回采工作面煤层动态标定预测技术应用研究

刘文明; 高耀全; 蒋必辞; 李鹏; 薛悟强

doi:10.12363/issn.1001-1986.21.11.0616

回采工作面煤层动态标定预测技术应用研究

doi: 10.12363/issn.1001-1986.21.11.0616

刘文明^1,,
高耀全¹,
蒋必辞^{1, 2},
李鹏^{1, 3},
薛悟强⁴

基金项目: 天地科技股份有限公司科技创新创业资金专项重点项目(2019-TD-ZD003)；国家重点研发计划项目(2017YFC0804100)；天地科技股份有限公司科技创新创业资金专项项目(2018-TD-MSD072)

详细信息

第一作者:
刘文明，1990年生，男，山东临沂人，硕士，助理研究员，从事矿井地质透明化研究工作. E-mail：liuwm0506@126.com

中图分类号: P631
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- 被引次数: 0
出版历程
- 收稿日期: 2021-11-02
- 修回日期: 2021-12-27
- 发布日期: 2022-02-01
- 网络出版日期: 2022-01-27

Application research on dynamic calibration and prediction technology of coal seam in coalmine working face

LIU Wenming^1
,,
GAO Yaoquan¹,
JIANG Bici^{1, 2},
LI Peng^{1, 3},
XUE Wuqiang⁴

摘要

摘要: 智能开采对于地质条件的不适应问题非常突出，特别是对煤层起伏和厚度的绝对精度提出了更高的要求。三维地震勘探横向分辨率高，能够对煤层起伏进行控制，但在地震解释时，煤层底板高程受时深转换计算影响，存在一定的误差。针对这一问题，以工作面三维地震数据和采掘过程中探煤厚数据为基础，通过不断更新速度场提高煤层底板时深转换绝对精度；同时利用迭代插值算法，不断更新工作面煤层厚度；通过对计算得到的数据进行误差统计和分析。在TJH304回采工作面进行试验，利用工作面巷道和切眼探煤厚数据并结合三维地震资料动态解释后，工作面推采前方煤层底板高程值和厚度值绝对误差变小；特别是距离当前采煤面30 m以内的4个验证点煤层底板高程值误差范围为0.37~0.58 m，煤层厚度值误差为0.32~0.44 m。结果表明，三维地震动态解释技术可最大化将三维地震和井下生产数据有效结合，不断提高煤层空间精度，为智能开采提供预想煤层模型。
- 智能开采 /
- 地震动态解释 /
- 速度场刷新 /
- 迭代插值
Abstract: One of the prominent problems of intelligent mining is its inadaptability to geological conditions, especially for the absolute accuracy of coal seam floor and thickness. 3D seismic has a high horizontal resolution and it can control the ups and downs of the coal seam. However, due to the time domain data, the calculation of the coal seam floor elevation is negatively affected by the time-depth conversion point. On the basis of the 3D seismic data of the working face and the coal thickness data during the mining process, the absolute accuracy of the time-depth conversion of the coal seam floor is improved by continuously refreshing the velocity field. At the same time, the iterative interpolation algorithm is used to continuously update the coal seam thickness of the working face, then error statistics and analysis are conducted based on the calculated data. The experiment was carried out at TJH304 working face after using coal seam floor height and thickness of working face tunnel and mining face combined with the dynamic interpretation of the 3D seismic data. The absolute error of the coal seam floor elevation and thickness values in front of the working face is reduced. In particular, the four verification points within thirty meters from the current mining face and the coal seam floor elevation error is between 0.37-0.58 m; the coal seam thickness error is between 0.32-0.44 m. The results show that the 3D seismic dynamic interpretation technology can maximize the effective combination of 3D seismic and downhole production data, continuously improve the spatial accuracy of coal seam, and provide a prospective coal seam model for intelligent mining.
- intelligent mining /
- seismic dynamic interpretation /
- velocity field updating /
- iterative interpolation

HTML全文

图 1 TJH304工作面分布

Fig. 1 Sketch map of TJH304 longwall panel

下载: 全尺寸图片幻灯片

图 2 TJH304工作面推进方向地震剖面(A—A’)

Fig. 2 Seismic section map of TJH304 working face along mining direction(A-A’)

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图 3 巷道及切眼煤层底板测量点高程与双程旅行时相关关系

Fig. 3 The correlation of coal bottom elevation value and two-way time value of measure points in tunnel and initial mining surface

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图 4 不同开采阶段煤层底板高程数据更新前后的平均速度场平面图

Fig. 4 The average velocity comparison map updated by coal bottom elevation value of mining working face in different mining stages

下载: 全尺寸图片幻灯片

图 5 不同开采阶段煤层厚度数据更新前后的煤层厚度平面图

Fig. 5 The coal seam thickness comparison map updated by coal seam thickness value of mining working face in different mining stages

下载: 全尺寸图片幻灯片

表 1 不同开采阶段煤层底板与煤层厚度预测绝对误差

Table 1 Absolute error of the prediction of coal seam floor elevation and thickness in different mining stages

开采阶段	预测目标	验证点数	绝对误差范围/m	平均误差/m	0~0.5 m误差验证点数及概率/%	0.5~1.0 m误差验证点数及概率/%	大于1.0 m误差验证点数及概率/%
回采前	煤层底板	44	0.42~3.63	2.34	8/18.2	13/29.5	23/52.3
回采前	煤层厚度	44	0.27~1.89	1.32	11/25.0	13/29.5	20/45.5
回采300 m	煤层底板	22	0.34~3.26	2.12	5/22.7	7/36.4	10/45.5
回采300 m	煤层厚度	22	0.11~1.76	1.13	6/27.3	7/31.8	9/40.9

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