Mongolia Lumeng Energy belongs to Jurassic,and the coal seam surrounding rock is terrestrial sedimentation with poor cementation.Its stability affects the safe and green mining of the coal mine.The stability affects the safe and green mining of the coal mine.Two methods,the rock mass quality coefficient method and the rock mass quality index method,were used to evaluate the rock mass quality and stability of the surrounding rocks of main coal seams 2,2L,5,8,and 15.The results show that the roofs of coal seams 2,5,8,and 15 are all unstable.Weak rock support measures should be taken during coal seam excavation and mining to prevent roof caving accidents.The compressive strength of the coal seam floor rock is mostly less than 10MPa,with poor stability.It is a weak and broken floor.During excavation and mining,close attention should be paid to the stability changes of the coal seam floor to prevent the occurrence of floor heave.
作者
蒋旭辉
JIANG Xuhui(CNACG Huasheng Hydrogeological Survey Co.,Ltd.,Handan,Hebei 056004)
出处
《中国煤炭地质》
2023年第11期60-64,共5页
Coal Geology of China
