摘要
为了解急倾斜煤层回采过程中不同推进距离对工作面底板突水的影响,采用瞬变电磁法对山东某矿31515工作面底板含水性强弱和含水层位置进行探测,明确了15号煤底板岩层存在徐奥灰含水性较强区域;进而采用有限元差分软件FLAC3D模拟不同推进长度时,承压含水层上急倾斜煤层工作面底板突水通道形成与演化过程,以及随着工作面的推进,底板承压水导升高度与渗流矢量变化情况。结果表明,工作面的回采使底板形成塑性破坏区,并且在底板承压含水层的水的孔隙压力的作用下,承压水导升带与底板采动破坏带导通,从而容易发生煤层底板突水的危险。
In order to understand the influence of different propelling distances on water inrush from the working face floor during the mining of steep inclined coal seam,the authors detected the water-bearing strength and water?bearing position of the working face floor at 31515 of a coal mine in Shandong Province by TEM.Then,the fem difference software FLAC3D was used to simulate the formation and evolution of water inrush channels on the bottom of steep inclined coal seam face in the confined aquifer when different propulsion lengths were simulated.And the change of the pressure water conduction height and seepage flow vector of the bottom plate with the ad?vance of the working face was investigated.The results show that the working face stoping makes the floor form the plastic failure zone,and under the action of the pore pressure of the water in the confined aquifer of the floor,the uplift zone of confined water and the min?ing failure zone of the floor are conductive,thus the risk of water inrush from the coal seam floor is easy to occur.
作者
王玉和
崔增斌
李春朋
WANG Yu-He;CUI Zeng-Bin;LI Chun-Peng(Shandong Science and Technology University(Qingdao),Qingdao 266590,China)
出处
《物探与化探》
CAS
北大核心
2019年第6期1399-1403,共5页
Geophysical and Geochemical Exploration
