摘要
随着煤炭资源的持续开发,部分煤矿上组煤已经开采殆尽,亟需开展下组煤的探测工作。受上组煤采空影响,下组煤地震波能量吸收和散射衰减严重,资料信噪比低,三维地震对采空区下组煤的探测尚属于探索阶段。以冀中能源东庞矿采空区下组煤三维地震勘探项目为例,采用"两宽一高"采集、高精度资料处理和属性体解释等技术,对不同年限采空区下组煤的探测效果进行了对比分析。结果表明:采用"两宽一高"采集技术能够获取采空区下组煤的地震信息;振幅补偿、地震拓频技术使得9号煤反射波波组丰富、连续性好;采空区年限大于10年时,破碎岩层压实,相对稳定,下组煤反射波利于追踪,而小于10年时,岩层破碎未压实,导致下组煤反射波能量弱、杂乱无章。这一认识对于类似煤矿采空区下组煤探测具有一定的指导意义。
With the continuous development of coal resources, the upper group of coal in some coal mines has been mined out, and it is urgent to solve the detection problem of the lower group of coal. Affected by the goaf formed by the upper group of coal, the seismic energy absorption and scattering attenuation of the lower group of coal are significant, and the signal-to-noise ratio of the data is low. The detection of the lower group of coal under the goaf by 3 D seismic exploration is still in the exploration stage. In this paper, the 3D seismic exploration project of the lower group coal in the goaf of Dongpang Coal Mine of Jizhong Energy Group is discussed. The detection effect of lower group coal beneath goafs of different ages is compared and analyzed by using the technologies of “2W1H”(Wide-band, Wide azimuth and High-density) acquisition, high-precision data processing and attribute body interpretation. The results show that the seismic information on the lower group of coal can be obtained by using the “2W1H” acquisition technology. The technologies of amplitude compensation and seismic frequency extension make the reflection wave group of No.9 coal seam plenty and continuous. When the goafs’ age is more than 10 years, the broken strata are compacted and relatively stable, and the reflection wave of the lower group of coal is easy to track. When the goafs’ age is less than 10 years, the broken strata are not compacted, leading to weak and disordered reflected wave energy of the lower group of coal. This knowledge has a certain guiding significance for the detection of the lower group of coal in similar coal mines.
作者
张昭
殷全增
ZHANG Zhao;YIN Quanzeng(Coal Geology Geological Team of Hebei Province Bureau,Xingtai 054000,China)
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2021年第6期237-242,共6页
Coal Geology & Exploration
基金
河北省煤田地质局物测地质队科研项目(HBWCD-W-2019-9)。
关键词
三维地震勘探
采空区
下组煤
不同年限
冀中能源东庞矿
3D seismics exploration
goaf
lower group of coal
different age
Dongpang Coal Mine of Jizhong Energy Group
作者简介
第一作者:张昭,1983年生,男,河北平山人,高级工程师,从事煤田地震勘探工作.E-mail:41563199@qq.com;通信作者:殷全增,1965年生,河北邢台人,正高级工程师,从事煤田地质、物探等工作.E-mail:13931909280@126.com。
