火区下煤层群覆岩移动规律及安全开采  

Movement Law of Overlying Strata and Safety Mining of Coal Seam Group Under Fire Zones

作　　者：王方田[1] 屠世浩[1] 高杰[1] 窦凤金[1] 

机构地区：[1]中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2010年第2期171-174,共4页Journal of Mining & Safety Engineering

基　　金：煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM09X02);江苏省“青蓝工程”项目

摘　　要：根据石圪节矿3#,8#及9#煤地质生产条件,3#煤火区与下组煤空间位置关系,应用理论计算、离散元法数值模拟研究了下组煤开采覆岩移动规律.研究表明,3#煤采动底板破坏深度为10.6 m,当煤层赋存稳定时,下组煤裂隙发育高度共45.43 m,小于层间距,下组煤与火区不会发生裂隙导通,而在切眼及停采线处覆岩裂隙发育较高,顶板"O-X"断裂圈边缘是火区主要导气通道,为此提出了加强火区封闭、重点区域监测监控、构造探测及9#煤工作面内错布置等针对性的保障措施,确保了下组煤的安全开采.We study the the overlying strata movement law affected by the lower coal groups according to geological and production conditions and spatial location relations of coal seams 3#,8# and 9# in Shigejie Mine by using the numerical simulation and discrete element method.The results indicate that the failure depth of 3# coal seam floor is 10.6 m,and the fracture development height of the lower coal groups is totally 45.43 m,less than the top-lower coal seam distance,that＇s why the lower coal seams and the fire zones cannot connect with each other when the coal seams is stable.However,the overlying strata fracture zones develop higher in the open-off cut and terminal line.And the ＂O-X＂ rupture circle of roof is the main air conduct channel with fire zones.Therefore,we put forward some pertinent safeguard measures,such as strengthening fire zones sealing,monitoring the key area,and strengthening the structural detection.In addition,we also take some countermeasures for the purpose of guarantying lower coal seams group mining safety under fire zones for coal seam No.9.

关 键 词：火区 煤层群 覆岩移动规律 内错布置 

分 类 号：TD325[矿业工程—矿井建设]