浅埋深厚松散层综放工作面覆岩破坏监测技术
Research on Technology of Overlying Strata Failure Monitoring in Fully-Mechanized Caving Coal Face with Shallow and Thick Loose Bed
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摘要: 为得到浅埋深厚松散层工作面覆岩变形和破坏规律,在对阳湾沟煤矿6204综放工作面进行现场实测的基础上,采用孔间地震探测技术、地面钻孔电视窥视技术、覆岩内部位移监测技术和地表沉降监测技术等综合监测覆岩破坏情况,为确定裂隙带高度、判定垮落带和裂隙带的离层情况、掌握地表移动变形规律提供了一个新的技术手段。结果表明:在阳湾沟煤矿6204综放工作面裂隙发育带高度判定中,孔间地震探测和地面钻孔电视窥视监测结果基本一致,其裂隙带埋深分别为110、106m;覆岩内部位移监测和地表沉降监测一体化的监测技术揭示了覆岩自下而上的破坏特征,对于研究浅埋深、厚松散层下综采工作面的覆岩变形和破坏规律实用性较强。Abstract: In order to obtain the law of overlying strata deformation and failure in fully- mechanized caving coal face in coal seam with shallow and thick loose bed, based on the in- situ monitoring of No.6204 fully- mechanized caving coal face in Yangwangou Coal Mine, the seismic detection technique between two boreholes, bor ehole television peer technique, inner strata displacement monitoring technique and surface subsidence monitoring technique were used to monitor deformation and fail ure of overlying strata. The new integrated monitoring technology was provided to determine fissure zone height, analyze the caving zone and fissure zone of abscissio n, master the law of surface movement deformation. The results showed that the seismic detection technique between boreholes accprded with the borehole television peer technique in the fissure zone height determination, and theirs depth were 110, 106 m. The strata displacement monitoring technique and surface subsidence monit oring technique could reveal the failure characteristics of overburden strata from bottom to up. It was with high practical value in researching overburden deformation an d failure characteristics of fully- mechanized caving coal face with shallow and thick loose bed.
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