水分对阳泉3#煤力学性质影响研究
The Influence Research of Moisture on Mechanical Properties of Yangquan No.3 Coal Mine
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摘要: 为了获得水分对煤体力学性质的影响规律，为煤层注水防治冲击地压和煤与瓦斯突出的机理研究和注水参数的确定提供依据，模拟了水分对煤体弹性模量和抗压强度的影响。首先采用数值模拟的方法，模拟了注水后不同水分条件下煤体弹性模量的变化情况；实验模拟了不同水分、不同围压条件下煤体抗压强度的变化情况。结果表明，煤层注水后，在注水孔周围弹性模量有一定的降低，从740 MPa降到540 MPa，使弹性模量降低到原始煤体的60%左右，随着水分的增加，煤体抗压强度不断减小，煤体抗压强度和水分对应关系式为R=5.053 8e-0.169 7W，确定了煤层注水的合理水分为6%~8%。Abstract: In order to obtain the influence law of moisture on mechanical properties of coal, and provide the basis for the research of coal seam affusion to prevent and control percussive ground pressure and coal and gas outburst, the paper simulates the influence of moisture on modulus of elasticity and compression strength of coal. The paper uses the method of numerical simulation to simulate the change of elastic modulus of different moisture of coal after coal seam affusion; experimental simulates the change of compression strength of coal with different moisture and confining pressure. The results show that the elastic modulus becomes low around the injection hole after the coal seam affusion, from 740 MPa to 540 MPa, which makes the elastic modulus down to about 60% of the original coal body. As the increase of moisture,the compressive strength of the coal has been declined, the relational expression of compressive strength and moisture is R=5.053 8e-0.169 7W,and determines that the reasonable injection of coal seam affusion is 6%-8%.
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Keywords:
- rock burst /
- coal and gas outburst /
- compression strength /
- elastic modulas /
- reasonable water
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[1] 赵阳升.矿山岩石流体力学[M].北京：煤炭工业出版社1994：71. [2] 于不凡，王佑安. 煤矿瓦斯灾害防治及利用技术手册[M].修订版.北京:煤炭工业出版社, 2005：685-690. [3] 马丕梁.煤矿瓦斯防治灾害技术手册[M].北京:化学工业出版社,2007. [4] О.И切耳诺夫，E.C罗赞采夫. 瓦斯突出危险煤层井田的准备[M].宋世钊，于不凡,译.北京：煤炭工业出版社，1980：181-246. [5] 瞿涛宝. 论煤层注水处理瓦斯的效果[J].煤矿安全, 1994, 25 (5) ：39-42. [6] 潘一山. 阜新矿区冲击地压及其注水防治研究[D]. 阜新：辽宁工程技术大学,2004：37-45. [7] 肖知国，王兆丰. 煤层注水防治煤与瓦斯突出机理的研究现状与进展[J].中国安全科学学报，2009，19（10）：150-158. [8] 马衍坤，王恩元，徐文全，等. 注水过程渗流对煤体的影响分析[J].煤矿安全, 2009, 40 (8)：74-77. [9] 王青松，金龙哲，孙金华. 煤层注水过程分析和煤体润湿机理研究[J].安全与环境学报, 2004, 4 (1)：70-73. [10] 周世宁.煤层瓦斯赋存与流动理论[M].北京：煤炭工业出版社，1999：41-44. [11] 李宗翔，孙平，刘海义. 注水煤体应力能V-f 转化与释放机理研究[J].中国地质灾害与防治学报，2005, 16 (2)：67-70. [12] 宋维源，李大广，章梦涛，等.煤层注水的水气驱替理论研究[J].中国地质灾害与防治学报, 2006, 17 (2)：147-150.
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