基于瑞利波技术的孤岛工作面风巷底板破坏深度探测
Destroyed Depth Detection of Airway Floor at Island Coal Face Based on Rayleigh Wave Technology
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摘要: 结合某矿1026孤岛工作面底板条件,采用瑞利波探测方法对孤岛工作面风巷底板进行探测。沿1026工作面风巷进行布置测线,从工作面煤壁前方5 m开始每隔5 m布置1个测点,测线总长60 m,共布置12个测点,探测方向为垂直于巷道底板向下。通过瑞利波探测剖面处理得出:巷道在超前支承压力范围内煤层底板的最大破坏深度为26.3 m,而孤岛工作面部分地段隔水层厚度只有30 m,因此在超前支承压力范围内其突水的可能性大大增加。Abstract: Combined with the floor conditions of 1026 island coal face in a Coal Mine, the airway floor at island coal face by using Rayleigh wave detector is detected. The measuring line was arranged along 1026 coal face airflow roadway; 12 measuring points was even distributed by 1 point every 5 m starting from 5 m ahead of the coal wall along the line which is 60 m long; the detection direction was vertically downward the floor. Depth profile process showed that the most damage depth of the roadway floor was 26.3 m within the range of lead abutment pressure; the thickness of block in part of section of the island coal face was only 30 m; compared with the most damage depth of the roadway floor, the possibility of water inrush increased greatly in the range of lead abutment pressure.
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Keywords:
- island coal face /
- Rayleigh wave survey /
- floor failure /
- depth /
- abutment pressure /
- water burst
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