摘要
以祁南矿32煤层34采区34下2工作面为原型,采用UDEC3.10数值模拟软件,对煤矿开采工作面后方几十米范围内的上覆岩层裂隙发育情况进行了分析,通过模拟工作面100 m×150 m×3 m(走向长×倾向宽×采高)在2 m/d和5m/d开采速度条件下的覆岩裂隙发育规律,比较工作面不同开采速度条件下,工作面后方50 m处覆岩裂隙发育变化情况,优化设计了高位钻孔抽采的终孔高度、压茬距离和倾向控制范围等参数,该参数可为其他矿区高位钻孔抽采方案的确定提供参考。
Taking the No.34low2 coal mining face in the 32 coal seam of Qinan Mine as the prototype,the development behavior of fracture in overlying strata within the dozens of meters behind the mining face was analyzed by numerical simulation software UDEC3.10.The development law of fracture in overlying strata within 100 m×150 m×3 m(strike length × dip width × mining height) of the mining face under the mining rate of 2 m/d,and 5 m/d was simulated.The development behaviors of fracture in overlying strata within 50 m behind the mining face under different mining rates were compared.The optimal design on the terminal position and overlap distance of high-level boreholes as well as boreholes layout range in inclined direction for gas drainage were carried out.These parameters can offer references for the design of gas drainage with high-level borehole in other mining area.
出处
《矿业研究与开发》
CAS
北大核心
2012年第5期75-80,共6页
Mining Research and Development
基金
国家自然科学基金资助项目(50574050)
关键词
高位钻孔
终孔高度
裂隙发育
数值模拟
压茬距离
High level borehole,Terminal position of borehole,Fracture development,Numerical simulation,Overlap distance
