Title:
SMART COAL CAVING METHOD BASED ON REAL TIME MONITORING OF VARIATION IN TOP COAL THICKNESS
Document Type and Number:
WIPO Patent Application WO/2020/173030
Kind Code:
A1
Abstract:
A smart coal caving method based on real time monitoring of variation in top coal thickness, using ultrawide-band radar and laser 3D scanning technology to monitor top coal thickness information in real time and automatically regulate the opening and closing of a coal caving opening, and comprising the following steps: (I) an ultrawide-band radar apparatus (4) calculates a variation in top coal thickness on the basis of a radar echo signal; (II) a laser 3D scanning apparatus (6) calculates a coal caving amount on the basis of a scanned coal flow geometric feature, coal flow speed, and coal caving time at the coal caving opening; (III) a function equation between the top coal thickness variation and the coal caving time is established, and optimal open and close times of the coal caving opening for different coal caving stages are calculated; and (IV) open and close instructions are sent to the coal caving opening by means of a top coal caving controller, thus achieving smart coal caving in a fully-mechanized caving workface. The present method allows for accurate control and strong adaptability in the entire coal caving process, without the need for manual interference, effectively raising coal caving efficiency, and reducing labor intensity.
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Inventors:
LIU WANLI (CN)
YU BIN (CN)
WANG SHIBO (CN)
YI SHIXUE (CN)
YU BIN (CN)
WANG SHIBO (CN)
YI SHIXUE (CN)
Application Number:
PCT/CN2019/094518
Publication Date:
September 03, 2020
Filing Date:
July 03, 2019
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
E21C41/18; E21D23/12
Foreign References:
| CN109856631A | 2019-06-07 | |||
| CN107676095A | 2018-02-09 | |||
| CN109113741A | 2019-01-01 | |||
| CN104314599A | 2015-01-28 | |||
| CN106437713A | 2017-02-22 | |||
| CN107725089A | 2018-02-23 | |||
| DE4016929C1 | 1991-09-26 |
Attorney, Agent or Firm:
NANJING ZHENGLIAN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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