复杂地质条件下工作面冲击地压危险判识及防治技术研究

Research on Danger Identification and Prevention Technology of Rock Burst in Working Faces under Complex Geological Conditions

  • 摘要: 为应对复杂地质条件下工作面冲击地压问题,以兖州煤业股份有限公司济三煤矿B4300工作面为对象,针对工作面的煤层赋存特征、顶底板特征、煤岩冲击倾向性及地应力影响等地质因素进行了详细分析,进而分析了相邻采空区、巷道交叉及开采布局等开采技术因素对冲击危险的影响,通过大直径钻孔卸压和顶板超前预裂爆破相结合,提出了动静载荷分源防治技术,实施后,每日震动次数同比下降了39.1%,平均每日震动总能量同比下降了42.9%,平均每日最大震动能量同比下降了50.4%,冲击总能量下降42.9%,最大震动能量降幅达50.4%,有效降低了震动次数和能量,综合技术成本降低37%,钻孔数量减少25%,为类似工程条件提供了技术参考。

     

    Abstract: In order to address the problem of rock burst in working faces under complex geological conditions, taking the B43lower00 working face of Jining No.3 Coal Mine of Yanzhou Coal Industry Co., Ltd. as the object, aiming at the geological factors such as coal seam occurrence characteristics, roof and floor characteristics, coal rock impact tendency, geostress influence and others of the working face, a detailed analysis is conducted. Furthermore, the influence of mining technology factors such as adjacent goaf, roadway intersection, mining layout and others on impact danger is analyzed. By combining large-diameter drilling pressure relief and roof advanced pre-splitting blasting, a dynamic and static load source separation prevention technology is proposed. After implementation, the daily vibration frequency is decreased by 39.1% year-on-year, the average daily total vibration energy is decreased by 42.9% year-on-year, the average daily maximum vibration energy is decreased by 50.4% year-on-year, the total impact energy is decreased by 42.9%, and the decrease of the maximum vibration energy is 50.4%, effectively reducing the vibration frequency and energy, reducing the comprehensive technical costs by 37%, and reducing the number of boreholes by 25%, providing technical references for similar engineering conditions.

     

/

返回文章
返回