软及硬煤层钻孔卸压效果对比分析研究  

Study on Comparison and Analysis on Pressure Releasing Effect of Boreholes in Soft and Hard Seam

作　　者：易恩兵[1,2] 牟宗龙[1,2,3] 窦林名[1,2] 居建国[4] 谢龙[1,2] 徐大连[4] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221008 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221008 [3]兖矿集团有限公司博士后科研工作站,山东邹城273500 [4]徐州矿务集团有限公司张双楼煤矿,江苏沛县221616

出　　处：《煤炭科学技术》2011年第6期1-5,85,共6页Coal Science and Technology

基　　金：国家重点基础研究发展规划(973计划)资助项目(2010CB226805);煤炭资源与安全开采国家重点实验室自主研究课题资助项目(SKLCRSM10X05);江苏高校优势学科建设工程资助项目(PAPD);山东省博士后创新项目专项资金资助项目(201002009)

摘　　要：为分析冲击矿压矿井软煤层钻孔卸压效果比硬煤层好这一问题,通过采用有限元数值模拟软件FLAC对软及硬煤层的大直径钻孔卸压效果进行了分析研究,结果表明：当钻孔深度达到10~15 m时,软煤体内应力35 MPa,硬煤体内应力29 MPa,并且软煤体35 MPa的应力大于硬煤体29MPa的应力,从而说明软煤层中实施钻孔卸压效果较好,硬煤层中钻孔卸压效果较差,最后对张双楼煤矿7123工作面实施大直径钻孔卸压,卸压效果与数值模拟结果一致。In order to analyze a issue of the borehole pressure releasing effect in the soft seam better than the borehole pressure releasing effect in the hard seam of the mine with mine pressure bumping,the finite element numerical simulation software FLAC was applied to the analysis and study on the large diameter borehole pressure releasing effects in soft seam and hard seam.The results showed that when the borehole depth reached at 10~15 m,the inner stress of the soft seam would be 35 MPa and the inner of the hard seam would be 29 MPa.The 35 MPa stress scope of the soft seam would be higher than the 29 MPa stress of the hard seam.Therefore the borehole pressure releasing effect conducted in the soft seam would be good and the borehole pressure releasing effect conducted in the hard seam would be poor.The large diameter borehole pressure releasing operation was conducted in No.7123 coal mining face of Zhangshuanglou Mine and the pressure releasing effect was the same to the numerical simulation results.

关 键 词：冲击矿压 大直径 钻孔卸压 数值模拟 应力集中 卸压效果 

分 类 号：TD323[矿业工程—矿井建设]