综放工作面煤层及围岩破坏特征的采厚效应  

Thickness effects of fracture characteristics of coal seam and surrounding rocks in fully mechanized top-coal caving face

作　　者：谢广祥[1] 王磊[1] 

机构地区：[1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《煤炭学报》2010年第2期177-181,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50674003);"十一五"国家科技支撑计划重点资助项目(2008BAB36B01);煤炭深部开采中的动力灾害机理与防治基础研究(2010CB226806);安徽理工大学优秀创新学术团队资助项目

摘　　要：综合采用数值模拟、相似材料模拟和现场实测的方法,着重研究采厚变化对综放工作面煤层及围岩破坏特征影响规律。研究表明:工作面煤层及顶煤的破坏范围与采厚成非线性正比,即煤层和顶煤的破坏范围随着采厚的增大而增加;工作面前端煤层破坏最为发育,同一采厚顶煤中的破坏范围明显大于工作面内煤层的破坏范围;采空区煤柱侧巷道破坏区明显大于工作面实体煤侧巷道,且留设的窄小煤柱临近工作面全部进入破坏状态,因此综放工作面回采巷道稳定性应从控制变形角度重点加强采空区煤柱侧的巷道支护。The influence law of caving thickness of fracture characteristics of coal seam and surrounding rocks in fully mechanized top-coal caving face were researched by numerical simulation, combined with laboratory experiment and in-situ measurement. The results show that the fracture range of coal seam and top-coal and caving thickness have non- linear direct proportion relations, that is, the fracture range of coal seam and top-coal increase with the increase of ca- ving thickness ; the most serious fracture range of coal seam are situated in front caving face, the fracture range of top- coal is bigger than the coal seam of face, the fracture range of the tailentry is bigger than the headentry, and narrow and small coal pillars are damaged with close to the caving face, so the emphasis of entry surrounding rock support in fully mechanized top-coal caving face is gate beside gob from deformation control point of view.

关 键 词：综放工作面 围岩 破坏特征 采厚效应 

分 类 号：TD322[矿业工程—矿井建设]