Vol. 45 No. 4 Aug,2018
矿业安全与环保
MINING SAFETY & ENVIRONMENTAL PROTECTION
周客.采用钻屑量差值法考察超前排放钻孔有效影响半径[J].矿业安全与环保，2018,45(4)：110-113. 文章编号：1008-4495(2018)04011004
第45卷第4期 2018年8月
采用钻屑量差值法考察超前排放钻孔有效影响半径
周睿
（煤科集团沈阳研究院有限公司，过宁沈阳110016）
摘要：为了提高煤层超前排放钻孔有效影响半径测试工作的效率，在钻屑量指标测试方法的基础上，将施工测量钻孔改为直接施工排放钻孔，即在井下同一位置施工2个排放钻孔，利用2个排放钻孔测试的钻屑量差值来判定超前排放钻孔的有效影响半径，省略了扩孔工序，提高了影响半径的测试效率。采用钻屑量差值法对煤矿现场M5煤层瓦斯超前排放钻孔的有效影响半径进行考察，考虑到井下条件的复杂性，在测试区域内共布置5个测点，要求测点沿煤层走向不少于2个，沿煤层倾向不少于3 个，得出M5"煤层的超前排放钻孔有效影响半径为0.56~0.61m，并引入钻屑量临界指标验证了结果的准确性。从安全角度考虑，最终确定M5"煤层超前排效钻孔有效影响半径为0.50m。
关键词：煤与瓦斯突出；预测指标；差值法；有效影响半径；超前排放钻孔；钻屑量
中图分类号：TD713
文献标志码：B
Study on the Effective Influence Radius of Advance Discharge Drilling by Difference
Method of Drilling Cuttings Amount
ZHOU Rui
(CCTEG Shenyang Research Institute, Shenyang, JJ0016, China)
Abstract : In order to improve the eficiency of testing the effective influence radius of advance discharge drilling, on thes basis of the test method of drlling cuttings amount, the construction measurement drilling was changed to the direct construction discharge drilling, that means, two discharge boreholes were constructed at the same location in the coal mine. By using the cuttings difference between two discharge boreholes in tests, the effective influenoe radius of advance discharge drilling was determined, and the procedure of reaming was omitted, the test efficiency of influencing radius was improved. Acconding to
difference method of drilling
so
coal mine site was test. Considering the c
required that there should be along the coal seam inclinatio seam is from 0. 56 m to 0. 61 n
amount. From the perspective of safety, the ellective influen finally determined to be 0. 50 m
ey
adischat
g in the M5* coal seam at
drling
ged in the test area, it was
3
easuring points
te drilling in the M5" coal
e disehar
critical index of drlling cuttings
ce discharge drilling in the M5* coal seam was
Keywords : coal and gas outburst ;predictor;difference method;effective influence radius ;advance discharge drilling; drilling cuttings amount
超前排放钻孔是煤矿常用的一种煤巷局部防突
措施，经过大量现场实践证明，超前排放钻孔是保障煤矿安全生产的一种有效手段(1-2)。排放钻孔的施工距离，即超前排放钻孔有效影响半径是排放钻孔施的重要依据。超前排放钻孔有效影响半径的现场测
收稿日期：2017-0823;2018-07-09修订
作者简介：周睿(1985一），男，辽宁鞍山人，颈士，工程师，主要从事煤矿安全方面研究工作。E-mail；zhouruicumt@
126.com。· 110 . 万方数据
试方法主要有压降法[3-4]、流量法[5-6)、突出预测指标方法[7],还有数值模拟[8-10]、瓦斯流动理论分析[11-13] 等方法。现场测试方法得到的结果较为准确，但测试时间较长，成本较高，需要耗费一定的人力和物力；而数值模拟、瓦斯流动理论分析等方法相对简单，但测试的准确程度不能得到保证。因此，笔者对应用较多的钻屑量方法进行改进，直接测试2个排放钻孔的钻屑量，通过两者的差值来考察超前钻孔有效影响半径。