Research on Test of MWD System Used for Exploration of the Hidden Geological Factors Causing Disasters in Coal Mine
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摘要: 井下随钻测量定向钻进技术是煤矿隐蔽致灾地质因素重要探查手段之一,与常规钻进技术相比,具有轨迹精确可控、分支覆盖面广、坐标位置可计算等优势。为检验新型随钻测量系统测量结果的准确性,在井下进行了现场测试试验,实钻了2个试验孔,结果表明:新型随钻测量系统准确性好,实钻偏差能够保证在孔深5‰允许范围内,可提供足够准确的三维坐标参数,满足煤矿隐蔽致灾地质因素井下精确探查的要求。Abstract: The directional drilling technology with MWD system used in underground is one of the important means for ex-ploration of hidden geological factors causing disasters in coal mine.Compared with the conventional drilling technology, directional drilling technology has the advantages of precise trajectory control, broad branches coverage, calculation of coor-dinates and some others.In order to test the accuracy of the measurement results of the new MWD system, a field experi-ment was carried out in the well and 2 testing holes were drilled.The results show that the accuracy of new MWD system is excellent, the real drilling deviation can be kept in the allowable range of 5‰of the borehole depth and can provide accu-rate three-dimensional coordinate parameters to meet the requirements of accurate exploration of hidden geological factors causing disasters in coal mine.
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