CAJ | 학술논문

分析了庞庞塔扩区5＃、9＃主采煤层水文地质条件及突水危险性,认为5＃、9＃煤层底板岩性组合、构造条件及回采底板破坏深度均有利于带压开采.根据5＃、9＃煤层奥灰突水系数的计算及突水等值线图的编绘分析,认为5＃煤层一、二采区内钻孔控制点为安全区,9＃煤层一采区全区和二采区浅部为相对安全区,但二采区深部奥灰突水系数已大于0.06 MPa/m,已进入奥灰突水相对危险区,必须进行专门带压开采设计及制定必要的防治水工程预案才能进行带压开采.
분석료방방탑확구5＃、9＃주채매층수문지질조건급돌수위험성,인위5＃、9＃매층저판암성조합、구조조건급회채저판파배심도균유리우대압개채.근거5＃、9＃매층오회돌수계수적계산급돌수등치선도적편회분석,인위5＃매층일、이채구내찬공공제점위안전구,9＃매층일채구전구화이채구천부위상대안전구,단이채구심부오회돌수계수이대우0.06 MPa/m,이진입오회돌수상대위험구,필수진행전문대압개채설계급제정필요적방치수공정예안재능진행대압개채.
In this paper,the author analyzed the hydrogeological conditions and water inrush risk in No.5 and No.9 primary mineable coal seams of Pangpangta expansion area,which showed that the lithological association,structural conditions and failure depth of stoping floor in No.5 and No.9 coal seam floors were conducive to the mining under pressure. According to the calcula-tion of water bursting coefficient in Ordovician limestone and the compilation analysis of water bursting contour map in No.5 and No.9 coal seams,the drilling control points in the first and second mining areas of No.5 coal seam were identified as safe areas,and the whole first mining area and shallow part of the second mining area in No.9 coal seam were comparative safe areas, while the water bursting coefficient in Ordovician limestone in the deep second mining area in No.9 coal seam was greater than 0.06 MPa/m. So the deep second mining area had turned into comparative dangerous area,and special design of mining under pressure and engineering plan of water prevention and control must be conducted for mining under pressure.