龙湾井田15号煤层带压开采可行性分析研究

Longwan Coalfield No.15 Coal Seam Mining with Pressure Feasibility Analysis Research

为防止龙湾井田15号煤层开采过程中发生突水事故,对龙湾井田15号煤层底板隔水层构成及空间展布进行分析,15号煤层底板与底板奥陶系地层间距为40.92~2.70 m,平均11.33 m,15号煤层底板承受的水头压力值介于0~7.11 MPa,通过注浆改造工艺,利用奥灰顶部50 m相对隔水层条件下,15号煤层突水系数为0.01~0.123 MPa/m,平均0.050 MPa/m,井田90%以上的区域处于不带压区和带压开采相对安全区。

In order to prevent water burst in No. 15 coal seam mining of Longwan Coalfield, the coal seam floor water-resisting layer and spatial distribution were analyzed, the distance between coal seam floor and bottom Ordovician is 40.92 - 2.70 m, waterhead pressure of No. 15 coal seam floor is 0 - 7.11 MPa, grouting reconstruction process was adopted, under Ordovieian top 50 m relative water-resisting layer condition, the coal seam water burst coefficient is 0.01 - 0.123 MPa/m, average 0.050 MPa/m, more than 90% of the area is in no pressure area and relatively safe mining with pressure.