煤-气交叉开采区天然气井防碰撞预警技术研究

A study on collision warning of gas wells in coal-gas cross mining area

  • 摘要: 伴随着多种矿产资源协同交叉开采逐渐常态化,天然气井安全形势日渐严峻。以鄂尔多斯盆地煤-气交叉开采为研究对象,提出了基于振动波监测的防碰撞预警技术方法,防止掘进机与天然气井碰撞事故的发生。通过钢管敲击振动试验及煤矿井下掘进振动试验,研究振动波在钢管及煤岩中的衰减规律,并根据振动衰减规律推导出掘进机到天然气井距离计算公式。研究结果表明:振动波在钢管和煤岩中传播衰减系数不同,但衰减规律基本相同,均符合指数衰减规律,振动波先急速衰减,随后缓慢衰减。为实现地面监测井下掘进机到天然气井的距离、防止碰撞、预测预警提供参考。

     

    Abstract: Along with the gradual normalization of coordinated cross-mining of multiple mineral resources, the safety situation of natural gas wells has become increasingly serious. Taking coal-gas cross-mining in the Ordos Basin as the research object, this paper proposed an anti-collision early warning method based on vibration wave monitoring prevent the occurrence of collision accidents between roadheader and gas well. Through the steel pipe percussion vibration test and coal mine excavation vibration test, the attenuation law of vibration waves in the steel pipe and coal rock is studied, and the formula for calculating the distance from the roadheader to the natural gas well is deduced according to the vibration attenuation law. The results show that the attenuation coefficients of vibration waves in steel pipes and coal rocks are different, but the attenuation laws are basically the same, both conforming to the exponential attenuation law, with the vibration waves first decaying rapidly and then slowly. It provides a reference for the realization of surface monitoring of the distance from the roadheader to the natural gas well, preventing collision and predicting early warning.

     

/

返回文章
返回