摘要
针对我国西部沟谷区域浅埋厚煤层开采易发生动载矿压灾害、地表采动损害、覆岩导气裂缝造成的采空区地表漏风等影响工作面安全绿色开采的科技难题,采用现场实测、三维地质建模、数值模拟、理论分析和现场工业性试验相结合的研究方法,研究了沟谷区域浅埋煤层开采动载矿压发生机理、地表采动裂缝形成机理以及覆岩导气裂缝时空分布特征。结果表明:沟谷区域浅埋厚煤层开采动载矿压事故的发生受到地表沟谷形态、工作面与地表沟谷空间位置关系以及工作面支护条件等的综合影响;地表采动裂缝及覆岩导气裂缝随覆岩失稳运动呈现动态性变化特征,裂缝贯通发展区内导气裂缝导气性能随其距工作面距离的增大而减弱。形成了沟谷区域浅埋厚煤层安全绿色开采的相关理论与系列控制技术,现场应用取得了显著的技术效果和经济效益。
In view of the technological difficulties in the safety green mining of shallow thick coal seam mining in gully area of Western China,such as dynamic strata pressure accident,surface mining damage and surface air leakage caused by overburden air leakage fissures,field measurements,three-dimensional geological modeling,numerical simulation,theoretical analysis and industrial field tests are adopted to study the dynamic strata pressure occurrence mechanism,surface mining-induced fissures formation mechanism,spatio-temporal distribution of overburden air leakage fissures in the mining of shallow thick coal seam mining in gully area.The results show that the dynamic strata pres-sure accident of shallow thick coal seam mining in gully area is affected by the shape of surface gully valley,the spatial relation between working face and surface gully valley,and the supportingconditions of working face.Surface mining-induced fissures and overburden air leakage fissures arechanged dynamically with the advancing of working face.The gas conductivity(air leakage speed)ofair leakage fissures in fissure propagation zone decreases with the increase of its distance from theworking surface.The related theory and series control technologies of safe and green mining of shallowthick coal seam mining in gully region are obtained.And the field application achieves remarkable technicaleffects and economic benefits.
作者
刘长友
李建伟
赵杰
陈毅琪
张涵锐
余鑫
LIU Changyou;LI Jianwei;ZHAO Jie;CHEN Yiqi;ZHANG Hanrui;YU Xin(School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou,Inner Mongolia 014010,China;Inner Mongolia Zhunge'er Qi Yun-fei Mining Co Ltd,Ordos,Inner Mongolia 010400,China)
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2023年第5期965-971,共7页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(52074267,51864036)。
关键词
沟谷区域
浅埋煤层
动载矿压
采动损害
导气裂缝
控制技术
gully area
shallow coal seam
dynamic strata pressure
mining-induced ground damage
air leakage fissures
control technology
